cpp模板设计案例

模板实现阶乘

#include <iostream>
using namespace std;
template<int N>
struct Factorial {
    static const int value = N * Factorial<N-1>::value;
};
template<>
struct Factorial<0> {
    static const int value = 1;
};
int main() {
    cout << Factorial<5>::value;
    return 0;
}
//output:120