階乘函式n！

#include "stdafx.h"

#include "iostream"

using namespace std ;

int factorial(int n)

if(0 ==n)

return 1;

else r

eturn n*factorial(n-1);

int main(int argc, char* argv)

int factorialnumber,factorialresult;

cout<<"please input the number of factorial"

cin>>factorialnumber;

factorialresult = factorial(factorialnumber);

cout<<"the result ou factorial:";

cout}

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