13+

来自「13例常用仿真电路」· 代码 · 共 37 行

#include <AT89X51.H> 
  
unsigned char code table1[]={0x06,0x5b,0x4f,0x66,0x6d}; 
unsigned char code table2[]={0x76,0x79,0x38,0x38,0x3f}; 
unsigned char i,j; 
unsigned char a,b; 
unsigned char temp; 
  
void main(void) 
{ 
  while(1) 
    { 
      temp=0xfe; 
     
      for(i=0;i<5;i++) 
        { 
          if(P1_7==1) 
            { 
              P0=table2[i]; 
            } 
            else 
              { 
                P0=table1[i]; 
              } 
          P2=temp;    
          a=temp<<(1); 
          b=temp>>(7); 
          temp=a|b; 
		  for(a=4;a>0;a--)
          for(b=248;b>0;b--) {} 
          P2=0xff;
        
        } 
    } 
}