Unix C C++ Lab MCA Sem 1 and 2

Unix, C & C++

‘C’Lab Manual

Unix, C & C++

'C' Lab ManualExamples: -

1. Write a function to input a character and display the character input twice.

Solution

#include<stdio.h>main()

{char c;c=getc(stdin);fflush(stdin);putc(c, stdout);putc(c,stdout);}

Output:***

2. Write a function to accept and display a string.

Solution


{char in_str[21];puts("Enter a string to a maximum of 20 characters");gets(in_str);fflush(stdin);puts(in_str);}

Output:

Enter a string to a maximum of 20 charactersWelcomeWelcome

3. Write a function to accept and store two characters in different memory locations, and display them one after the other using the functions getchar() and putchar().

Solution


{

Unix, C & C++

char a,b;a=getchar();fflush(stdin);b=getchar();fflush(stdin);putchar(a);putchar(b);}

Output:

1a1a

4. Write a function that prompts the user to input a name upto a maximum of 25 characters, and display the following message:

Hello. How do you do?(name)

Solution


{char instr[26];puts("Enter Your Name to a maximum of 25 characters");gets(instr);fflush(stdin);puts("Hello. How do you do?");puts(instr);}

Output:Enter Your Name to a maximum of 25 charactersCharlesBabbageHello. How do you do?CharlesBabbage

5. Write a function that prompts for a name (upto 20 characters) and address (upto 30 characters) and accepts them one at a time. Finally the name and address are displayed in the following way:

i. Your name is:ii. (name)

iii. Your address is:iv. (address)

Unix, C & C++

Solution


{char name[21], addrs[31];puts("Enter your Name to a maximum of 20 characters");gets(name);fflush(stdin);puts("Enter your Address to a maximum of 30 characters");gets(addrs);fflush(stdin);puts(“Your Name is:");puts(name);puts(“Your Address is:");puts(addrs);}

Output:

Enter your Name to a maximum of 20 charactersMacmillanEnter your Address to a maximum of 30 characters5, Dale Street, New YorkYour Name is:MacmillanYour Address is:5, Dale Street, New York

6. Write a function using the if…else condition, if the input character is A then display a message "Character is A" otherwise display a message "Character is not A"

Solution


{char chr;puts("Enter a character");chr=getchar();fflush(stdin);if(chr=='A')puts("Character is A");elseputs("Character is not A");}

Unix, C & C++

Output:(When a wrong character is entered)

Enter a characteraCharacter is not A

Output:(When a right character is entered)

Enter a characterACharacter is A

7. Write a nested if..else construct to check if an input character is in upper-case or lower-case.

Solution 7


{char inp;puts("Enter a character");inp=getchar();fflush(stdin);if(inp>='A')if(inp<='Z')puts("Upper case”);else if(inp>='a')if(inp<='z')puts("Lower case”);}

Output 1:

Enter a characteraLower case

Output 2:

Enter a characterGUpper case

Unix, C & C++

8. Write a program that checks whether an input character is a digit or not.

Solution

#include<stdio.h>#include <ctype.h>main(){char s;s=getchar();if (isdigit(s))

puts(“The character is a number”);else

puts(“The character is not a number”);}

Output:5The character is a number

9. Write a function to check if the input character is a vowel, else print an appropriate message.

Solution


{char in_chr;puts("Enter a character in lower case:");in_chr=getchar();fflush(stdin);if(in_chr=='a')puts("Vowel a");else if(in_chr=='e')puts(“vowel e");else if(in_chr=='i')puts(“vowel i”);else if(in_chr=='o')puts(“vowel o”);else if(in_chr=='u')puts(“vowel u");elseputs("The character is not a vowel");}

Unix, C & C++

Output:

Enter a character in lower case:evowel e

10. Write a function that accepts a single-character grade code, and depending on what grade is input, displays the DA percentage according to the table given below:

Grade DA%1 95%2 80%3 70%4 65%

Solution


{

char inp;puts("Enter Grade Code:");inp=getchar();fflush(stdin);

if(inp=='1')puts("DA percentage is 95%");else if(inp =='2')puts("DA percentage is 80%");else if(inp =='3')puts("DA percentage is 70%");else if(inp =='4')puts("DA percentage is 65%");else puts("Invalid Grade Code");

}

Output:

Enter Grade Code:2DA percentage is 80%

Unix, C & C++

11. Write a function to display the following menu and accept a choice number. If an invalid choice is entered an appropriate error message must be displayed, else the choice number entered must be displayed.

Solution


{char chc;puts("Menu");puts("1. Masters");puts("2. Transaction");puts("3. Reports");puts("4. Exit");puts(" ");puts("your choice :");chc=getchar();fflush(stdin);switch(chc){case'1' : puts(“choice is 1");

break;case'2' : puts(“choice is 2");



break;default : puts("Invalid choice");}}

Output:

Menu1. Masters2. Transaction3. Reports4. Exit

your choice :1choice is 1

Menu1. Master2. Transaction3. Reports4. Exit

Your Choice :

Unix, C & C++

12. Write a function to accept characters from the keyboard until the character '!' is input, and to display the total number of vowel characters entered.

Solution

#include <stdio.h>main(){

int v;char inp;v=0;while(inp!='!'){puts("Enter a character");inp=getchar();fflush(stdin);switch(inp){case'A' :case'a' :case'E' :case'e' :case'I' :case'i' :case'O' :case'o' :case'U' :case'u' :

v++;break;

} }puts("No. of vowels are : ");printf("%d", v);}

Output:Enter a characterqEnter a characteraEnter a characterpEnter a charactereEnter a character

Unix, C & C++

!No. of Vowels are :2

13. Write a function to accept a character and display it 40 times.

Solution


{char chr;int i=0;puts("Enter a character”);chr=getchar();fflush(stdin);while(i<40){putchar(chr);i=i+1;}}

Output:

Enter a character#########################################

14. Write a function that accepts a number from 0 to 9. A string should then be displayed the number of times specified.

Solution


{char str[50],i;int rep,j=0;puts("Enter a string”);gets(str);fflush(stdin);puts("Enter the number of times”);i=getchar();fflush(stdin);switch(i)

Unix, C & C++

{case '0' : rep=0;break;case '1' : rep=1;break;case '2' : rep=2;break;case '3' : rep=3;break;case '4' : rep=4;break;case '5' : rep=5;break;case '6' : rep=6;break;case '7' : rep=7;break;case '8' : rep=8;break;case '9' : rep=9;break;default : puts("Invalid choice");}while(j<rep){puts(str);j=j+1;}}

Output:Enter a stringWhere there is a will there is a wayEnter the number of times5Where there is a will there is a wayWhere there is a will there is a wayWhere there is a will there is a wayWhere there is a will there is a wayWhere there is a will there is a way

Unix, C & C++

15. Write a function that accepts either 'y' or 'n' only as input. For any other character input, an appropriate error message should be displayed and the input accepted again.

Solution


{char yn;do{puts("Enter y/n (Yes/No)”);yn=getchar();fflush(stdin);if(yn!='y' &&yn!='n')puts("Invalid input”);}while(yn!='y'&&yn!='n');}

Output:

Enter y/n (Yes/No)mInvalid inputEnter y/n (Yes/No)3Invalid inputEnter y/n (Yes/No)y

16. Write a function to accept ten characters from the character set, and to display whether the number of lower-case characters is greater than, less than or equal to number of upper-case characters. Display an error message if the input is not an alphabet.

Solution


{char chr;int I, low, upp;low=upp=0;for (I=0;I<10;I=I+1){puts("Enter a character");

Unix, C & C++

chr=getchar();fflush(stdin);if(chr<'A'||(chr>'Z'&&chr<'a')||chr>'z'){puts("the input is not an alphabet");}else if(chr>='a'&&chr<='z'){low=low+1;}else upp=upp+1;}if(low>upp)puts("count of lower-case characters is more");else if(upp>low)puts("count of upper-case characters is more");elseputs("count of lower-case and upper-case characters is equal"); }

Output:

Enter a characteraEnter a characterAEnter a characterSEnter a characterBEnter a characterMEnter a characteryEnter a character@the input is not an alphabetEnter a character2the input is not an alphabetEnter a character+the input is not an alphabetEnter a characterzcount of upper-case characters is more

Unix, C & C++

17. Write a function to find the sum of numbers entered until the input value 999 is entered or until 10 numbers have been entered.

Solution


{int num,sum,cnt;cnt=sum=0;while(cnt<10){printf("Enter a number(999 to quit)\n");scanf("%d",&num);fflush(stdin);if(num==999)break;sum=sum+num;cnt=cnt+1;}printf("The sum of %d numbers is :%d\n",cnt, sum);}

Output:

Enter a number(999 to quit)11Enter a number(999 to quit)14Enter a number(999 to quit)78Enter a number(999 to quit)19Enter a number(999 to quit)999The sum of 4 numbers is :122

18. Write a function to accept 8 numbers and print the sum of all positive numbers entered.

Solution


{int I,sum,num;

Unix, C & C++

sum=num=0;for(I=0;I<8;I=I+1){puts("Enter a number");scanf("%d",&num);fflush(stdin);if(num<=0)continue;sum=sum+num;}printf("The sum of positive numbers entered is %d\n",sum);}

Output:

Enter a number5Enter a number-2Enter a number3Enter a number4Enter a number-1Enter a number7Enter a number2Enter a number1The sum of positive numbers entered is 22

19. Write a function that stores the alphabets A to Z in an array by making use of their ASCII codes, given that the ASCII code of character A is 65. The function should also display the string.

Solution


{int I, asc=65;char alpha[27];for(I=0;I<26;I=I+1){alpha[I]=asc;

Unix, C & C++

asc=asc+1;}alpha[26]='\0';printf("The alphabets are :%s\n",alpha);}

Output:

The alphabets are :ABCDEFGHIJKLMNOPQRSTUVWXYZ

20. In a file delete utility program for 5 files the user response to whether a file is to be deleted or not is to be stored in an array as 'Y' for yes and 'N' for no for all files. By default the user response should be N for all files. Write a function that sets up an array and accepts users response.

Solution


{char ans, file_yn[5];int I;for(I=0;I<5;I=I+1)file_yn[I]='N';printf("The string has been initialized \n");for(I=0;I<5;I=I+1){printf("Enter Y/N for deleting a file no# %d\n",I+1);ans =getchar();fflush(stdin);if(ans=='y'||ans=='Y')file_yn[I]=ans;}printf("\n The status Report: \n");for(I=0;I<5;I=I+1)printf("Delete file no# %d : %c\n",I+1,file_yn[I]);}

Output:

The string has been initializedEnter Y/N for deleting a file no# 1yEnter Y/N for deleting a file no# 2nEnter Y/N for deleting a file no# 3Enter Y/N for deleting a file no# 4

Unix, C & C++

nEnter Y/N for deleting a file no# 5y

The status Report:Delete file no# 1 : yDelete file no# 2 : NDelete file no# 3 : NDelete file no# 4 : NDelete file no# 5 : y

21. Write a function to convert a character string into lower case

Solution


{char in_str[101];int I=0;printf("Enter a string (upto 100 characters)\n");gets(in_str);fflush(stdin);while(in_str[I]!='\0'){if(in_str[I]>='A'&&in_str[I]<='Z')in_str[I]=in_str[I]+32;I=I+1;}printf("The converted string is %s\n",in_str);}

Output:

Enter a string (upto 100 characters)The Little Brown Fox Jumped Over a pussyThe converted string is the little brown fox jumped over a pussy

22. Write a function to compare two strings and to print the larger one. The strings may be compared in terms of ASCII code of each character in the string.

Solution


{

Unix, C & C++

char str1[101],str2[101];int diff, I=0;printf("Enter string#1(upto 100 chrs)\n");gets(str1);fflush(stdin);printf("Entering string#2(upto 100 chrs)\n");gets(str2);fflush(stdin);do{diff=str1[I]-str2[I];if(str1[I]=='\0'||str2[I]=='\0')break;I=I+1;}while(diff==0);if(diff>0)printf("Larger string :%s \n",str1);else if(diff<0)printf("Larger string :%s\n",str2);elseprintf("strings are equal\n");}

Output:

Enter string#1(upto 100 chrs)HelloEntering string#2(upto 100 chrs)HellLarger string :Hello

23. Write a function to accept a maximum of 25 numbers and to display the highest and lowest numbers along with all the numbers.

Solution


{int arry[25], low, high, I=-1;do{I=I+1;printf("Enter no.%d,(0 to terminate)\n",I+1);scanf("%d",&arry[I]);fflush(stdin);

Unix, C & C++

}while(arry[I]!=0);I=0;low=high=arry[0];while(arry[I]!=0)

{if(low>arry[I])low=arry[I];else if (high<arry[I])high = arry[I];I=I+1;}

for(I=0;arry[I]!=0;I=I+1)printf("Number %dis %d\n",I+1,arry[I]);printf("Lowest number is %d\nHighest number is %d\n",low, high);

}

Output:

Enter no.1,(0 to terminate)5Enter no.2,(0 to terminate)9Enter no.3,(0 to terminate)14Enter no.4,(0 to terminate)23Enter no.5,(0 to terminate)78Enter no.6,(0 to terminate)19Enter no.7,(0 to terminate)0Number 1is 5Number 2is 9Number 3is 14Number 4is 23Number 5is 78Number 6is 19Lowest number is 5Highest number is 78

Unix, C & C++

24. Write a program, which reads in a year and reports on whether it is a leap year or not.

Solution


{int year;printf("\n please input the year:");scanf("%d",&year);fflush(stdin); if((((year%4)==0)&&((year%100)!=0))||((year%400)==0)){printf("\n\n Given year %d is a leap year", year);}else{printf("\n\n Given year %d is not a leap year",year);} }

Output:

please input the year:1940

Given year 1940 is a leap year

25. Write a program to determine the length of a string.

Solution


{int count;char mesg[25];char*ptr;printf(“Enter a String :”);gets(mesg);for(ptr=mesg,count=0;*ptr!='\0';ptr++){count++;}printf("Length of the string is :%d\n",count); }

Output:

Enter a String :WelcomeLength of the string is :7

Unix, C & C++

26. Write a program to compare two strings and determine if they are the same.

Solution

#include<stdio.h>main(){char *ptr1,*ptr2;char m1[20], m2[20];int c=0;printf("Enter the first String" );gets(m1);printf("Enter the second String" );gets(m2);for(ptr1=m1,ptr2=m2;(*ptr1!='\0')&&(*ptr2!='\0'); ptr1++,ptr2++){ if(*ptr1==*ptr2) { c=1; continue; }

else { c=0; break; }}if( c==0) printf("The two strings are not the same");elseprintf("The two strings are the same");}

Output1:

Enter the first StringGodEnter the second StringGodThe two strings are the same

Output2:

Enter the first StringGoodEnter the second StringFoodThe two strings are not the same

Unix, C & C++

27. Write a program to copy a formatted string into a character array.

Solution

#include<stdio.h> main(){int a, b;char cmd[25];puts("Enter 2 numbers \n");scanf("%d%d”, &a,&b);fflush(stdin);sprintf(cmd, "The sum of %d and %d is %d",a,b, (a+b));puts(cmd); }

Output:

Enter 2 numbers

23The sum of 2 and 3 is 5

28. Write a program to search for a character in the input string.

Solution

#include<stdio.h>#include<string.h>

char str[51]="";search(char* s, char c); main(){char chr;puts("Enter a string:");scanf(“%s”,str);fflush(stdin);puts(“Enter a character to search for :”);scanf("%s",&chr);fflush(stdin);search(str,chr); }search(string,c)char*string;char c;

Unix, C & C++

{int I, len;char rev_str[100];len=strlen(string);for(I=0;len!=0;len--,I++)rev_str[I]=string[I];I=0;while (rev_str[I]!=’\0’){if(rev_str[I]==c)printf(“character :%c found at %d position \n”,c,I+1);I++;}

}

Output:Enter a string:WelcomeEnter a character to search for :echaracter :e found at 2 positioncharacter :e found at 7 position

29. Write a function sum() to add two values and to return the value to the main function and print the value.

Solution

#include<stdio.h>sum(int a,int b); main(){int x,y,value;scanf(“%d%d”,&x,&y);fflush(stdin);value=sum(x,y);printf(“Total is %d \n”,value);}sum(int a,int b){return a+b;}

Output:

37Total is 10

Unix, C & C++

30. Write a program to call a function power(m,n) to display the nth power of the integer m.

Solution

#include<stdio.h>power(int *m,int *n);main(){int x,y;printf(“Enter number :”);scanf(“%d”,&x);fflush(stdin);printf(“Enter power to raise to :”);scanf(“%d”,&y);fflush(stdin);power(&x,&y);}power(int *m,int *n){int I=1,val=1;while(I++<=*n)val=val**m;printf(“%dth power of %d is %d \n”,*n,*m,val);}

Output:

Enter number :2Enter power to raise to :55th power of 2 is 32

31. Write a program to display the error messages shown in the table along with the error number.

Solution

#include<stdio.h>#define Errors 4char err_msg[][29]={

Error Number Error Message

Directory not foundFunction not foundMissing errorData type error

Unix, C & C++

“Directory not found”,“Function not found”,“Missing error”,“Data type error “

};main(){int err_no;for(err_no=0;err_no<Errors;err_no=err_no+1){printf(“\nError message %d is :%s”,err_no+1,err_msg[err_no]);}}

Output:

Error message 1 is : Directory not foundError message 2 is : Function not foundError message 3 is : Missing errorError message 4 is : Data type error

32. Give appropriate statements to accept values into the members of the structure date and then print out the date as mm/dd/yyyy. Assume that the members of the structure are : day, month and year.

Solution

scanf (“%d%d%d”,&date.day,&date.month,&date.year);printf(“%d/%d/%d”,date.month,date.day,date.year);

33. Declare a structure as followsEmployee Number (3 character)Employee First Name (20 characters)Employee Last Name (20 characters)Employee Initial (1 character)

Write a code to input the names of 3 employees and print out their initials along with their employee number. The employee number should be assigned automatically in a serial order.

Solution

#include<stdio.h>

struct{char eno [6];char efname [21];

Unix, C & C++

char elname [21];char einitial;} empstruct[3];

main(){int I;for(I=0;I<3;I++){sprintf(empstruct[I].eno, "EMP#%d",I+1);printf("Employee Number:%s\n", empstruct[I].eno);printf("Enter the employee name (firstName Initial lastName):");scanf("%s %c %s", &empstruct[I].efname, &empstruct[I].einitial, &empstruct[I].elname);}for(I=0;I<3;I++){printf("\n%s : %s %c %s\n",empstruct[I].eno,empstruct[I].efname,empstruct[I].einitial,empstruct[I].elname);}}

Output:

Employee Number:EMP#1Enter the employee name (firstName Initial lastName):abc d efgEmployee Number:EMP#2Enter the employee name (firstName Initial lastName):hij k lmnEmployee Number:EMP#3Enter the employee name (firstName Initial lastName):opq r stu

EMP#1 : abc d efg

EMP#2 : hij k lmn

EMP#3 : opq r stu

34. Write a function to update salary with the following data

Solution

If salary is Increment salary by

< Rs6000 Rs 1000between Rs 6000 and Rs10000 Rs 2000>= Rs10000 Rs 3000

Unix, C & C++

Solution

#include<stdio.h>sum_bal(sal)float sal;{if(sal <6000)return (sal+1000);else if(sal>=6000 && sal<10000)return(sal+2000);elsereturn (sal+3000);}main(){ float sl, s; printf("Enter Salary : "); scanf("%f", & sl); s = sum_bal(sl); printf("%f", s);}

Output :

Enter Salary : 1200015000.000000

35. Write a program to accept a number as a string and return the sign and absolute value.

Solution

#include<stdio.h>main(){char str[6];printf(“Enter a Number”);gets(str);char sgn = ‘+’;int n=0;if(str[n]== ‘-’)

{ sgn = ‘-’ ; }

printf(“Sign : %c\n”,sgn);printf(“Abs. Value: “);

Unix, C & C++

while(str[++n] != ‘\0’) putchar(str[n]);}

Output 1:

Enter a Number-125Sign : -Abs. Value: 125

Output 2:

Enter a Number456Sign : +Abs. Value: 5636. Find the error in following code.

cal(x,y)int x,y;{return x+y;return x-y;return x*y;}

Solution

The program gives an unreachable code warning.

37. Find the error in the following code.

Solution #include<stdio.h>main(){char inp;FILE *pointer1;pointer1=fopen(“hi1.txt”,”w”);while((inp=fgetc(pointer1))!=eof){printf(“%c”,inp);}

}

The file hi1.txt should be opened in the read mode (“r”) for input. The variable eof cannot be written in lower case.

Unix, C & C++

38. Write a program to append the contents of the first file to the second file. The program should also terminate in the following cases

a. If 2 arguments are not specified on the command line. Then displayUsage : append file1file2

b. If the file to be read cannot be opened then displayCannot open input file.

Solution

#include<stdio.h>#include<process.h>main(argc,argv)int argc;char *argv[];{FILE *ptr1,*ptr2;char inp;if(argc!=3){printf("Usage : append file1file2\n");exit(1);}else{if((ptr1=fopen(argv[1],"r"))==NULL){printf("cannot open input file \n");exit(1);}}ptr2=fopen(argv[2],"a");while((inp=fgetc(ptr1))!=EOF){fputc(inp,ptr2);}fclose(ptr1);fclose(ptr2);}

Save the file as cla.c

Output:

Consider file1.txt contains: I am fine. Consider file2.txt contains:How are you?

Unix, C & C++

In the command prompt type as follows:

C:> Cla file1.txt file2.txt

Now the file1.txt contains I am fine

File2.txt contains How are you? I am fine.

Exercise: -

1. Write a program to find out the product of digits of a three-digit number.

2. Write a program to accept the details(name, salary) of 5 persons and give a grade according to the salary range and finally display the name, salary and grade using

a. switch-caseb. if-else

3. Write a program to find the sum and product of numbers from 50 to 100 using a while loop.

4. Write a program to find the factorial of a number.

5. Write a program to display all even numbers from 1 to 100.

6. Write a program that will read in numerical values for x and n , evaluate the formula y=x^n using function.

7. Write a program that displays the numbers that are cubes of numbers from 1 to 10.

8. Write a program to find out the number of occurrences of a particular character in a string.

9. Write a program to accept a string and check if it is a palindrome or not.

10. Write a program to find out if a number is Armstrong number or not.

11. Write a program to arrange the names in alphabetical order with swapping done in a separate function.

12. Write a program to find the out the average in 5 subjects of 10 STUDENTS.

Unix, C & C++

C++

Lab Manual

Unix, C & C++

C++

Lab Manual

1. Write a simple program that prints a string on the screen.

Solution

#include<iostream.h>#include<conio.h>main (){

cout << "Welcome to C++ lab Exercise"; getch();}

2. Write a program to find the average of two numbers.

Solution

#include<iostream.h>#include<conio.h>main () {

float num1, num2, sum, avg;cout << "Enter two numbers :";cin >> num1;

cin >> num2;sum = num1+num2;avg=sum/2;cout << "Sum = " << sum << "\n";cout << "Average = " << avg << "\n";

getch(); }

3. Write a program to get the Name, Age, address, phone number from the user and display them by using the class function.

Solution

#include<iostream.h>#include<conio.h>

Unix, C & C++

class sample{char name[30];int age;char add[30];int phone;public :

void getdata(void);void display(void);

};

void sample :: getdata(void){cout << " Enter your Name : " ;cin >> name;cout << " Enter your Age :";cin >> age;cout << " Enter your Address :";cin >> add;cout << " Enter your Phone Number :";cin >> phone;}

void sample :: display(void){

cout << "\n Name : " << name;cout << "\n Age : " << age;cout << "\n Address : " << add;cout << "\n Phone Number : " << phone;

}

void main(){

sample s;s.getdata();s.display();

getch();}

4. What is the output of the following code?

Solution

#include<iostream.h>#include<conio.h>

Unix, C & C++

int a=10;void main(){ int a=15; cout<<a<<::a<<endl; ::a=20; cout<<a<<::a; getch(); }

5. Write a program to get the input from the user and display the out what he\she has entered.

Solution

#include<iostream.h>#include<conio.h>void main(void){char a[999];cout << "Type something :" << endl;cin >> a;cout << "You have typed :" << a << endl;getch();}


Solution

#include<iostream.h>#include<conio.h>void main(){ int a=5,x; int b=6; x=++a+b++; cout<<x<<a<<b; getch();}

7. Write a program to convert the alphabet from lower case to uppercase.

Unix, C & C++

Solution

#include<iostream.h>#include<ctype.h>#include<conio.h>void main(void){

Unix, C & C++

char mydata = 'a';char s= toupper(mydata);cout <<" My data in ASCII is : " << s << "." << endl;getch();}


Solution

#include<iostream.h>#include<conio.h>class c{ volatile x; public: void show() { x=9.899; cout<<x; } };

void main(){ c c1; c1.show(); getch();}

9. Write a program to input a text string and count the length of it using get() and put().

Solution

#include<iostream.h> #include<conio.h>

main(){int count = 0;char c;cout<< "Input text\n";cin.get(c);while(c != '\n'){cout.put(c);

Unix, C & C++

count ++;cin.get(c);}cout <<"\nNumber of characters = "<< count << "\n";getch( );}

10. Write a program to multiply numbers by taking assigned default values (First assign default values 3 and 10 and then substitute 3 with 4 and 10 and then substitute 4&10 with 4 and 5).

Solution

#include<iostream.h>#include<conio.h>int multiply ( int x=3, int y=10);void main(void){int iresult;iresult = multiply();cout << "\n When using multiply ( ) : iresult="<< iresult << endl; iresult = multiply( 4 );cout << "\n When using multiply (4 ) : iresult="<< iresult << endl; iresult = multiply( 4, 5 );cout << "\n When using multiply (4 5 ) : iresult="<< iresult << endl;

getch( ); }

int multiply ( int x, int y){return x*y;}

11. Find the error in the program and explain it.

Solution

#include <iostream.h>void main(){for (int i=1; i<3; i++){int j=3;cout << i;}cout<<i;cout<<j;}

Unix, C & C++

When you execute the program you get an error j is not declared. But you have declared

j. The problem is that you have declared the variable j with in the for( ) loop. Thus the

scope is only in between the braces({}) of the for () loop. Declare the j variable outside

the for() loop as you have declared the i variable.

12. Write a program to display two variables by declaring them as local and global variables and show the result has follows.

Solution

#include<iostream.h>#include<conio.h>int a=200;void main (void){cout<<"\n Results :";cout<<"\n ----------";int a =100;cout<<"\n Local variable is :"<<a;cout<<"\n global variable is :"<< a<<endl;}

13. Find if any error exists and correct the parameter list.

Solution

Int showit ( int s);Float showit ( int s);

Since there cannot be two identical list of Parameters even if the returned values is different. So we can change the parameter list as follows.

Int showit ( int s, int t);Int showit ( int s);

14. Write a program to find the inverse of a number.

Solution

#include<iostream.h>#include<conio.h>void main(){float a;

Unix, C & C++

char b;do{cout<<"Enter a number:";cin>>a;if(a= =0)break;cout<<"Inverse of the number is :"<<1/a;cin>>b;}while(b!='n');getch( );}

15. Write a program to find the square of the numbers less than 100.

Solution

#include<iostream.h>#include<conio.h>void main(){int a;char b='y';do{cout<<"Enter a number :";cin>>a;if(a>100){cout<<"The number is greater than 100, enter another number :"<<endl;continue;}cout<<"The square of the numbers is :"<<a*a<<endl;cout<<"Do you want to enter another (y/n)";cin>>b;}while(b!='n');getch( );}

16. Find the output of the following statements.

Solution

#include<iostream.h>#include<conio.h>void main()

Unix, C & C++

{int i;for(i=0;i<10;i++);cout<<i;getch();}

17. Find the output of the following program

Solution

#include<iostream.h>#include<conio.h>void main(){

int a=12,b;b=++a;cout<<"a ="<<a<<"b="<<b<<endl;

getch( );}

18. Write a program to get the input from the user and check if the input value is "y" or "n", if it is other than these values return a message " Invalid option". If it is right choice return a message "Right choice".

Solution

#include<iostream.h>#include<conio.h>void main(){char a;cout<<"Enter y or n";cin>>a;if(a = = 'y' | | a = = 'n' ){cout<<"Right choice";}else{cout<<"Invalid choice";}getch();}

Unix, C & C++

19. Write a program to convert temperature from farenheit to Celsius.

Solution

#include<iostream.h>#include<conio.h>void main(){float a;cout<<"Enter the temperature in Farenheir:";cin >>a;float b=(a-32)*5/9;cout<<"The equivalent temperature in Celsius is:"<<b<<endl;getch( );}

20. Write a program to input two numbers and find the largest of them using nesting member function.

Solution

#include<iostream.h>#include<conio.h>class set{

int m,n; public:

void input(void);void display(void);int largest(void);

};int set :: largest(void){if(m>=n)

return (m);else

return(n);}void set :: input(void){

cout<<"Input values of m and n" << "\n";cin >> m >>n;

}void set :: display(void){

Unix, C & C++

cout<<"Largest value ="<< largest( ) << "\n";}main( ){

set A;A.input( );A.display( );getch( );

}

21. Write a program to calculate the square of the first ten natural numbers.

Solution

#include<iostream.h>#include<conio.h>void main(){int a;for(a=1;a<=10;a++){cout<<a*a<<" ";}getch( );}

22. Write a program using function to add two numbers.

Solution

#include<iostream.h>#include<conio.h>int add(int,int);void main(){int a,b,c;cout<<"Enter two numbers:"<<endl;cin>>b;cin>>c;a=add(b,c);cout<<"The sum of the two numbers is :" <<a<<endl;getch();}int add(int x, int y){return x+y;}

Unix, C & C++

23. Write a program to accept two numbers and find the greatest number among them.

Solution

#include<iostream.h>#include<conio.h>void main(){int a,b;cout<<"Input the first number:";cin>>a;cout<<"Input the second number:";cin >>b;if(a>b){cout<<"a is greater than b" <<endl;}else{cout<<"b is greater than a" <<endl;}getch();}

24. Write a program to find whether the input number is an even or odd number.

Solution

#include<iostream.h>#include<conio.h>void main(){int a;cout<<"Enter a number:";cin>>a;if((a!=0)&&((a%2) = = 0)){cout<<"Even number";}else{cout<<"Odd number or the number is Zero";}getch();}

Unix, C & C++

25. Write a program to accept strings into a two-dimensional array and display them (User can enter five strings).

Solution

#include<iostream.h>#include<conio.h>void main(){char name[5][21];int i;for(i=0; i<5; i++){cout<<"Enter Name "<<(i+1)<<" : ";cin>>name[i];}for (i=0; i<5; i++){cout<<"Name"<<(i+1)<<" is : "<<name[i]<<endl;}getch();}

26. Write a program that calculates the sum of two or three numbers.(The first two numbers are 25 35 and the second set of numbers 12 13 45)

Solution

#include<iostream.h>#include<conio.h>int add(int, int);int add(int, int, int);void main(){cout<<"Sum of two Numbers is : " << add(25,35)<<endl;cout<<"Sum of three Numbers is : " << add(12,13,45)<<endl;getch();}int add(int a, int b){return a+b;}int add( int a, int b, int c){return a+b+c;}

Unix, C & C++

27. Write a program to print hi followed by the name of the user entered at the command line.

Solution

#include<iostream.h>#include<conio.h>void main ( int argc, char *argv[]){if (argc!=2){cout<<" You have not typed your name"<<endl;}else{cout<<" Hi "<<argv[1]<<endl;}getch();}

28. Write a program to input three students Name and Age and display them.

Solution

#include<iostream.h>#include<conio.h>class student{char name[30];

float age;public:

void getdata(void); void putdata(void);};void student :: getdata(void){

cout << "Enter Name :";cin >> name;cout << "Enter Age:";cin >> age;

}void student :: putdata(void){

cout << "Name :" << name << "\n";cout << "Age :" << age << "\n";

}

Unix, C & C++

const int size = 3;main(){ student info[3];for(int i=0; i<size; i++){

cout<<"\nDetails of Students" << (i+1) << "\n";info[i].getdata();

}cout << "\n";for (int i=0; i< size; i++){

cout <<"\nStudent"<< (i+1) << "\n";info[i].putdata();

}getch();}

29. Write a program to find the mean of two numbers (25,40) using the friend function.

Solution

#include<iostream.h>#include<conio.h>class sample{int a;int b;public:void setvalue ( ) { a = 25; b =40; }friend float mean(sample s);};

float mean(sample s){

return float(s.a + s.b)/2.0;}

main(){sample x;x.setvalue();cout << "Mean value = " << mean(x) << "\n";getch();}

Unix, C & C++

30. Write a program to display Roll number and marks of Tamil and English subjects and the total marks scored, using multilevel inheritance.

Solution

#include<iostream.h>#include<conio.h>class student{protected:int roll_number;public:void get_number(int);void put_number(void);};void student :: get_number(int a){roll_number =a;}void student :: put_number(){cout << "Roll Number :" << roll_number << "\n";}class test : public student{protected:float tamil;float english;public:void get_marks(float, float);void put_marks(void);};void test :: get_marks(float x, float y){tamil = x; english=y;}void test :: put_marks(){cout<<"Marks scored in Tamil = " <<tamil << "\n";cout<<"Marks scored in English = " <<english << "\n";}class result : public test{float total;public:

Unix, C & C++

void display(void);};void result :: display(void){total = tamil+english;put_number();put_marks();cout<<"Total = " << total << "\n";}main(){result student1;student1.get_number(222);student1.get_marks(90.0, 90.0);student1.display();getch();

}

Do it yourself: -

1. Write a program to input city names and ask a question from the user whether he wants to add more cities.

2. Write a program to find the volume of a cube, cylinder, and rectangle. For the given values (cube length = 10, cylinder radius =2.5 and height = 8, rectangle length = 100, breath = 75 and height = 15).

3. Write a program to perform the following, a vendor wants to place an order with a dealer to purchase provision items, by providing the following details such as the code number and price of each item. The user has to perform adding an item to the list deleting an item from the list and printing the total value of the order.

The output of the screen should be as follows (ask the option from the user)

You can do the following : Enter appropriate number

1 : Add an item 2 : Display total value 3 : Delete an item 4 : Display all items 5 : Quit

4. Write a program to construct a matrix of size m x n.

5. Write a program to swap the input numbers.

Unix, C & C++

6. Write a program to accept the invoice number and rate of an item from the user and display “ The amount for the Invoice no (Invoice no) is amount.

7. Write a program to find who is the elder person from the given data and display their name and age as given in the out put format.

Name Age

1. vijay 272. sundar 283. saro 32

Out put format

Elder person isName :Age:

Unix, C & C++

Unix Lab Manual

Solved Examples: -

1. Give the command to create a password for a new user.

Solution

The passwd command is used to create password for new user.

2. What is the command used to display the current working directory.

Solution

The pwd command is used to display the full path of the current working directory.

3. Create a new directory called sample in the current working directory and under the sample directory create a new directory called test.

Solution

mkdir sample cd sample mkdir test

4. What is the command used to change from the current working directory to the parent directory.

Solution

cd .. is used to change to parent directory.

5. What is the command to list all the files and directories under current working directory?

Solution

ls

Output

$ pwd/usr/student/sample

Unix, C & C++

$ lstest

6. Give the command to display the name of your terminal file.

Solution

who am I command displays the name of your terminal file. The command displays:

a) login nameb) user’s terminal file name c) day and the time user logged in

Output

$ who am Istudent ttyp0 Jun 27 11:06

7. Give the command to display the message “Error Message.. keep the cursor on the same line” along with a beep sound.

Solution

echo "Error Message... Keep the cursor on the same line\C\007"

Output

$ echo "Error Message... Keep the cursor on the same line\C\007"Error Message... Keep the cursor on the same line\C

8. Write a shell script called Sample that asks the user to enter their name, and then display the message

HI (User name)….! Solve the problem!

Solution

echo “Hi ${LOGNAME}……!”echo “Solve the problem…!”

Output

$ sh s8Hi student......!Solve the problem...!

Unix, C & C++

9. Give the command to provide execute permission for the owner of the file. The name of the file is sample_test.

Solution

chmod u+x sample_testOutput

$ ls -l sample_test-rw-r--r-- 1 student group 39 Jun 27 11:44 sample_test$ chmod u+x sample_test$ ls -l sample_test-rwxr--r-- 1 student group 39 Jun 27 11:44 sample_test

10. How can a user set the Unix prompt to – Type here:

Solution

PS1=“Type here :”

Output

$ PS1="Type here :"Type here :

11. How can the user reset the prompt to the $symbol?

Solution

PS1=“$”

Output

Type here :PS1="$"$

12. Write a script that checks if an argument is passed and prints the number of arguments passed. The script exits without printing anything if the argument string is empty.

Solution

if test $# = 0thenexitelse

Unix, C & C++

echo “No of arguments entered: $#” fi

Output

$sh s12$sh s12 GodNo of arguments entered: 1$sh s12 God GreatNo of arguments entered: 2

13. What does the following shell script do?

if test $# != 1then echo “Invalid number of arguments”exitelseecho “continuing execution”fi

Solution

Checks the number of arguments entered. If the number of arguments entered is not 1, then the script displays “ Invalid number of arguments” and exits. Otherwise it prints “Continuing Execution”

Output

$sh s13Invalid number of arguments$sh s13 abccontinuing execution$sh s13 a bInvalid number of arguments

14. Write a shell script which will accept two strings and compare the two to see if the two strings are same. If they are same, the message “Strings are equal” should be displayed. If the 2 strings are different, the message “Strings are not equal” should be displayed.

Solution

echo “Enter first string:\c”read str1echo “Enter second string:\c”read str2if test $str1 = $str2

Unix, C & C++

then echo “Strings are equal”else echo “Strings are not equal”fi

Output

$sh s14Enter first string:GodEnter second string:GoodStrings are not equal$sh s14Enter first string:GreatEnter second string:GreatStrings are equal

15. State what the following shell script called test1 does.

echo “Display contents of file: $1”cat $1cp $1 $2echo “File copied successfully”

Solution

The shell script test1 takes 2 filenames as arguments. The contents of the first file is displayed after specifying the message “Display contents of the file” followed by the name of the first file. The script copies the contents of the first file to the second file and displays the message “File copied successfully”.

Output

$cat sI am fine$cat mcat: cannot open m: No such file or directory (error 2)$sh test1 s mDisplay contents of file: sI am fineFile copied successfully$cat mI am fine

Unix, C & C++

16. Create a file called sample_file with the content “This is a sample file” and close the file.

Solution

$cat > sample_file <enter>This is a sample file <enter><ctrl +d>

17. Write a command to redirect the contents of the file sample_file to test_file.

Solution

cat sample_file > test_fileOutput

$cat sample_file > test_file$cat test_fileThis is a sample file

18. Create two files sample1 and sample2. In sample1 enter the following content“This is a sample file for test”

In the sample2 file enter the following content “This is a Sample file for test”

Compare the two files and find where they differ Solution

cmp sample1 sample2

Output

$cat > sample1This is a sample file for test$cat > sample2This is a Sample file for test$cmp sample1 sample2sample1 sample2 differ: char 11, line 1

19. State whether the following statement is true

If 2 files differ in five lines, then the cmp command will display all the differences?

Solution

No, only the first difference is displayed.

Unix, C & C++

20. Two files are identical from lines 1 to 50. However, one of the files contain a black line at the end of the file. Will the cmp command indicate that the two files are different?

Solution

Yes, because a blank space is also a character.

21. Give the command to check if a file called test is present in the current directory or any of its subdirectories.

Solution

find . –name test –printOutput

$find . -name test -print./test

22. Give the command to delete all the files in a subdirectory called sub that were accessed within a day.

Solution

find ./sub -atime -1 -exec rm {} \;

Output

$ls subab$find ./sub -atime -1 -exec rm {} \;rm: ./sub directory$ls sub$

23. What is the command used to find all the subdirectories in the current directory?

Solution

find . –type d –print

Output

$find . -type d -print../sub

Unix, C & C++

24. Find the errors in the following commands

find . –name “ram*” –exec rm

Solution

The {}are missing after rm, the characters \;are also missing.

25. Give the command to sort a file called phone_numbers and redirect the sorted list to a new file called phone_list.

Solution

sort phone_numbers > phone_list Output

$cat phone_numbersAmar 4568998John 2344545Bala 2345667Mala 4567578$sort phone_numbers > phone_list$cat phone_listAmar 4568998Bala 2345667John 2344545Mala 4567578

26. Write a script to get an input from the user to run unix commands and use the case structure to display the commands. If the user wants to exit without entering any option in the case provide an exit to exit from the program.

Solution

while true doecho “Enter the number of the program you wish to run”echo “(press ‘q’ to exit)”echo “1 date 2 who”echo “3 ls 4 pwd”read choicecase $choice in1) date;;2) who;;3) ls;;

Unix, C & C++

4) pwd;;q)break;;*)echo” Choice is not in the list”esacdone

Output

$sh chooseEnter the number of the program you wish to run(press 'q' to exit)1 date 2 who3 ls 4 pwd1Thu Jun 27 14:01:26 IST 2002Enter the number of the program you wish to run(press 'q' to exit)1 date 2 who3 ls 4 pwd2student ttyp0 Jun 27 11:32Enter the number of the program you wish to run(press 'q' to exit)1 date 2 who3 ls 4 pwd3testchooseEnter the number of the program you wish to run(press 'q' to exit)1 date 2 who3 ls 4 pwd 4/usr/student/Ex/subEnter the number of the program you wish to run(press 'q' to exit)1 date 2 who3 ls 4 pwd q$

27. Give the command to display the following.

i. The day is : (dd)ii. The weekday is :( name of weekday)

Unix, C & C++

Solution

a) date "+ The day is :%d"b) date "+ The weekday is : %a"

Output

$date "+ The day is :%d"The day is :27$date "+ The weekday is :%a"The weekday is :Thu

28. Write a shell script to check if the name of a person is present in 2 files

Solution

echo "Enter the file names"read aread becho " The list of names present in both the files"sort $a $b | uniq -d#uniq -d $a $b

Output

$cat L1VijaiAjaiHaresh$cat L2RajeshVijaiSatish$sh s28Enter the file namesL1L2The list of names present in both the filesVijai

29. Write a shell script to replace a particular character of the file.

Solution

echo " Enter the name of the file to be edited"read f

Unix, C & C++

echo " Enter the character to be searched"read secho " Enter the character to be substituted"read wecho " File after Modification"cat $f | tr $s $w

Output

$cat demoHow are you?I am fine.$sh s29 Enter the name of the file to be editeddemo Enter the character to be searcheda Enter the character to be substituted# File after ModificationHow #re you?I #m fine.

30. Write a shell script to accept a set of names and display them in alphabetical order

Solution

echo " enter the number of names"read necho " Enter the names"if test -f "xymn345man23"thenrm xymn345man23fiwhile test $n -gt 0doread secho $s | cat >> xymn345man23n=`expr $n - 1`doneechoecho " The Alphabetical order for the names enter is "sort xymn345man23

Output

$sh s30

Unix, C & C++

enter the number of names3 Enter the namesUshaVidyaPraveena

The Alphabetical order for the names enter isPraveenaUshaVidya

31. Write a shell script to find the home directory of the user.

Solution

echo "Enter the user name"read uecho "Home directory of $u is :"echo `grep $u /etc/passwd | cut -d: -f6`

Output

Enter the user namestudentHome directory of student is :/usr/student

32. Write a shell script to reverse a string

Solution

echo " Enter a String"read sz=ècho $s | wc -m`while test $z -gt 0doz=èxpr $z - 1ècho -n ècho $s | cut -c$z`doneecho

Output

$sh s32 Enter a StringWelcomeemocleW

Unix, C & C++

33. Write a shell script to find the factorial of a number

Solution

echo "Enter a number"read nf=1i=1while test $i -le $ndof=èxpr $f \* $iì=èxpr $i + 1`doneecho " Factorial of $n is $f"

Output

$sh s33Enter a number5Factorial of 5 is 120

34. Write a shell script to check if a number is positive negative or zero

Solution

echo " Enter a number"read nif test $n -eq 0thenecho "The entered number is zero"elif test $n -lt 0then echo "The number is negative"elseecho " The number is positive"

fi

Output

$sh s34 Enter a number3 The number is positive$sh s34 Enter a number

Unix, C & C++

-1The number is negative$sh s34 Enter a number0The entered number is zero

35. Write a shell script to delete a directory

Solution

echo " Enter the name of the directory to be deleted"read sc=`ls $s | wc -l`if test $c = 0thenrmdir $selserm -r $sfi

Output

$sh s35 Enter the name of the directory to be deletedsub$cd subsub: does not exist

36. Write a shell script to list the files in a directory

Solution

echo "Enter the name of the directory"read dls $d

Output

$sh s36Enter the name of the directorylabm45m46m48m49s

Unix, C & C++

37. Write a shell script to check if the string entered is name of a directory

Solution

echo " Enter the name of the directory"read sif [ -d $s ]thenecho " It is the name of the directory "elseecho " It is not a name of the directory "fi

Output

$sh s37Enter the name of the directoryfirstIt is not a name of the directory$sh s37Enter the name of the directorylabIt is the name of the directory

38. Write a shell script to check if the character entered is a vowel or not

Solution

echo "Enter a character"read acase $a ina) echo "It is a vowel";;e) echo "It is a vowel";;i) echo "It is a vowel";;o) echo "It is a vowel";;u) echo "It is a vowel";;*) echo "Not a vowel";;esac

Output$sh s38Enter a characteraIt is a vowel$sh s38

Unix, C & C++

Enter a characterqNot a vowel

39. Write a shell script to check if arguments are given to a script or not

Solution

if test -z "$*"thenecho "No argument"elseecho "Arguments are : $*"fi

Output

$sh s39No argument$sh s39 1 2 3Arguments are : 1 2 3

40. Write a script program to accept two numbers and find the sum.

Solution

echo "Enter 2 numbers "read aread bc=`expr $a + $b`echo "Sum is $c"

Output

$sh s40Enter 2 numbers53Sum is 8

41. Write a shell script to display the following output122333444455555

Unix, C & C++

Solutionfor i in 1 2 3 4 5doj=1while [ $j -le $i ]doecho -n $ij=`expr $j + 1`doneechodone

42. Write a script to check if a file is writeable

Solution

echo "Enter a file name"read hif [ ! -w $h ]thenecho "### You cannot edit \007###"elseecho "You can edit the file"fi

Output

$ls -l a-rwxr--r-- 1 student group 0 Jun 26 15:58 a$sh s42Enter a file nameaYou can edit the file$chmod u-w a$ls -l a-r-xr--r-- 1 student group 0 Jun 26 15:58 a$sh s42Enter a file namea### You cannot edit ###

43. Write a shell script to copy files

Solution

echo "Source file :\c"

Unix, C & C++

read secho "Destination file :\c"read d

cp $s $d

Output$cat aGod is Great$cat s$sh s43Source file :aDestination file :s$cat sGod is Great

44. Write a shell script to accept a number from 0 to 9 and display the same number in words.

Solution

echo "Enter a number from 0 to 9 "read rcase $rin0) echo zero;;1) echo one;;2) echo two;;3) echo three;;4) echo four;;5) echo five;;6) echo six;;7) echo seven;;8) echo eight;;9) echo nine;;*) echo invalid character;;esac

Output

$ sh s44Enter a number from 0 to 95five$sh s44Enter a number from 0 to 9winvalid character

Unix, C & C++

45. Write a shell script to execute date and then display good morning, good afternoon or good evening as appropriate.

Solution

echo `date`hour=`date|cut -c12-13`echo $hourif [ $hour -gt 0 -a $hour -lt 12 ]thenecho "Good Morning"elif [ $hour -gt 12 -a $hour -lt 14 ]thenecho "Good Afternoon"elseecho "Good Evening"fi

Output

$sh s45Thu Jun 27 15:59:14 IST 200215Good Evening

46. Write a shell script to look for a person’s phone number in the phone book.

Solution

if [ $# -ne 1 ]thenecho "usage : Enter name "elseoutput=` grep $1 /usr/student/test/phone_book `l=` echo $output | wc -c`if [ l != 0 ]thenecho "$output"fifi

Output

$cat ./test/phone_bookabc 12 asdsafsdfsdf

Unix, C & C++

def 13 sdsdhsdfhshdfdfjhkjfhij 14 dfsdfsfsdfsdfdfdf$sh s46usage : Enter name$sh s46 abcabc 12 asdsafsdfsdf$sh s46 xyz $

47. Write a shell script that displays two lines of stars with an interval of 60 seconds between each display.

Solution

a=1while [ $a -lt 80 ]doecho -n “*”a=`expr $a + 1`donesleep 60a=1while [ $a -lt 80 ]doecho -n “*”a=`expr $a + 1`done

Output

$sh s47******************************************************************************************************************************************

48. Write a shell script that converts all the lower case alphabets in the file s into upper case alphabets and display the result.

Solution

tr a-z A-Z < sOutput

$cat sGod is Great$tr a-z A-Z < sGOD IS GREAT

Unix, C & C++

49. Write a shell script to remove a file called sam from the current directory and move it to a subdirectory called sub.

Solution

mv sam ./sub

Output

$ls sa*samsample_filesat$ls ./subs$mv sam ./sub$ls sa*sample_filesat$ls ./subssam

50. Write a shell script to see if a user already exists.

Solution

echo "Enter User Name"read useridif grep "^$userid:" /etc/passwd > /dev/nullthenecho "### $userid already exists ###"echo "### abort ###"exitfi

Output

$sh s50Enter User Namestudent### student already exists ###### abort ###$sh s50Enter User NameStud$

Unix, C & C++

Exercise: -

1. Write a shell script to swap two numbers2. Write a shell script to move a file in one directory to another directory3. Write a shell script to display the following output

112123123412345

4. Write a shell script to find the sum of numbers from 1 to 105. Write a shell script to display all the names of the files starting with the letter s the

current directory.6. Write a shell script to accept a number from 1 to 12 and display the corresponding

month (1 January, 2 February, … , 12 December)7. Write a shell script to generate a Fibonacci series8. Write a shell script that counts the number of words in a file9. Write a shell script to find the greatest of 3 numbers10. Write a shell script that asks for the capital of India and repeats the question until

the user gives the correct answer.

Unix C C++ Lab MCA Sem 1 and 2

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