八個流水燈隔燈閃爍，程序怎麽寫？

#include?

unsigned int LED;

unsigned int a,i,m;

void yiwei();

void delay(unsigned int b);

void main()

TMOD=0x01; ?//T0為方式1

TH0=(65536-50000)/256;

TL0=(65536-50000)%256; ? //初值

EA=1; ? //允許中斷

ET0=1;

while(1)

P2=0x00;

delay(2000);

LED = 0x7f;

m

=0;

for (i = 0 ;i < 8 ; i++)

{?

a=0;

TR0=1;

delay(100);

while(m);

delay(2000);

P2=0x00;

delay(2000);

LED = 0xfe;?

m=0;

for (i = 0 ;i < 8 ; i++)

a=1;

TR0=1;

delay(100);

while(m);

}

delay(2000); ? ? ?

}

}

void t0() interrupt 1 using 1

{ ?

TH0=(65536-50000)/256;

TL0=(65536-50000)%256;

m++;

if(m==20)

{

m=0;

yiwei(); ?

} ?

}

void yiwei()

{ ?

if(a==0)

{ ? ?

P2=LED;

LED = LED>>1; // 右移

LED = LED|0x80; ? ?

}

else

{ ? ?

P2 ?= LED;

LED = LED << 1; // 左移

LED = LED | 0x01; ?

}

}

void delay(unsigned int b)

{

unsigned char j;

for(b; b > 0; b--) //機器在這裏執行需要壹段時間 也就達到了延時效果

for(j = 255; j > 0; j--);

}

自己調試過，我12晶振