C51单片机设计一个游客流量计数器（00-99），实现对游客人数的统计。

#include

#define uchar unsigned char
uchar code ledtab[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x40};//0-9
uchar scanled;
uchar disdat[6]={0,0,0,0,0,0};
uchar datin,datout,dath;
display()
{
disdat[0]=datin/10;
disdat[1]=datin%10;
disdat[2]=datout/10;
disdat[3]=datout%10;
disdat[4]=dath/10;
disdat[5]=dath%10;
}
void ext0isr() interrupt 0
{
datin++;
datin%=100;
dath=(datin-datout);
display();
}
void ext1isr() interrupt 2
{
if(dath>0)datout++;
dath=(datin-datout);
display();
}
void t1isr() interrupt 3	//显示
{
	TH1=0xec;
	TL1=0x78;
	P2=~(1<	P0=ledtab[disdat[scanled]];
	scanled++;
	scanled%=6;
}
main()
{
	TMOD=0x10;
	TH1=0xec;
	TL1=0x78;
	TR1=1;
	ET1=1;
	EX0=1;
	IT0=1;
	EX1=1;
	IT1=1;
	EA=1;
	while(1);
}