Arrays c4 c5
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Pascal Programming Language Omar ElSabek & Fayez G hazzawi IT Engineering 3 th year – UNKNOWN Department
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Transcript of Arrays c4 c5
Pascal Programming Language
Omar ElSabek & Fayez GhazzawiIT Engineering3th year – UNKNOWN Department
Arrays
The Array is a powerful data structure that stores variable data having the same data type. It is just like a small fixed number of boxes linked together one after the other storing things that are related to each other. An array is said to be a static data structure because, once declared, its original size that is specified by the programmer will remain the same throughout the whole program and cannot be changed.
so the Array
is a locations collection for data storage, every location named “Item” and every item has a specific value ,and the array has a specific type.
Program Lesson1_Program1 (input,output);
Var
myArray : array [x..y] of type;
Begin
…………
End.
Program Lesson1_Program1 (input,output);
Type
myArray = array [x..y] of type;
Var
A , B : myArray;
Begin
…………
End.
Program Lesson1_Program1 (input,output);
Type
myintArray = array [1..9] of integer;
Var
A : myintArray;
mycharArray : array [1..26] of char;
Begin
…………
End.
Filling the Array
After we define our array ..
Now we’re filling it ^_^
We can fill the array in two ways:
• Initialize in Compile Time
• Read from the keyboard in Run Time
Program Lesson1_Program1 (input,output);
Var
A : array [1..10] of integer ;
Begin
A[1] := 9; A[2] := 8; A[3] := 7; ……
End.
Program Lesson1_Program1 (input,output);
Var
A : array [1..10] of integer ;
Begin
read(A[1]); read(A[2]); read(A[3]); ……
End.
How Can I Fill The Whole Items in my Array ???
Remember The Loop Statements :D
Program Lesson1_Program1 (input,output);
Var
myintArray : array [1..9] of integer;
i : integer;
Begin
for i:=0 to 9 do
myintArray[i] := i+10;
for i:=0 to 9 do
write (myintArray[i] , “ , “);
End.
Run Time Error … why ?
Program Lesson1_Program1 (input,output);
Var
myintArray : array [-10..-1] of integer;
i : integer;
Begin
for i:=-10 to -1 do
myintArray[i] := i+10;
for i:=-10 to -1 do
write (myintArray[i] , “,“);
End.
0,1,2,3,4,5,6,7,8,9,
Program Lesson1_Program1 (input,output);
Var
myintArray : array [-10..-1] of integer;
i : integer;
Begin
for i:=1 to 10 do
myintArray[i] := i+10;
for i:=1 to 10 do
write (myintArray[i] , “,“);
End.
Run Time Error … why ?
Program Lesson1_Program1 (input,output);
Var
myintArray : array [1..10] of integer;
i : integer;
Begin
for i:=1 to 3 do
myintArray[i] := i;
for i:=1 to 10 do
write (myintArray[i] , ‘,’);
End.
1,2,3,0,0,0,0,0,0,0,
Program Lesson1_Program1 (input,output);
Const n = 10
Var
myintArray : array [1.. n] of integer;
x,i : integer;
b : boolean;
Begin
readln(x);
b := false;
for i:=1 to n do
if (myintArray[i] = x) then
b := true;
writeln(b);
End.
Program Lesson1_Program1 (input,output);
Const n = 10
Var
myintArray : array [1.. n] of integer;
x,i : integer; b : boolean;
Begin
for i:=1 to n do
for j:= i+1 to n do
if (myintArray[i] > myintArray[j]) then
begin
x := myintArray[i];
myintArray[i] := myintArray[j];
myintArray[j] := x;
end;
for i:=1 to 10 do
write (myintArray[i] , ‘,’);
End.
Two Dimensions Array (Matrix)
The Two Dimensions Array (Matrix)
is a Square Array that has rows
and columns .
my2DArray : Array[1..5 , 1..5] of integer;
Program Lesson1_Program1 (input,output);
Var
myMatrix : array [x1..x2,y1..y2] of type;
Begin
…………
End.
Program Lesson1_Program1 (input,output);
Type
myMatrix = array [x1..x2,y1..y2] of type;
Var
A , B : myMatrix;
Begin
…………
End.
Filling the Matrix
After we define our matrix ..
Now we’re filling it ^_^
We can fill the array in two ways:
• Initialize in Compile Time
• Read from the keyboard in Run Time
Program Lesson1_Program1 (input,output);
Var
A : array [1..10,1..10] of integer ;
Begin
A[1,1] := 9; A[1,2] := 8; A[1,3] := 7; ……
A[2,1] := 6; A[2,2] := 5; A[2,3] := 4; ……
……
End.
Program Lesson1_Program1 (input,output);
Var
A : array [1..10] of integer ;
Begin
read(A[1,1]); read(A[1,2]); read(A[1,3]); ……
read(A[2,1]); read(A[2,2]); read(A[2,3]); ……
……
End.
In Order To Fill The Whole Matrix
As Same As ArraysThe Loop Statements are the BEST :D
Program Lesson1_Program1 (input,output);
Var
a: array [1..3, 1..3] of integer;
i,j : integer;
begin
for i:=1 to 3 do
begin
for j:=1 to 3 do
a[i,j]:= i;
end;
End.
Program Lesson1_Program1 (input,output);
Var
a: array [1..3, 1..5] of integer;
i,j : integer;
begin
for i:=1 to 3 do
begin
for j:=1 to 5 do
a[i,j]:= i;
end;
End.
What is the output ? :D
11111
22222
33333
Program Lesson1_Program1 (input,output);
Var
a: array [1..3, 1..5] of integer;
i,j : integer;
begin
for i:=1 to 3 do
for j:=1 to 5 do
a[i,j]:= i;
for i:=1 to 3 do
begin
for j:=1 to 5 do
writeln(a[i,j] ,’ ’);
writeln;
end;
End.
Program Lesson1_Program1 (input,output);
Const n = 100;
Var
myintMatrix : array [1..n,1..n] of integer;
x, i,j : integer;
Begin
readln(x);
for i:=1 to x do
for j:=1 to x do
readln (myintMatrix[i,j]);
for i:=1 to x do
writeln (myintMatrix[i,i]);
End.
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