类初学

#include<iostream>using namespace std;class Time{    public:        void set_time();        void show_time();    private:        int hour;        int minute;        int sec;};int main(){    Time t1,t2;    t1.set_time();    t1.show_time();    t2.set_time();    t2.show_time();    return 0;}void Time::set_time(){    cin>>hour;    cin>>minute;    cin>>sec;}void Time::show_time(){    cout<<hour<<":"<<minute<<":"<<sec<<endl;}输入 10 20 30输出 10：20：30