/*  factrec.c  */

#include <stdio.h>

int fact(int n)
{
    if (n <= 1) return 1;
    return fact(n - 1) * n;
}

int main(void)
{

    int n,f;

    n=10;

    f=fact(n);

    printf("%d! = %d\n",n,f);

    return 0;
}