guess3.c

来自「这是HOLTEK HT 48系列单片机应用实例」· C语言 代码 · 共 19 行

unsigned int a,b;
int scan()
{
 while(1)
 {
  for(a=0x30;a<0x39;a++)
  {
  b=check_key();
  if(a == b)
  break;
  }
 if(a == b)
 break;
 }
 while(a == b)
  b=check_key();
return a;
}