时间类：定义对象并输出特定时间

#include <iostream>
using namespace std;
class Time {
public:
    Time() : hour(0), minute(0), second(0) {}
    void setTime(int h, int m, int s) {
        hour = h;
        minute = m;
        second = s;
    } 
  void displayTime() const { 
     cout << (hour < 10 ? "0" : "") << hour << ":"
                  << (minute < 10 ? "0" : "") << minute << ":"
                  << (second < 10 ? "0" : "") << second << std::endl;
    }
private:
    int hour;
    int minute;
    int second;
};
int main() {
    Time t;
    int h,m,s;
    while(cin>>h>>m>>s){ 
      if((h>=0&&h<=23)&&(m>=0&&h<=59)&&(s>=0&&s<=59))//判断时间有效性
    {
    t.setTime(h,m,s); 
    t.displayTime();  
    }
    else
   {
   cout<<"输出的时间不符合二十四小时时间制"<<endl; 
  }
  } 
    return 0;
}