while(1)
     {
         if((hongwaizuo==0)&&(hongwaiyou!=0))
         {
              delayxms(2);
              if((hongwaizuo==0)&&(hongwaiyou!=0))
              {
            
              a=40;
              delayxms(30);
              a=46;
              delayxms(30);
            
              }
        while(hongwaizuo!=0)
          {
                  delayxms(30);
                a=33;
              };   
          }
这段程序中的a=40,a=46只要if中的条件满足就会一直循环，怎样能让他满足时只循环一次呢？？

试过，这样会循环那三个

恩恩，已经解决了，谢谢你