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js成绩奖惩例题
2022-06-27 07:20:00 【I am the sun?】
题目如下:
成绩在[90,100],奖励笔记本电脑
成绩在[75,89],奖励游戏一天
成绩在[60,74],奖励试题一套
成绩在[0,59],奖励辅导班补习
输错,这显示错误
代码如下:
<!--成绩在[90,100],奖励笔记本电脑
成绩在[75,89],奖励游戏一天
成绩在[60,74],奖励试题一套
成绩在[0,59],奖励辅导班补习
输错,这显示错误-->
<!DOCTYPE html>
<html lang="zh">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<meta http-equiv="X-UA-Compatible" content="ie=edge" />
<title>成绩决定奖惩</title>
<script type="text/javascript">
var grade = prompt("请输入你的成绩:");
if(grade > 100 || grade < 0 || isNaN(grade)){
alert("哪有成绩是 "+ grade +"的,走开");
}else if(grade >= 90){
alert("成绩 " + grade +"分,奖励一台笔记本电脑");
}else if(grade >= 75){
alert("成绩 " + grade +"分,奖励游戏一天");
}else if(grade >= 60){
alert("成绩 " + grade +"分,奖励试题一套");
}else{
alert("成绩才"+ grade +"分,奖励辅导班补习");
}
</script>
</head>
<body>
</body>
</html>
运行结果如下:









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