0611 switch判斷

<?php
$a = 90;
$b = intval($a / 10);  // intval() 取整數

switch($b){
      case 10:
         echo "A+";
         break;
      case 8:
      case 9:
         echo "A";
         break;
      case 7:
         echo "B";
         break;
      case 6:
         echo "C";
         break;
      default:
         echo "D";
}
?>