6.1.2 switch条件语句.html

javascript即用即差核心对象手册

<script>
 var scroe=window.prompt("请输入成绩：","80");
 getInfo(parseInt(scroe));
 function getInfo(score)
 {
    if(scroe<0 || scroe>100)
	    {
		   document.write("输入成绩不合法，请重新输入！");
		   return;
		}
	switch(Math.floor(score/10))
	{
       case 0:
	   case 1:
	   case 2:
	   case 3:
	   case 4:
	   case 5:
	      document.write("不及格，需要继续努力！");break;
	   default:
	        switch(Math.floor(score/10))
			{
			   case 7:
			      document.write("成绩中等，有待提高");break;
			   case 8:
			      document.write("成绩良好，继续保持");break;
			   case 9:
			      document.write("成绩优秀，绝好学生");break;
			   case 10:
			      document.write("你太强了，佩服佩服");break;
			}
	}
 }
</script>