這是程序：
#include <stc12c52xx.h>
sbit b_1=P3^4;
sbit b_2=P3^5;
sbit b_3=P3^3;
sbit S3=P3^2;
unsigned char code a[]={0xFA,0x82,0xD9,0xCB,0xA3,0x6B,0x7B,0xC2,0xFB,0xEB};
unsigned char q,w=1,e=1,r=1;
void time0()interrupt 1
{TH0=0xea;
switch(q)
{case 0:b_3=0;P1=w；b_1=1;q++;break;
case 1:b_1=0;P1=e；b_2=1;q++;break;
case 2:b_2=0;P1=r；b_3=1;q=0;break;}}
main()
{P1M0=0xff;
TMOD=0x0l;
ET0=1;
EA=1;
TR0=1;
while(1);
}
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