#define uchar unsigned char
#define uint unsigned int
#include <reg52.h>

sbit ring = P3^7;

//延时

void delay(unsiged int)
   {
   int i j;
   for(j=0;j<n;j++)

   for{i=0;i<125;i++}
      {;}
    }
    //主函数
   void main(void)
     {
               while(1)
          {
             delay(4);  
             ring=0;
             delay(4);
             ring=1;
           }
      }
/*这个程序为什么显示"010" - 0 Error(s), 2 Warning(s).*/