#include <stdio.h>

int multimes(int n) {
    int i = n;
    int result = 1;
    if (n < 0) goto wow;
loop:
    result *= i;
    i--;
    if( i > 0 ) goto loop;
    goto ret;
wow:
    printf("What... You've Jumped here! Your value %d is not appropriate.", n);
ret:    
    return result;
}

int main(){
    int a = 10, b = 5, c = -1;
    printf("%d, %d, %d", multimes(a), multimes(b), multimes(c));
    return 0;
}