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The author:(作者)qqpublished in(发表于) 2014/7/11 9:16:57 C#中goto语句的使用方法
C#中goto语句的使用方法goto语句属于无条件的跳转语句,因为C#允许在代码行加上标签,这样就可以用goto语句直接跳转到这些代码行上。该语句有其优缺点,优点在于可以方便地控制何时去执行指定代码;主要缺点在于过多地使用这个语句将很难读懂代码段。示例goto语句的使用通过使用goto语句跳出嵌套循环完成数字的查找,程序代码如下:using System;public class GotoTest1{static void Main(){int x = 200, y = 4;int count = 0;string[,] array = new string[x, y];for (int i = 0; i < x; i++)for (int j = 0; j < y; j++)array[i, j] = (++count).ToString();Console.Write("输出结果为:n输入查找的数字:");string myNumber = Console.ReadLine();for (int i = 0; i < x; i++){for (int j = 0; j < y; j++){if (array[i, j].Equals(myNumber)){goto Found;}}}// http://www.isstudy.comConsole.WriteLine("数字{0} 无法找到.", myNumber);goto Finish;Found:Console.WriteLine("数字{0} 存在.", myNumber);Finish:Console.WriteLine("结束查找.");Console.Read();}}按键运行程序,运行结果如图1所示。图1 goto语句完整程序代码如下:★★★★★主程序文件完整程序代码★★★★★using System;using System.Collections.Generic;using System.Text;namespace _3_13{class Program{static void Main(){int x = 200, y = 4;int count = 0;string[,] array = new string[x, y];for (int i = 0; i < x; i++)for (int j = 0; j < y; j++)array[i, j] = (++count).ToString();Console.Write("输出结果为:n输入查找的数字:");string myNumber = Console.ReadLine();for (int i = 0; i < x; i++){for (int j = 0; j < y; j++){if (array[i, j].Equals(myNumber)){goto Found;}}}Console.WriteLine("数字{0} 无法找到.", myNumber);// http://www.isstudy.comgoto Finish;Found:Console.WriteLine("数字{0} 存在.", myNumber);Finish:Console.WriteLine("结束查找.");Console.Read();}}}
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