Calculating the sum of digits of a number in C

#include<stdio.h>
#include<conio.h>
int main()
{
  int n,num,x,sum=0;
  printf("Enter a number=");
  scanf("%d",&n);
  while(n>0)
  {
x=n%10;
sum=sum+x;
n=n/10;
  }
printf("Sum of digits of a number=%d",sum);
getch();
return 0;
}