Web前端开发JavaScript html

（1)计算每一个学生的总成绩，以表格形式输出
（2）按总成绩排名，以表格输出

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3条回答默认最新

Xiao_冬 2022-05-20 21:08

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<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
    <style>
      table {
        border: 1px solid #000;
        margin-bottom: 20px;
      }
      table td,
      table th {
        border: 1px solid #000;
        text-align: center;
        width: 100px;
      }
    </style>
  </head>
  <body>
    <script>
      const list = [
        {
          stuNo: 1,
          course1: 77,
          course2: 66,
          course3: 88,
          total: "",
        },
        {
          stuNo: 2,
          course1: 78,
          course2: 89,
          course3: 79,
          total: "",
        },
        {
          stuNo: 3,
          course1: 92,
          course2: 84,
          course3: 78,
          total: "",
        },
        {
          stuNo: 4,
          course1: 78,
          course2: 99,
          course3: 83,
          total: "",
        },
        {
          stuNo: 5,
          course1: 85,
          course2: 97,
          course3: 69,
          total: "",
        },
      ];
      const totalList = list.map((item) => {
        const { course1, course2, course3 } = item;
        // 暂时以course1,course2,course3为准
        item.total = course1 + course2 + course3;
        return item;
      });
      const rankList = [...totalList];
      rankList.sort((a, b) => b.total - a.total);

      const str1 = totalList.reduce((pre, cur) => {
        const temp = `<tr>
            <td>${cur.stuNo}</td>
            <td>${cur.course1}</td>
            <td>${cur.course2}</td>
            <td>${cur.course3}</td>
            <td>${cur.total}</td>
          </tr>`;
        return pre + temp;
      }, "");
      const str2 = rankList.reduce((pre, cur) => {
        const temp = `<tr>
            <td>${cur.stuNo}</td>
            <td>${cur.course1}</td>
            <td>${cur.course2}</td>
            <td>${cur.course3}</td>
            <td>${cur.total}</td>
          </tr>`;
        return pre + temp;
      }, "");

      const tableTemplate = `<table><tr><th>stuNo</th><th>course1</th>
          <th>course2</th>
          <th>course3</th>
          <th>total</th></tr>`;
      document.body.innerHTML =
        `${tableTemplate}${str1}</table>` + `${tableTemplate}${str2}</table>`;
    </script>
  </body>
</html>