3、多线程-两个线程交替打印 0~100 的奇偶数

题目

两个线程交替打印 0~100 的奇偶数

代码示例

using System;
using System.Threading;
using System.Threading.Tasks;

public class ZeroEvenOdd
{
	private int n = 100;
	private AutoResetEvent evenEvent = new AutoResetEvent(false);
	private AutoResetEvent oddEvent = new AutoResetEvent(true);

	public void PrintEven(Action<int> printNumber)
	{
		for (int i = 0; i <= n; i += 2)
		{
			evenEvent.WaitOne(); // 等待 even 事件
			printNumber(i); // 打印偶数
			oddEvent.Set(); // 唤醒 odd 线程
		}
	}

	public void PrintOdd(Action<int> printNumber)
	{
		for (int i = 1; i <= n; i += 2)
		{
			oddEvent.WaitOne(); // 等待 odd 事件
			printNumber(i); // 打印奇数
			evenEvent.Set(); // 唤醒 even 线程
		}
	}

	public static void Main(string[] args)
	{
		ZeroEvenOdd zeroEvenOdd = new ZeroEvenOdd();

		var evenTask = Task.Run(() => zeroEvenOdd.PrintEven(Console.Write));
		var oddTask = Task.Run(() => zeroEvenOdd.PrintOdd(Console.Write));

		Task.WaitAll(evenTask, oddTask);
		Console.WriteLine();
	}
}