الأجوبة
/*Write a program in C to find the sum of left diagonals of a matrix*/
#include <stdio.h>
void main()
{
int i,j,arr1[50][50],sum=0,n,m=0;
printf("\n\nFind sum of left diagonals of a matrix :\n");
printf("---------------------------------------\n");
printf("Input the size of the square matrix : ");
scanf("%d", &n);
m=n;
printf("Input elements in the first matrix :\n");
for(i=0;i<n;i++)
{
for(j=0;j<n;j++)
{
printf("element - [%d],[%d] : ",i,j);
scanf("%d",&arr1[i][j]);
}
}
printf("The matrix is :\n");
for(i=0;i<n;i++)
{
for(j=0;j<n ;j++)
printf("% 4d",arr1[i][j]);
printf("\n");
}
// calculate the sum of left diagonals
for(i=0;i<n;i++)
{
m=m-1;
for(j=0;j<n ;j++)
{
if (j==m)
{
sum= sum+arr1[i][j];
}
}
}
printf("Addition of the left Diagonal elements is :%d\n",sum);
}