using System;
using System.Collections.Generic;
using System.Text;
namespace test
{class Program{static void Main(string[] args){Date birthday = new Date(1999, 11, 11, new Time(16, 33, 22));//传入的第四个参数是对象Console.WriteLine("我出生于{0}年{1}月{2}日{3}", birthday.year, birthday.month, birthday.day, birthday.clock.To24());//调用第四个对象的方法
        }}class Time{private int hour;private int minute;private int second;private void SetTime(int h, int m, int s){Hour = h;//属性赋值Minute = m;//属性赋值Second = s;//属性赋值
        }public Time()//无参构造函数
        {SetTime(0, 0, 0);}public Time(int hourvalue)//一参构造函数
        {SetTime(hourvalue, 0, 0);}public Time(int hourvalue, int minutevalue, int secondvalue)//三参构造函数
        {SetTime(hourvalue, minutevalue, secondvalue);}public int Hour//属性赋值
        {set { hour = (value >= 0 && value <= 24 ? value : 0); }get { return hour; }}public int Minute//属性赋值
        {set { minute = (value >= 0 && value <= 60 ? value : 0); }get { return minute; }}public int Second//属性赋值
        {set { second = (value >= 0 && value <= 60 ? value : 0); }get { return second; }}public string To24()//显示24小时制方法
        {string output = Hour + ":" + Minute + ":" + Second;return output;}public string To12()//显示24小时制方法
        {string output;if (Hour >= 12){output = Hour % 12 + ":" + Minute + ":" + Second + "PM";}else{output = Hour % 12 + ":" + Minute + ":" + Second + "AM";}/*下面也是可以的int HOURTEMP = (Hour == 0 || Hour == 12) ? 00 : （Hour % 12）;string PMAM = (Hour < 12) ? "AM" : "PM";string output1 = HOURTEMP + ":" + Minute + ":" + Second + PMAM;*/return output;}}class Date{public int year;public int month;public int day;public Time clock;//对象定义为成员public Date(int yearvalue, int monthvalue, int dayvalue, Time clockvalue){year = yearvalue;month = monthvalue;day = dayvalue;clock = clockvalue;}}
}