用js编写要求输入班级人数,之后依次输入每个学生的成绩,最后打印出该班级总的成绩以及平均成绩。
时间: 2024-05-05 07:16:57 浏览: 16
```html
<!DOCTYPE html>
<html>
<head>
<title>班级成绩统计</title>
<meta charset="utf-8">
</head>
<body>
<h1>班级成绩统计</h1>
<p>请输入班级人数:</p>
<input type="number" id="num">
<button onclick="calculate()">计算</button>
<p id="total"></p>
<p id="avg"></p>
<script>
function calculate() {
var num = parseInt(document.getElementById("num").value);
var total = 0;
for (var i = 1; i <= num; i++) {
var score = parseInt(prompt("请输入第" + i + "个学生的成绩:"));
total += score;
}
var avg = total / num;
document.getElementById("total").innerHTML = "该班级总成绩为:" + total + "分";
document.getElementById("avg").innerHTML = "该班级平均成绩为:" + avg.toFixed(2) + "分";
}
</script>
</body>
</html>
```