单片机-延迟显示0

#include<reg51.h>
char xianshima[2]={0xc0,0xf9};

void delay(int i)
{
 while(i--)
 {
 
 ;
 }
 
}

void main()
{
 int j;
 while(1)
{
  for(j=0;j<=1;j++)
  {
   P2=xianshima[j];
   delay(50000);
   }
}
}