meta function,
boost mpl,
boost::common_factor库,
compile time:
template <unsigned int x, unsigned int y, bool is_ordered = (x >= y)> struct static_gcd { static int const value = static_gcd<y, x % y>::value; }; template <unsigned int x, unsigned int y> struct static_gcd<x, y, false> { static int const value = static_gcd<y, x>::value; }; template <unsigned int x> struct static_gcd<x, 0, true> { static int const value = x; }; template <unsigned int x> struct static_gcd<x, 1, true> { static int const value = 1; }; int main() { std::cout << static_gcd<24, 32>::value << '\n'; std::system("PAUSE"); }
转载于:https://www.cnblogs.com/prajna/archive/2013/02/26/2934410.html
相关资源：数据结构—成绩单生成器