#include<stdio.h>
#include<stdlib.h>
int main()
{
    int n =1;
    jay(n);
    printf("the num is %d",jay(99));
    getch();
    return 0;
}
 int jay(n)
    {
        if(n==100)
        {
            return 100;
         }
         return n * jay(n++);
    }