//-------------------------------------------------------
void main(void) //主函数
  { 
    DDRA = 0xff; PORTA = 0xff;
    DDRD = 0xff; PORTD.5 = 1;  
    while(1)//循环
       {
         if(PIND.5 != 1) //按下了PD5键?
         delay_ms(5);
         if(PIND.5 != 1)
           {
              display();
              count ++; //数加1
              if(count == 10000) //是否计满了1万?
              count = 0; //清零
            }
         display();
       }
  }