说明：  C语言编写pic16f887单片机多通道采集的程序，开发环境MPLAB 8.7，实践验证成功，可以用到同系列单片机上。
(The program of C language with PIC16F887 microcontroller, usede for multi-channels A/D, development environment MPLAB 8.7, and has been proved successful.)