使用turbo C写的多级菜单程序，主要用了函数指针，使程序简洁易懂，容易管理-use of written procedures for multi-level menu, the main function of the target process, easy to read, easy to manage

菜单项的创建和主要响应函数的源代码程序，具有很大的参考价值-Menu item creation and main response function source code procedures, is a great reference value