program for sum of digit of a number

#include<stdio.h>
#include<conio.h>
void main()
{
int n,i,t1,t2,sum=0;
clrscr();
printf("\n enter any number");
scanf("%d",&n );
while(n!=0)
{
t1=n%10;
sum=sum+t1;
n=n/10;
}
printf("%d",sum);
getch();
}