Important Programs in c

I m p o r t a n t P r o g r a m s o f C l a n g u a g e P a g e | 1

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IMPORTANAT NOTICE:

If you are studying C++ instead of C language. Or

you are feeling that these programs are quite different

from the pattern discussed in your class. Then don’t

worry, just make the following changes in programs

and they’ll be all according to your pattern:

Replace

#include<stdio.h> and

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

Raplace

Printf() statement by cout<<” “;

Replace

Scanf() statement by cin>>

For further information

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INDEX

Math

digits

Program to count digits

To calculate power of 10

To reverse numbers

To reverse numbers precisely

To separate most significant digits

To separate 6 most significant digits

To separate n least significant digits

To separate n most significant digits

Factorials

Factorial using while loop double

Factorial using while loop int

Factorial using for loop 1

Factorial using for loop 2

Fibbonacci series

Fibbonacci series for loop



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Fibbonacci series while loop

Fibbonacci series using arrays

Calculating power

Calculating power using int

Calculating power using long

Calculating power using float

Star patterns

Simple stars

Stars taking no. of lines (for loop)

Stars taking no. of lines and star per line (for loop)

Stars reversed pattern (for loop)

Stars taking no. of lines (while loop)

Stars taking no. of lines and star per line (while loop)

Stars reversed pattern (while loop)

Stars with spaces

Right hand triangle (for loop)

Central triangle (half dimond)(for loop)

Right hand triangle (while loop)

Central triangle (half dimond)(while loop)

Stars with starting and ending point

Left triangle (for loop)



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Left triangle with a condition (for loop)

Left triangle (while loop)

Left triangle with a condition (while loop)

Diamonds

Using for loop

Using while loop

Arrays and matrices

Initializing arrays

Initializing 1Darrays with user input

Initializing 2Darrays with user input

Initializing & printing 1Darrays with user input

Initializing & printing 2Darrays with user input

Initializing matrices

Initializing a 3x3 matrix antidaigonal

Initializing a 7x7 identity matrix

Initializing a 7x7 matrix antidaigonal

Initializing a 7x7 matrix cross

Initializing a 7x7 matrix full outergrid

Initializing a 7x7 matrix half outergrid

Initializing a 7x7 matrix tridaigonal

Initializing a 7x7 matrix tridaigonal anti



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Matrix operations

Matrix scalar multiplication

Matrix addition

Matrix multiplication 3x3



Nested loops Nested for loop

Nested while loop

Nested while test1

Nested while test2

Nested while test3



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math

digits

1- Program to count digits

#include <stdio.h>

#include <conio.h>

int main (void)

{

long number;

int digits;

clrscr();

printf("Enter the number : ");

scanf("%li",&number);

for(digits=0;number>0;digits++)

number = number/10;

printf("The no. of digits are : %i",digits);

getch();

return 0;

}



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2- To calculate power of 10

#include <stdio.h>

#include <conio.h>

int main (void)

{

int i,power;

long result=1;

clrscr();

printf("Enter the power : ");

scanf("%i",&power);

for(i=0;i<power;i++)

result *= 10;

printf("10 raised to the power %i is : %li",power ,result);

getch();

return 0;

}



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3- To reverse numbers

#include <stdio.h>

#include <conio.h>

int main (void)

{

long num,rev_num=0;

int num_dig,sep_dig;

clrscr();


scanf("%li",&num);

//Separating Digits

for(num_dig=1;num>0;num_dig++)

{

sep_dig = num % 10;

num = num / 10;

rev_num = (rev_num * 10) + sep_dig;

printf("Digit no. %i is : %i\n",num_dig ,sep_dig);

}

printf("The reversed number is : %li\n",rev_num);

getch();

return 0;

}



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4- To reverse numbers precisely

#include <stdio.h>

#include <conio.h>

int main (void)

{

long num,rev_num=0;

int sep_dig;

clrscr();


scanf("%li",&num);

//Separating Digits

while(num>0)

{

sep_dig = num % 10;

num = num / 10;

rev_num = (rev_num * 10) + sep_dig;

}

printf("The reversed number is : %li\n",rev_num);

getch();

return 0;

}



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5- To separate most significant digits

#include <stdio.h>

#include <conio.h>

int main (void)

{

long number,temp,divisor=100;

int i,num_dig,sep_dig;

clrscr();



//Separating Digits

for(num_dig=0;number>0;num_dig++)

{

sep_dig = number / divisor;

number = number - (sep_dig * divisor);

divisor /= 10;


}

getch();

return 0;

}



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6- To separate 6 most significant digits

#include <stdio.h>

#include <conio.h>

int main (void)

{

long number,temp,divisor=100000;


clrscr();



//Separating Digits


{



divisor /= 10;


}

getch();

return 0;

}



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6- To separate n least significant digits

#include <stdio.h>

#include <conio.h>

int main (void)

{

long number;

int num_dig,sep_dig;

clrscr();



//Separating Digits


{

sep_dig = number % 10;

number = number / 10;


}

getch();

return 0;

}



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7 - To separate n most significant digits

#include <stdio.h>

#include <conio.h>

int main (void)

{ long number,temp,divisor=1;


clrscr();



//Counting Digits

temp = number;

for(i=0;temp>0;i++)

temp = temp/10;

//Calculating initial value of divisor

num_dig = i;

while(num_dig>1)

{

divisor *= 10;

num_dig--;

}

//Separating Digits

for(num_dig=i;num_dig>0;num_dig--)

{





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divisor /= 10;


}

getch();

return 0;

}

Factorials

1- Factorial using while loop double

#include <stdio.h>

#include <conio.h>

int main (void)

{

int n;

double z=1;

clrscr();

printf("Calculating factorial of : ");

scanf("%i",&n);

while(n>0)

{

z *= n;

n-- ; }

printf("%f",z);

getch();

return 0;

}



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2- Factorial using while loop int

#include <stdio.h>

#include <conio.h>

int main (void)

{

int n,z=1;

clrscr();


scanf("%i",&n);

while(n>0)

{

z *= n;

n--;

}

printf("%i",z);

getch();

return 0;

}

3- Factorial using for loop 1

#include <stdio.h>

#include <conio.h>

int main (void)

{

int n,z=1;

clrscr();




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scanf("%i",&n);

for(;n>0;n--)

z *= n;

printf("%i",z);

getch();

return 0;

}

4- Factorial using for loop 2

#include <stdio.h>

#include <conio.h>

int main (void)

{

int n,z=1;

clrscr();


scanf("%i",&n);

for(;n>0;)

{

z *= n;

n--;

}

printf("%i",z);

getch();

return 0;

}



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Fibbonacci series

1- Fibbonacci series for loop

#include <stdio.h>

#include <conio.h>

int main (void)

{

int i,n,x=0,y=1,z;

clrscr();

printf("Number of values to be printed for the fibbonacci series: ");

scanf("%i",&n);

for(i=0;i<n;i++)

{

z = x+y;

x = y;

y = z;

printf("%i\t",x);

}

getch();

return 0;

}

2- Fibbonacci series while loop #include <stdio.h> #include <conio.h> int main (void) { int i,n,x=0,y=1,z; clrscr();



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printf("Number of values to be printed for the fibbonacci series: "); scanf("%i",&n); i=0; while(i<n) { z = x+y; x = y; y = z; i++; printf("%i\t",x); } getch(); return 0; }

3- Fibbonacci series using arrays #include <stdio.h> #include <conio.h> int main (void) { int a[15]; int i,x=0,y=1,z; clrscr(); /*Calculating and storing the first 15 values of the series in an array*/ i=0; while(i<15) { z = x+y; x = y; y = z; a[i] = x; i++; } /*Printing the values stored in the array*/ i=0; while(i<15) { printf("%i\t",a[i]); i++; } getch();



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return 0; }

Calculating power

1- Calculating power using int #include <stdio.h> #include <conio.h> int main (void) { int i,number,power,result=1; clrscr(); printf("Enter the number : "); scanf("%i",&number); printf("Enter the power : "); scanf("%i",&power); for(i=0;i<power;i++) result *= number; printf("The result is : %i",result); getch(); return 0; }

2- Calculating power using long #include <stdio.h> #include <conio.h> int main (void) { int i; long number,power,result=1; clrscr(); printf("Enter the number : "); scanf("%li",&number);



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printf("Enter the power : "); scanf("%li",&power); for(i=0;i<power;i++) result *= number; printf("The result is : %li",result); getch(); return 0; }

3- Calculating power using float #include <stdio.h> #include <conio.h> int main (void) { int i,power; float number,result=1; clrscr(); printf("Enter the number : "); scanf("%f",&number); printf("Enter the power : "); scanf("%i",&power); for(i=0;i<power;i++) result *= number; printf("The result is : %f",result); getch(); return 0; }



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Star patterns

Simple stars

1- Stars taking no. of lines (for loop) #include <stdio.h> #include <conio.h> int main (void) { int m,n,i,j; clrscr(); printf("Number of lines of stars : "); scanf("%i",&m); printf("Number of stars per line : "); scanf("%i",&n); for(i=0;i<m;i++) { for(j=0;j<n;j++) { printf("*"); } printf("\n"); } getch(); return 0; }

2- Stars taking no. of lines and star per line (for loop) #include <stdio.h> #include <conio.h> int main (void) { int m,i,j;



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clrscr(); printf("Number of lines of stars : "); scanf("%i",&m); for(i=0;i<m;i++) { for(j=0;j<i;j++) { printf("*"); } printf("\n"); } getch(); return 0; }

3- Stars reversed pattern (for loop) #include <stdio.h> #include <conio.h> int main (void) { int m,n,i,j; clrscr(); printf("Number of lines of stars : "); scanf("%i",&m); n=m; for(i=0;i<m;i++) { for(j=0;j<n;j++) { printf("*"); } n--; printf("\n"); } getch(); return 0; }



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4- Stars taking no. of lines (while loop) #include <stdio.h> #include <conio.h> int main (void) { int m,n,i,j; clrscr(); printf("Number of lines of stars : "); scanf("%i",&m); printf("Number of stars per line : "); scanf("%i",&n); i=0; while(i<m) { j=0; while(j<n) { printf("*"); j++; } printf("\n"); i++; } getch(); return 0; }

5- Stars taking no. of lines and star per line (while loop) #include <stdio.h> #include <conio.h> int main (void) { int m,i,j; clrscr(); printf("Number of lines of stars : ");



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scanf("%i",&m); i=0; while(i<m) { i++; j=0; while(j<i) { j++; printf("*"); } printf("\n"); } getch(); return 0; }

6- Stars reversed pattern (while loop) #include <stdio.h> #include <conio.h> int main (void) { int m,n,i,j; clrscr(); printf("Number of lines of stars : "); scanf("%i",&m); n=m; i=0; while(i<m) { i++; j=0; while(j<n) { j++; printf("*"); } n--; printf("\n");



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} getch(); return 0; }

Stars with spaces

1- Right hand triangle (for loop) #include <stdio.h> #include <conio.h> int main (void) { int m,n,i,j; clrscr(); printf("Number of lines of stars : "); scanf("%i",&m); n=m; for(i=0;i<m;i++) { for(j=0;j<n;j++) { printf(" "); } n--; for(j=0;j<=i;j++) { printf("*"); } printf("\n"); } getch(); return 0; }

2- Central triangle (half dimond)(for loop)



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#include <stdio.h> #include <conio.h> int main (void) { int m,n,i,j; clrscr(); printf("Number of lines of stars : "); scanf("%i",&m); n=m; for(i=0;i<m;i++) { for(j=0;j<n;j++) { printf(" "); } n--; for(j=0;j<=(2*i);j++) { printf("*"); } printf("\n"); } getch(); return 0; }

3- Right hand triangle (while loop) #include <stdio.h> #include <conio.h> int main (void) { int m,n,i,j; clrscr(); printf("Number of lines of stars : "); scanf("%i",&m);



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n=m; i=0; while(i<m) { i++; j=0; while(j<n) { j++; printf(" "); } n--; j=0; while(j<i) { j++; printf("*"); } printf("\n"); } getch(); return 0; }

4- Central triangle (half dimond)(while loop) #include <stdio.h> #include <conio.h> int main (void) { int m,n,i,j; clrscr(); printf("Number of lines of stars : "); scanf("%i",&m); n=m; i=0; while(i<m)



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{ i++; j=0; while(j<n) { j++; printf(" "); } n--; j=0; while(j<((2*i)-1)) { j++; printf("*"); } printf("\n"); } getch(); return 0; }

Stars with starting and ending point

1- Left triangle (for loop) #include <stdio.h> #include <conio.h> int main (void) { int m,n,i,j; clrscr(); printf("Number of stars to start with : "); scanf("%i",&m); printf("Number of stars to end with : "); scanf("%i",&n); for(i=m;i<=n;i++) { for(j=0;j<i;j++) { printf("*");



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} printf("\n"); } getch(); return 0; }

2- Left triangle with a condition (for loop) #include <stdio.h> #include <conio.h> int main (void) { int m,n,i,j; clrscr(); printf("Number of stars to start with : "); scanf("%i",&m); printf("Number of stars to end with : "); scanf("%i",&n);

if(m<=n)

{ for(i=m;i<=n;i++) { for(j=0;j<i;j++) { printf("*"); } printf("\n"); } } else { printf("Wrong set of values for input variables"); } getch(); return 0; }

3- Left triangle (while loop) #include <stdio.h> #include <conio.h>



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int main (void) { int m,n,i,j; clrscr(); printf("Number of stars to start with : "); scanf("%i",&m); printf("Number of stars to end with : "); scanf("%i",&n); i=m; while(i<=n) { j=0; while(j<i) { printf("*"); j++; } i++; printf("\n"); } getch(); return 0; }

4- Left triangle with a condition (while loop) #include <stdio.h> #include <conio.h> int main (void) { int m,n,i,j; clrscr(); printf("Number of stars to start with : "); scanf("%i",&m); printf("Number of stars to end with : "); scanf("%i",&n); if(m<=n) { i=m; while(i<=n)



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{ j=0; while(j<i) { printf("*"); j++; } i++; printf("\n"); } } else { printf("Wrong set of values for input variables"); } getch(); return 0; }

Diamonds

1- Using for loop #include <stdio.h> #include <conio.h> int main (void) { int m,n,p,i,j; clrscr(); printf("Enter a number for the diamond : "); scanf("%i",&m); //upper triangle n=m; for(i=0;i<m;i++) { for(j=0;j<n;j++) { printf(" ");



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} n--; for(j=0;j<=(2*i);j++) { printf("*"); } printf("\n"); } //lower triangle p=0; for(i=0;i<=m;i++) { for(j=0;j<n;j++) { printf(" "); } n++; for(j=p;j<=(2*m);j++) { printf("*"); } p+=2; printf("\n"); } getch(); return 0; }

2- Using while loop #include <stdio.h> #include <conio.h> int main (void) { int m,n,p,i,j; clrscr(); printf("Number of lines of stars : "); scanf("%i",&m); //upper triangle n=m; i=0;



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while(i<=m) { i++; j=0; while(j<n) { j++; printf(" "); } n--; j=0; while(j<((2*i)-1)) { j++; printf("*"); } printf("\n"); } //lower triangle n=1; p=0; i=0; while(i<m) { i++; j=0; while(j<n) { j++; printf(" "); } n++; j=p; while(j<((2*m)-1)) { j++; printf("*"); } p+=2; printf("\n"); } getch(); return 0; }



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Arrays and matrices

Initializing arrays 1- Initializing 1Darrays with user input

#include <stdio.h> #include <conio.h> int main (void) { int i; int a[5]; clrscr(); //initializing the array with zeros for(i=0;i<5;i++) { scanf("%i",&a[i]); } printf("\n\n"); //printing the initialized array for(i=0;i<5;i++) { printf("%i\n",a[i]); } getch(); return 0; }

2- Initializing 2Darrays with user input #include <stdio.h> #include <conio.h> int main (void) { int i,j; int a[3][3]; clrscr();



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//initializing the array with user input for(i=0;i<3;i++) { for(j=0;j<3;j++) { scanf("%i",&a[i][j]); } } printf("\n\n"); //printing the initialized array for(i=0;i<3;i++) { for(j=0;j<3;j++) { printf("%i\t",a[i][j]); } printf("\n"); } getch(); return 0; }

3- Initializing & printing 1Darrays with user input #include <stdio.h> #include <conio.h> int main (void) { int i; int a[10]; clrscr(); //printing the array without initializing it for(i=0;i<10;i++) { printf("%i\n",a[i]); } //initializing the array with zeros for(i=0;i<10;i++) { a[i] = 0; }



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//printing the initialized array for(i=0;i<10;i++) { printf("%i\n",a[i]); } getch(); return 0; }

4- Initializing & printing 2Darrays with user input #include <stdio.h> #include <conio.h> int main (void) { int i,j; int a[5][5]; clrscr(); //printing the array without initializing it for(i=0;i<5;i++) { for(j=0;j<5;j++) { printf("%i\t",a[i][j]); } printf("\n"); } //initializing the array with zeros for(i=0;i<5;i++) { for(j=0;j<5;j++) { a[i][j] = 0; } } //printing the initialized array for(i=0;i<5;i++) { for(j=0;j<5;j++)



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{ printf("%i\t",a[i][j]); } printf("\n"); } getch(); return 0; }

Initializing matrices

1- Initializing a 3x3 matrix antidaigonal #include <stdio.h> #include <conio.h> int main (void) { int i,j; int a[7][7]; clrscr(); //initializing the array with user input for(i=0;i<7;i++) { for(j=0;j<7;j++) { if((i+j)==6) a[i][j]=1; else a[i][j]=0; } } //printing the initialized array for(i=0;i<7;i++) { for(j=0;j<7;j++) { printf("%i\t",a[i][j]); } printf("\n"); }



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getch(); return 0; }

2- Initializing a 7x7 identity matrix

#include <stdio.h>

#include <conio.h>

int main (void)

{

int i,j;

int a[7][7];

clrscr();

//initializing the array with user input

for(i=0;i<7;i++)

{

for(j=0;j<7;j++)

{

if(i==j)

a[i][j]=1;

else

a[i][j]=0;

}

}

//printing the initialized array

for(i=0;i<7;i++)

{

for(j=0;j<7;j++)



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{ printf("%i\t",a[i][j]); }

printf("\n");

}

getch();

return 0;

}

3- Initializing a 7x7 matrix antidaigonal

#include <stdio.h>

#include <conio.h>

int main (void)

{

int i,j;

int a[7][7];

clrscr();


for(i=0;i<7;i++)

{

for(j=0;j<7;j++)

{

if((i+j)==6)

a[i][j]=1;

else

a[i][j]=0;

}

}




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for(i=0;i<7;i++)

{

for(j=0;j<7;j++)


printf("\n");

}

getch();

return 0;

}

4- Initializing a 7x7 matrix cross

#include <stdio.h>

#include <conio.h>

int main (void)

{

int i,j;

int a[7][7];

clrscr();


for(i=0;i<7;i++)

{

for(j=0;j<7;j++)

{

if(i==3 || j==3)

a[i][j]=1;

else

a[i][j]=0;



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}

}


for(i=0;i<7;i++)

{

for(j=0;j<7;j++)

{ printf("%i\t",a[i][j]);}

printf("\n");

}

getch();

return 0;

}

5- Initializing a 7x7 matrix full outergrid

#include <stdio.h>

#include <conio.h>

int main (void)

{

int i,j;

int a[7][7];

clrscr();


for(i=0;i<7;i++)

{

for(j=0;j<7;j++)

{

if(i==0 || j==0 || i==6 || j==6)



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a[i][j]=1;

else

a[i][j]=0;

}

}


for(i=0;i<7;i++)

{

for(j=0;j<7;j++)


printf("\n");

}

getch();

return 0;

}

6- Initializing a 7x7 matrix half outergrid

#include <stdio.h>

#include <conio.h>

int main (void)

{

int i,j;

int a[7][7];

clrscr();


for(i=0;i<7;i++)

{



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for(j=0;j<7;j++)

{

if(i==0 || j==0)

a[i][j]=1;

else

a[i][j]=0;

}

}


for(i=0;i<7;i++)

{

for(j=0;j<7;j++)


printf("\n");

}

getch();

return 0;

}

7- Initializing a 7x7 matrix tridaigonal

#include <stdio.h>

#include <conio.h>

int main (void)

{

int i,j;

int a[7][7];



45

clrscr();


for(i=0;i<7;i++)

{

for(j=0;j<7;j++)

{

if(i==j || i==(j+1) || i==(j-1))

a[i][j]=1;

else

a[i][j]=0;

}

}


for(i=0;i<7;i++)

{

for(j=0;j<7;j++)

{

printf("%i\t",a[i][j]);

}

printf("\n");

}

getch();

return 0;

}

8- Initializing a 7x7 matrix tridaigonal anti



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#include <stdio.h>

#include <conio.h>

int main (void)

{

int i,j;

int a[7][7];

clrscr();


for(i=0;i<7;i++)

{

for(j=0;j<7;j++)

{

if((i+j)==6 || (i+j)==5 || (i+j)==7)

a[i][j]=1;

else

a[i][j]=0;

}

}


for(i=0;i<7;i++)

{

for(j=0;j<7;j++)


printf("\n");

}

getch();



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return 0;

}

Matrix operations

1- Matrix scalar multiplication #include <stdio.h>

#include <conio.h>

int main (void)

{

int i,j,c;

int a[4][4], b[4][4];

clrscr();

//Taking input from user for matrix A

printf("Input row-wise the matrix to be scaled :\n");

for(i=0;i<4;i++)

{

for(j=0;j<4;j++)

{

scanf("%i",&a[i][j]);

}

}

//Value to be scaled with

printf("\nEnter the constant to scale the input matrix with : ");

scanf("%i",&c);

//Scaling matrix A i.e. B = cA

for(i=0;i<4;i++)

{

for(j=0;j<4;j++)

{

b[i][j] = a[i][j] * c;

}

}



48

printf("\n\nThe input matrix was\n\n");

//printing matrix A

for(i=0;i<4;i++)

{

for(j=0;j<4;j++)

{


}

printf("\n");

}

printf("\n\nThe ouput matrix is\n\n");

//printing matrix B

for(i=0;i<4;i++)

{

for(j=0;j<4;j++)

{

printf("%i\t",b[i][j]);

}

printf("\n");

}

getch();

return 0;

}

2- Matrix addition

#include <stdio.h>

#include <conio.h>

int main (void)

{

int i,j;

int a[4][4], b[4][4], c[4][4],d[4][4];



49

clrscr();


printf("Input matrix A row-wise : \n");

for(i=0;i<4;i++)

{

for(j=0;j<4;j++)

{


}

}

//Taking input from user for matrix B

printf("Input matrix B row-wise : \n");

for(i=0;i<4;i++)

{

for(j=0;j<4;j++)

{

scanf("%i",&b[i][j]);

}

}

//Adding the matrices i.e. C = A + B

for(i=0;i<4;i++)

{



50

for(j=0;j<4;j++)

{

c[i][j] = a[i][j] + b[i][j];

}

}

//Subtracting the matrices i.e. C = A - B

for(i=0;i<4;i++)

{

for(j=0;j<4;j++)

{

d[i][j] = a[i][j] - b[i][j];

}

}

printf("\n\nThe input matrix A is\n\n");

//printing matrix A

for(i=0;i<4;i++)

{

for(j=0;j<4;j++)

{


}

printf("\n");

}



51

printf("\n\nThe input matrix B is\n\n");

//printing matrix B

for(i=0;i<4;i++)

{

for(j=0;j<4;j++)

{


}

printf("\n");

}

printf("\n\nThe output matrix C is\n\n");

//printing matrix C

for(i=0;i<4;i++)

{

for(j=0;j<4;j++)

{

printf("%i\t",c[i][j]);

}

printf("\n");

}

printf("\n\nThe output matrix D is\n\n");

//printing matrix D

for(i=0;i<4;i++)

{



52

for(j=0;j<4;j++)

{

printf("%i\t",d[i][j]);

}

printf("\n");

}

getch();

return 0;

}

3- Matrix multiplication 3x3

#include <stdio.h>

#include <conio.h>

int main (void)

{

int i,j,k;

int a[3][3], b[3][3], c[3][3];

clrscr();


printf("Input row-wise matrix A :\n");

for(i=0;i<3;i++)

{

for(j=0;j<3;j++)

{


}



53

}


printf("Input row-wise matrix B :\n");

for(i=0;i<3;i++)

{

for(j=0;j<3;j++)

{


}

}

//Initializing matrix c to zero

//Extremely necessary step

for(i=0;i<3;i++)

{

for(j=0;j<3;j++)

{

c[i][j] = 0;

}

}

//Code for multiplication of matrices

//Multiplying matrices A and B i.e. C = A x B

for(i=0;i<3;i++)

{



54

for(j=0;j<3;j++)

{

for(k=0;k<3;k++)

{

c[i][j] += a[i][k] * b[k][j];

}

}

}


//printing matrix A

for(i=0;i<3;i++)

{

for(j=0;j<3;j++)

{


}

printf("\n");

}


//printing matrix B

for(i=0;i<3;i++)

{

for(j=0;j<3;j++)

{ printf("%i\t",b[i][j]); }



55

printf("\n");

}

printf("\n\nThe multiplied matrix C is\n\n");

//printing matrix B

for(i=0;i<3;i++)

{

for(j=0;j<3;j++)

{ printf("%i\t",c[i][j]); }

printf("\n");

}

getch();

return 0;

}


#include <stdio.h>

#include <conio.h>

int main (void)

{

int i,j,k;

int a[4][4], b[4][4], c[4][4];

clrscr();


printf("Input row-wise matrix A :\n");

for(i=0;i<4;i++)

{

for(j=0;j<4;j++)



56

{


}

}


printf("Input row-wise matrix B :\n");

for(i=0;i<4;i++)

{

for(j=0;j<4;j++)

{


}

}



for(i=0;i<4;i++)

{

for(j=0;j<4;j++)

{

c[i][j] = 0;

}

}



for(i=0;i<4;i++)

{



57

for(j=0;j<4;j++)

{

for(k=0;k<4;k++)

{

c[i][j] += a[i][k] * b[k][j];

}

}

}


//printing matrix A

for(i=0;i<4;i++)

{

for(j=0;j<4;j++)

{


}

printf("\n");

}


//printing matrix B

for(i=0;i<4;i++)

{

for(j=0;j<4;j++)

{


}



58

printf("\n");

}


//printing matrix B

for(i=0;i<4;i++)

{

for(j=0;j<4;j++)

{


}

printf("\n");

}

getch();

return 0;

}


#include <stdio.h>

#include <conio.h>

int main (void)

{

int i,j,k;

int a[8][8], b[8][8], c[8][8];

clrscr();

//Initializing matrix A

for(i=0;i<8;i++)

{



59

for(j=0;j<8;j++)

{

a[i][j] = i + j;;

}

}

//Initializing matrix B to an identity matrix

for(i=0;i<8;i++)

{

for(j=0;j<8;j++)

{

if(i==j)

b[i][j] = 1;

else

b[i][j] = 0;

}

}



for(i=0;i<8;i++)

{

for(j=0;j<8;j++)

{

c[i][j] = 0;

}



60

}



for(i=0;i<8;i++)

{

for(j=0;j<8;j++)

{

for(k=0;k<8;k++)

{

c[i][j] += a[i][k] * b[k][j];

}

}

}

printf("\n\nThe matrix A is\n\n");

//printing matrix A

for(i=0;i<8;i++)

{

for(j=0;j<8;j++)

{


}

printf("\n");

}

printf("\n\nThe matrix B is\n\n");

//printing matrix B

for(i=0;i<8;i++)



61

{

for(j=0;j<8;j++)

{


}

printf("\n");

}


//printing matrix B

for(i=0;i<8;i++)

{

for(j=0;j<8;j++)

{


}

printf("\n");

}

getch();

return 0;

}



62

Nested loops 1- Nested for loop

#include <stdio.h>

#include <conio.h>

int main (void)

{

int i,j,k;

clrscr();

for(i=0;i<3;i++)

{

printf("Hello A\t");

for(j=0;j<3;j++)

{

printf("Hello B\t");

for(k=0;k<3;k++)

{

printf("Hello C\t");

}

}

}

getch();

return 0;

}



63

2- Nested while loop

#include <stdio.h>

#include <conio.h>

int main (void)

{

int i=0,j=0,k=0;

clrscr();

i=0;

while(i<3)

{

i++;


j=0;

while(j<3)

{

j++;


k=0;

while(k<3)

{

k++;


}

}

}



64

getch();

return 0;

}

3- Nested while test1

#include <stdio.h>

#include <conio.h>

int main (void)

{

int i=0,j=0,k=0;

clrscr();

i=0;

while(i<3)

{

i++;


j=0;

while(j<3)

{

j++;


//k=0 line removed

while(k<3)

{

k++;


}



65

}

}

getch();

return 0;

}


#include <stdio.h>

#include <conio.h>

int main (void)

{

int i=0,j=0,k=0;

clrscr();

i=0;

while(i<3)

{

i++;


//j=0 line removed

while(j<3)

{

j++;


k=0;

while(k<3)

{



66

k++;


}

}

}

getch();

return 0;

}


#include <stdio.h>

#include <conio.h>

int main (void)

{

int i=0,j=0,k=0;

clrscr();

i=0;

while(i<3)

{

i++;


//j=0 line removed

while(j<3)

{

j++;


//k=0 line removed



67

while(k<3)

{

k++;


}

}

}

getch();

return 0;

}

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Important Programs in c

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