factorial.cpp

来自「C++ sample code, for the book: C++ blac」· C++ 代码 · 共 22 行

#include <iostream>
using namespace std;

int factorial(int value);

int main()
{
    cout << "6! = " << factorial(6) << endl;           

    return 0;
}

int factorial(int value)
{
    if (value == 1) {
        return value;     
    } else {
        return value * factorial(value - 1);
    }
}