5/28 C++: class Time

#include <iostream>
using namespace std;

class Time{
    private:
        // 資料(變數部分)
        int hour;
        int minute;
        int second;

    public:
        // 功能(函式部分)

        // Constructor(建構式)
        Time(){
            hour = 0;
            minute = 0;
            second = 0;
        }

        Time(int h, int m, int s){
            setHour(h);
            setMinute(m);
            setSecond(s);
        }


        // Set/Get Method
        void setHour(int h){
            if( h >= 0 && h <= 23 ){
                hour = h;
            }
            else{
                cout << "錯誤訊息：小時設定錯誤" << endl;
                hour = 0; // 設定錯誤時，復原成預設值。
            }
        }

        void setMinute(int m){
            if( m >= 0 && m <= 59 ){
                minute = m;
            }
            else{
                cout << "錯誤訊息：分鐘設定錯誤" << endl;
                minute = 0; // 設定錯誤時，復原成預設值。
            }
        }

        void setSecond(int s){
            if( s >= 0 && s <= 59 ){
                second = s;
            }
            else{
                cout << "錯誤訊息：秒數設定錯誤" << endl;
                second = 0; // 設定錯誤時，復原成預設值。
            }
        }

        int getHour(){
            return hour;
        }

        int getMinute(){
            return minute;
        }

        int getSecond(){
            return second;
        }

        void print(){
            cout << hour << "時" << minute << "分" << second << "秒" << endl;
        }

        int diff(Time t2){
            return (hour - t2.hour) * 3600 + (minute - t2.minute) * 60 + (second - t2.second);
        }

        int cmpGreater(Time t2){
            if( hour > t2.hour ){
                return 1;
            }
            else if( hour < t2.hour){
                return 0;
            }
            else if( minute > t2.minute ){
                return 1;
            }
            else if( minute < t2.minute){
                return 0;
            }
            else if( second > t2.second ){
                return 1;
            }
            else{
                return 0;
            }

        }
};

int main(){
    //Time t1 = {9, 90000, 58};
    Time t1(9, 90000, 58);
    Time t2;
    /*t2.hour = 12;
    t2.minute = 800;
    t2.second = 0;
    */
    t2.setHour(12);
    t2.setMinute(800);
    t2.setSecond(0);

    t1.print();
    t2.print();
    cout << t2.diff(t1) << endl;
    cout << t2.cmpGreater(t1) << endl;
    cout << t1.getHour() << endl;

    return 0;
}