1.簡易計算器

  <body>
    <form action="" method="post">
      <input type="number" id="num1" />
      <select id="ysf">
        <option value="+" id="+">+</option>
        <option value="-" id="-">-</option>
        <option value="*" id="*">*</option>
        <option value="/" id="/">/</option>
        <option value="%" id="%">%</option>
      </select>
      <input type="number" id="num2" />
      <input type="button" value="計算" id="btn" />
    </form>
    <p id="res"></p>
    <script>
      document.getElementById("btn").onclick = function () {
        var num1 = document.getElementById("num1").value;
        var num2 = document.getElementById("num2").value;
        var ysf = document.getElementById("ysf").value;
        document.getElementById("res").innerHTML = num1 + "---" + num2 + "---" + ysf;
        var res = document.getElementById("res");
        var fh = ysf;
        switch (ysf) {
          case document.getElementById("+").value:
            res.innerHTML = num1 + ysf + num2 + "=" + (num1 * 1 + num2 * 1);
            console.log(ysf);
            break;
          case document.getElementById("-").value:
            res.innerHTML = num1 + ysf + num2 + "=" + (num1 * 1 - num2 * 1);
            console.log(ysf);
            break;
          case document.getElementById("*").value:
            res.innerHTML = num1 + ysf + num2 + "=" + num1 * 1 * num2 * 1;
            break;
          case document.getElementById("/").value:
            res.innerHTML = num1 + ysf + num2 + "=" + num1 / num2;
            break;
          case document.getElementById("%").value:
            res.innerHTML = num1 + ysf + num2 + "=" + (num1 % num2);
            break;
        }
      };
      document.write('<table border="1" width="800px" align=center >');
      for (var hang = 1; hang <= 9; hang++) {
        document.write("<tr>");
        for (var lie = 1; lie <= hang; lie++) {
          document.write("<td>" + lie + "*" + hang + "=" + hang * lie + "</td> ");
        }
        document.write("</tr>");
      }
    </script>

成品圖：

2.九九乘法表

<script>
    document.write('<table border="1" width="800px" align=center >');
          for (var hang = 1; hang <= 9; hang++) {
            document.write("<tr>");
            for (var lie = 1; lie <= hang; lie++) {
              document.write("<td>" + lie + "*" + hang + "=" + hang * lie + "</td> ");
            }
            document.write("</tr>");
          }
</script>

附成品圖：

批改老師：

PHPz

批改狀態(tài)：合格

老師批語：

本博文版權(quán)歸博主所有，轉(zhuǎn)載請注明地址！如有侵權(quán)、違法，請聯(lián)系admin@php.cn舉報處理！

全部評論文明上網(wǎng)理性發(fā)言，請遵守新聞評論服務(wù)協(xié)議

0條評論

作者最新博文

markdown與Emmet插件的使用方式

2021-03-20 00:42:10

亚洲国产日韩欧美一区二区三区,精品亚洲国产成人av在线,国产99视频精品免视看7,99国产精品久久久久久久成人热,欧美日韩亚洲国产综合乱

1.簡易計算器

2.九九乘法表