求 可以播放音乐的4*4单片机电子琴的程序 ,最好是C语言的,用P37接喇 ...答:include <AT89X51.H> //电子琴的程序 define keyport P1 //矩阵键盘接口 define speaker P3_7//蜂鸣器 define segdisplay P0 //数码管显示 unsigned char code table[]={0x40,0x79,0x24,0x30,0x19,0x12,0x02,0x78,0x00,0x10 ,0x08 ,0x03,0x46,0x21,0x06 ,0x0e //共阳极数码管...