#include <iostream>
using namespace std;
int factorial (int n)
{
int r;
if (n==1)
r=1;
else
r=n*factorial(n-1);
return r;
}
int _tmain(int argc, _TCHAR* argv[])
{
int h;
h=factorial(4);
cout << h <<emdl;
return 0;
}
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