Question

c program to input diagonal matrix
and find sum of diagonal elements

Answer 1

Answer:

#include <stdio.h>

#include <conio.h>

int main() {

int mat[3][3];

int i, j, sum = 0, input;

// initialise the matrix with 0

for(i = 0; i < 3; i++)

for(j = 0; j < 3; j++)

mat[i][j] = 0;

// get input

printf("Enter the three numbers in the diagonal of the matrix:\n);

for(i= 0; i < 3; i++) {

scanf("%d", &input);

mat[i][i] = input;

sum += input;

}

// display matrix

printf("Matrix inputted:\n);

for(i = 0; i < 3; i++) {

for(j = 0; j < 3; j++)

printf("%d\t" ,mat[i][j]);

pritnf("\n");

}

// show sum of diagonal

printf("Sum of diagonal is %d", sum);

// use getch if you are on turbo c++

getch();

return 0;

}