//programul calculeaza suma cifrelor unui numar natural : recursiv si iterativ
#include <stdio.h>
#include <conio.h>
/*
long int n;
int suma(long int n)
{
	if(!n) return 0;
  	else return n%10 + suma(n/10);
}
void main(void)
{
 clrscr();
 printf("n=");scanf("%ld",&n);
 printf("suma cifrelor lui %ld = %d\n",n,suma(n));
 getch();
*/
void main()
{
	long int n,x;
  int s;
  printf("n=");scanf("%ld",&n);
  s=0;
  x=n;
	while(x)
   {	s+=x%10;
      x/=10;
   }
 printf("suma cifrelor lui %ld = %d\n",n,s);
 getch();
}