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#define uchar unsigned char #define uint unsigned int uchar code tab[]={
0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f}; sbit SPK=P3^7; sbit key1=P1^0; sbit key2=P1^1; uchar n,a,b; void delay(uchar z) {
uchar x,y; for(x=z;x>0;x--) for(y=110;y>0;y--); }void scan() {
if(key1==0) {
delay(5); if(key1==0) {
while(!key1); n++; if(n==100) n=0; }