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7． C语言源程序

#include AT89X51.H>

unsigned char code table1[]={0x06,0x5b,0x4f,0x66,0x6d};

unsigned char code table2[]={0x78,0x79,0x38,0x38,0x3f};

unsigned char i;

unsigned char a,b;

unsigned char temp;

void main(void)

{

while(1)

{

temp=0xfe;

for(i=0;i5;i++)

{

if(P1_7==1)

{

P0=table1[i];

}

else

{

P0=table2[i];

}

P2=temp;

a=temp(i+1);

b=temp>>(7-i);

temp=a|b;

　　　　　for(a=4;a>0;a--)

for(b=248;b>0;b--);

}

}

}