定时器实现钟表（重点：运算符重载）

1.定义TimerClass类，注意下方代码中运算符++的重载

public class TimerClass { /// <summary> /// 小时 /// </summary> private int _hours; /// <summary> /// 分钟 /// </summary> private int _minutes; /// <summary> /// 秒钟 /// </summary> private int _seconds; /// <summary> /// 无参构造方法 /// </summary> public TimerClass() { this._hours = 0; this._minutes = 0; this._seconds = 0; } /// <summary> /// 有参数构造方法，初始化时间 /// </summary> /// <param name="hours"></param> /// <param name="minutes"></param> /// <param name="seconds"></param> public TimerClass(int hours, int minutes, int seconds) { this._hours = hours; this._minutes = minutes; this._seconds = seconds; } /// <summary> /// 小时属性 /// </summary> public int Hours { get { return this._hours; } } /// <summary> /// 分钟属性 /// </summary> public int Minutes { get { return this._minutes; } } /// <summary> /// 秒钟属性 /// </summary> public int Seconds { get { return this._seconds; } } /// <summary> /// ++运算符的重载 /// </summary> /// <param name="time"></param> /// <returns></returns> public static TimerClass operator ++(TimerClass time) { time._seconds++; if (time._seconds >= 60) { time._minutes++; time._seconds = 0; if (time._minutes >= 60) { time._hours++; time._minutes = 0; time._seconds = 0; if (time._hours >= 24) { time._hours = 0; time._minutes = 0; time._seconds = 0; } } } return new TimerClass(time._hours, time._minutes, time._seconds); } }

2.this.timer++(timer为TimerClass类的一个实例，但调用重载的静态运算符方法并不用类型名而是实例名)

/// <summary> /// 时间跳动 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void timer1_Tick(object sender, EventArgs e) { this.timer++; this.lblTimeRun.Text = "时钟每秒跳动："+timer.Hours+":"+timer.Minutes+":"+timer.Seconds; }