‘C’ program to calculate the sum of diagonal elements of matrix.
C File => /* Write a ‘C’ program to read a matrix and calculate the sum of its diagonal elements. */ #include<stdio.h> int main() { int mat[30][30],sum=0,i,j,m,n; printf("\n Enter how many rows?"); scanf("%d",&m); printf("\n Enter how many cols?"); scanf("%d",&n); printf("\n Input matrix"); for(i=0;i<m;i++) { for(j=0;j<n;j++) { printf("\n Enter element %d%d",i+1,j+1); scanf("%d",&mat[i][j]); } } printf("\n\n Given matrix is\n"); for(i=0;i<m;i++) { for(j=0;j<n;j++) { printf("%d\t",mat[i][j]); ...