我输入了一个 om（获得的分数），另一个输入了 mm（总分），我正在尝试计算百分比和等级。我得到了百分比分数的输出，但在编写 switch case 后无法得到成绩的输出。请检查代码并让我知道我的错误。
function perc() {
document.getElementById("perc").value= (document.getElementById("om").value/document.getElementById("mm").value)*100
var percentage=document.getElementById("perc").value
var grade;
switch(Math.floor(percentage/10)) {
case 9:grade="outstanding"
break;
case 8:grade="very good"
break;
case 7:grade="good"
break;
case 6:grade="improve well"
break;
case 5:grade="average"
break;
default:grade="fail"
break;
}
document.getElementById("grade").value=grade;<h1>percentage & grade calculator</h1>
MaxMarks:-<input type="text" id="mm"><br><br>
obtained marks:-<input type="text" id="om"><br><br>
<button type="button" onclick="perc()">SUBMIT</button><br><br>
percentage:-<input type:-"text" id="perc"><br><br>
Grade:-<input type="text" id="grade"><br><br>起初，在我编写了年级代码后，我得到了百分比的输出，但我没有得到任何输出
perc<html>
<head>
<title>percentage</title>
</head>
<script>
function perc() {
document.getElementById("perc").value = (document.getElementById("om").value / document.getElementById("mm").value) * 100
var percentage = document.getElementById("perc").value
var grade;
switch (Math.floor(percentage / 10)) {
case 9: grade = "outstanding"
break;
case 8: grade = "very good"
break;
case 7: grade = "good"
break;
case 6: grade = "improve well"
break;
case 5: grade = "average"
break;
default: grade = "fail"
break;
}
document.getElementById("grade").value = grade;
} // This is the missing bracket
</script>
<body>
<h1>percentage & grade calculator</h1>
MaxMarks:-<input type="text" id="mm"><br><br>
obtained marks:-<input type="text" id="om"><br><br>
<button type="button" onclick="perc()">SUBMIT</button><br><br>
percentage:-<input type:-"text" id="perc"><br><br>
Grade:-<input type="text" id="grade"><br><br>
</body>
</html>