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Write a program to read an integer number and keep on adding the digits till we get a number with a single digit. For example, 7976 yields an output of 2 (7976 - - t 29 - - t 11 - - t 2).

For this, your main() function must call the function sumdigits(0) to solve the problem, and then print the final result.

I have solved this problem and the logic is correct, I am not getting any output When i give my input it just move to next line.

#include <stdio.h>

sumdigits(int x)
{
  int n = x;
  int y = 0;

  while(n>0) {
    y = y + n % 10;
    n = n / 10;
  }
  return y;
}

int main(void)
{
 int a;

 scanf("%d",&a);

 while(a>10) {
   a=sumdigits(a);
 }

 printf("%d",a);
}
user3692108
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1 Answers1

1

Problem is with this line

scanf("%d",a);

It should be

scanf("%d", &a);
//----------^  use &
Rohan
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