1 #include
     
       2  3  4 #define unint unsigned int 5 #define unchar unsigned char 6  7 sbit k=P3^2; 8 sbit L=P1^0; 9 10 unint a=1,b=1,c=1,d=1,s=0;11 unchar code table[]={
   0xc0,0xf9,0xa4,0xb0,12                         0x99,0x92,0x82,0xf8,13                             0x80,0x90};14 15 16 void delay(unint x)17 {18     unint i,j;19     for(i=121;i>0;i--)20         for(j=0;j<=x;j++);21 }22 23 void main()24 {25        L=0;26     P2=0x0f;27     P0=table[0];28     IT0=0;29     EA=1;30     EX0=1;31     while(1);32     33 }34 35 void cut_num(void)36 {37     if(s==10000)38         s=0;39     d=s%10;40     c=(s/10)%10;41     b=(s/100)%10;42     a=(s/1000)%10;43 }44 void print_num()45 {    46     delay(1);47     P2=0x08;48     P0=table[d];49     if((a!=0)||(b!=0)||(a==0&&b==0&&c!=0))50     {51         delay(1);52         P2=0x04;53         P0=table[c];54     }55     if(a!=0||(a==0&&b!=0))56     {57         delay(1);58         P2=0x02;59         P0=table[b];60     }61     if(a!=0)62     {63         delay(1);64         P2=0x01;65         P0=table[a];66     }67 }68 void int0()interrupt 069 {70       71         s++;72         cut_num();73         delay(300);74         while(k==0)75             print_num();76         while(k!=0)77             print_num();78                 79          80     }