这是我学习《网络应用编程》中练习时编的控制台程序，通过屏显菜单，把里面各个控制台的例子综合到一个项目中，方便大家学习、复习巩固用。-This is my learning " network application programming" code of practice in the console program, through the on-screen menu, the inside of each case integrated into a console p