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Old 09-03-2011, 12:26 AM
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M.Arsalan Qureshi

 
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Default Program to find the sum of either of the diagonals of a 4 x 4 matrix

Program to find the sum of either of the diagonals of a 4 x 4 matrix


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

void main()
{
clrscr();
int x;
int A[4][4],sum=0; //Reading the matrix.
cout << "Enter the elements of the matrix : " << endl;
for(int y=0;y<4;y++)
for (int x=0;x<4;x++)
{
cout << "Element " << x+1 << ", " << y+1 << " : ";
cin>>A[x][y];
}
//Sum of either of the diagonal elements.
for(x=0;x<4;x++)
for(y=0;y<4;y++)
if(x==y)
sum+=A[x][y];
else if(y==4-(1+1));
sum+=A[x][y];
cout << "Sum of either of the diagonal elements is : " << sum;
getch();
}
This program takes in the elements A[x][y] of the 4 x 4 matrix as a screen input from the user.
It then calculates the sum of either of its diagonals and outputs it using the 'cout' command.



Sample Input
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Sample Output
Sum of either of the diagonal elements is : 34

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