Question

C program that Accept a num
12345678
Find sum of digits at even places and check whether the sum is prime or not
7+5+3+1=16

Answer 1

Answer:

/**

* C program to find sum of its digits of a number

*/

#include <stdio.h>

int main()

{

   int num, sum=0;

   /* Input a number from user */

   printf("Enter any number to find sum of its digit: ");

   scanf("%d", &num);

   /* Repeat till num becomes 0 */

   while(num!=0)

   {

       /* Find last digit of num and add to sum */

       sum += num % 10;

       /* Remove last digit from num */

       num = num / 10;

   }

   printf("Sum of digits = %d", sum);

   return 0;

}