Program in c language to find sum of digits using recursion?

# include
void main()
{
int no,rem=0,sum=0,n; /*declaration*/
printf("Enter 2 digit number:");
scanf("%d",&no);
for(n=1;n<3;n++) /*conditions*/
{
rem=no%10; /*separation of digits using % and / */
sum=sum+rem;
no=no/10;
}
printf("sum=%d",sum);
}