4个按键控P2流水，不同的按键可控制灯亮的顺序。

#include"AT89X51.H" void kDelay(unsigned int DT ) { unsigned int j; for(;DT>0;DT--) {for(j=0;j<150;j++);} } void main(void) { const unsigned char b[5]={0x7F,0xDF,0xF7,0xFD,0x55}; unsigned char c[5]={0xFE,0xFB,0xEF,0xBF,0xAA}; unsigned char d[32]={0xFF,0xFE,0xFD,0xFB,0xF7,0xEF,0xDF,0xBF, 0x7F,0x7F,0xBF,0xDF,0xEF,0xF7,0xFB,0xFD, 0xFE,0xFE,0xFF,0xFE,0xFC,0xF8,0xF0,0xE0, 0xC0,0x80,0x0,0xE7,0xDB,0xBD,0x7E,0xFF}; unsigned int i; if(P3_0==0) { for(i=0;i<5;i++) { kDelay(200); P2=b[i]; } } else if(P3_1==0) { for(i=0;i<5;i++) { kDelay(200); P2=c[i]; } } else if(P3_2==0) { for(i=0;i<32;i++) { kDelay(100); P2=d[i]; } } else if(P3_3==0) { while(1) { for(i=0;i<5;i++) { kDelay(200); P2=b[i]; if(P3_0==0) break; } for(i=0;i<5;i++) { kDelay(200); P2=c[i]; if(P3_1==0) break; } for(i=0;i<32;i++) { kDelay(100); P2=d[i]; if(P3_2==0) break; } } } P2=0xff; }