WA in FCTRL2

[geekakj]

I am getting WA in FCTRL2.Please help in pointing out the error in the following source code:

#include <iostream>
using namespace std;
long int fact(int n)
{
   if(n==1)
      return 1;
   return (n*(fact(n-1)));
}
int main()
{
   int num = 0;
   int i=0;
   int a[100] = {0};
   cin>>num;
   for(;i<num;i++)
      cin>>a[i];
   for(i = 0;i < num;i++)
   {
      cout<<fact(a[i])<<endl;
   }
   return 0;
}