#include <stdio.h>
#include <stdlib.h>
#include <string.h>

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

int main()
{
	int n, len;
	char buf[128];

	printf("Please enter a number: ");
	fgets(buf, 128, stdin);
	printf("the factorial of that number is %d\n", factorial(atoi(buf)));

	printf("Please enter another number: ");
	scanf("%d", &n);
	printf("the factorial of that number is %d\n", factorial(n));

	return 0;
}