sample5.c

#include<stdio.h>
#define SIZE 3 // 3x3 matrix

int main()
{
    int A[SIZE][SIZE];
    int row, col, sum = 0;
    int DSum = 0;

    printf("Enter elements in matrix of size %dx%d: \n", SIZE, SIZE);
    for(row=0; row<SIZE; row++){
        for(col=0; col<SIZE; col++){
            scanf("%d", &A[row][col]);
        }
    }

    /* Calculate sum of elements of each row of matrix */
    for(row=0; row<SIZE; row++){
        sum = 0;
        for(col=0; col<SIZE; col++){
            sum += A[row][col];
        }

        printf("Sum of elements of Row %d = %d\n", row+1, sum);
    }
    
    for(row=0; row<SIZE; row++){
        sum = 0;
        for(col=0; col<SIZE; col++){
            sum += A[col][row];
        }

        printf("Sum of elements of Column %d = %d\n", row+1, sum);
    }



 	for(row = 0; row < SIZE; row++){
   		DSum = DSum + A[row][row];
  }
 	printf("\nThe diagonal sum =  %d", DSum );

 	return 0;
}