C program to find the sum of a digits of a given number

#include <stdio.h>
#include <conio.h>
void main()
{
  int a,b,c=0;
  clrscr();
  printf("\n Enter any number: ");
  scanf("%d",&a);
  while(a!=0)
  {
    b=a%10;
    a=a/10;
    c=b+c;
  }
  printf("sum of individual digits= %d",c);
  printf("\n\n Thanks For Visiting");
  printf("\n www.information-technology008.blogspot.in");
  getch();
}

Input: 
             Enter any number: 567
Output:
           sum of individual digits= 18