本程序是4×4键盘的mega16采样子程序，本程序参考了它人的设计，现在已经在我的项目中使用，其最大的特点就是硬件简单，调试方便，大家不用动脑筋就搞定它了。-This procedure is a 4 × 4 keyboard mega16 sampling subroutine, the procedure with reference to the design of its people, is now in my project to use, its greatest feature