51单片机 秒表设计 怎么用按键控制开始 停止和清零?答:sbit Y=P2^6;//停止按钮 sbit Z=P2^5;//清零按钮 int aa,temp;char table[10]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90};//共阳极 //char table[10]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};//共阴极 void delay(int x); //延迟函数...