书籍《单片机语言C51程序设计代码》中的代码，很好的学习代码，里面有贪吃蛇游戏，飞机游戏，多级菜单设计，要求学习者有一定的基础-Books the microcontroller programming language C51 code of the code, very good learning code, and there are snake game, the game, multilevel menu design, requires learners have certain f