0-999所有的质数.txt

单片机写的程序都含有Protues仿真结果

#include<REG51.H>
#define	uchar unsigned char
#define	uint unsigned int
uint a=0,b=0,c=0,i,j;
uchar key,count;
uchar SG2[]={0X00,0X10,0X20,0X30,0X40,0X50};
uchar dispbuf[4];
sbit key1=P3^5;
sbit key2=P3^4;
sbit key3=P3^3;
delay(uint k)
{for(i=0;i<k;i++)
    {for(j=0;j<256;j++)
         {;}
    }
}
void main(void)  
{ 
 
 for(a=5;a<1000;a++)
 {  
  for(c=2;c<(a/2);c++)
   { key=a%c;
    if(key==0)
	break;}
	         
    if(key!=0)
	{  dispbuf[0]=a%10;
    dispbuf[1]=a%100/10;
    dispbuf[2]=a/100%10;
    dispbuf[3]=a/1000;
	for(b=0;b<40;b++)
	
     {  for(count=0;count<4;count++)
		  {	 P1=(dispbuf[count])|(SG2[count]);
             delay(2);
           }		  
	 }
	}
  }
}