从键盘输入时.分.秒（第二章第一题）

#include<iostream>using namespace std;class Time{public:int hour;int minute;int sec;};Time t;void set_time(void){cin>>t.hour;cin>>t.minute;cin>>t.sec;}void show_time(void){cout<<t.hour<<":"<<t.minute<<":"<<t.sec<<endl;}int main(){set_time();show_time();return 0;}