51单片机实现4*5矩阵键盘C语言编程，采用反接扫描法。-51 MCU 4* 5 matrix the keyboard C language programming, reverse scan method.

关于两路交通灯的C语言编程，可以通过改变参数来控制红、绿、黄灯的亮灭时间-A two-way traffic lights of the C programming language, can be light off time by changing the parameters to control red, green, yellow light

类似于机房常用的磁盘保护卡，本程序只是通过软件的方式实现了各个分区的磁盘保护，和数据还原。开发环境配置比较复杂，需要有点耐心，这主要涉及到驱动编程等相关内容。请根据你自己选择的VS版本来选择相应的WTL和winDDK。实现语言选择的是C++；(The function of this program is similar to that of disk protection card which be used in the computer lab. This program is to ac

多本C语言参考书中都提到的编程软件，绝对经典。（基于DOS的）(Many C language reference books are mentioned in the programming software, absolutely classic. (based on DOS))