how to write program in cpp find the sum of either of the diagonals of a 4 x 4 matrix

Hello friends, Welcome to your Techgsr.co blog. And today in this article we will learn about how to write program in cpp find the sum of either of the diagonals of a 4 x 4 matrix .So let’s go to our topic

#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.
INPUT :
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
OUTPUT :
Sum of either of the diagonal elements is : 34

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