C++ 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.

OUTPUT

Sum of either of the diagonal elements is : 34
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