这道C++题，不会解答，求详细解答过程

#include class Time{ friend int Diffence(const Time&,const Time&); friend void show(const Time&);public: Time(int h = 0, int m = 0, int s = 0): Hour(h), Minute(m), Second(s){ } static int timeToSecond(const Time&); static int timeBaseDiffence(const Time