用c语言编写的电子通讯录，很有用，大家可以尝试下载使用-c language used in the preparation of electronic correspondence, very useful, you can try downloading

用C语言编写的自动报警系统的程序。程序是随书光盘中的内容，详细可靠！-The program for automatic alarm system based on C. The program is the content of CD attached with books, detailed and reliable!

电子商务网站。C#语言与.net结合构造编写成。-E-commerce site. C# language and. Net combined structure written into.