【C语言】深⼊理解指针4-CFANZ编程社区

前言

正则表达式测试工具可供您输入正则表达式和测试文本，立即查看匹配结果.

下面是离线的HTML文件,同样可以提供相同的服务.

使用说明

HTML代码

<!DOCTYPE html>
<html>

<head>
    <meta charset="UTF-8">
    <style>
    body {
      font-family: Arial, sans-serif;
      background-color: #f4f4f4;
    }

    h2 {
      color: #333;
      margin-bottom: 20px;
    }

    label {
      display: block;
      margin-top: 10px;
      font-weight: bold;
    }

    input[type="text"],
    textarea {
      padding: 5px;
      border: 1px solid #ccc;
      border-radius: 5px;
      font-size: 14px;
    }

    input[type="checkbox"] {
      margin-top: 10px;
    }

    button {
      padding: 10px 20px;
      background-color: #4CAF50;
      color: white;
      border: none;
      border-radius: 5px;
      cursor: pointer;
      font-size: 16px;
    }

    button:hover {
      background-color: #45a049;
    }

    #regex {
      width: 1000px;
      height: 80px;
      border: 1px solid #ccc;
      border-radius: 5px;
      padding: 5px;
      font-size: 14px;
      resize: none;
    }

    #testString {
      width: 1000px;
      height: 180px;
      white-space: pre-wrap;
      border: 1px solid #ccc;
      border-radius: 5px;
      padding: 5px;
      font-size: 14px;
      resize: none;
    }

    #matchResult {
      width: 1000px;
      height: 180px;
      white-space: pre-wrap;
      border: 1px solid #ccc;
      border-radius: 5px;
      padding: 5px;
      font-size: 14px;
      resize: none;
    }

    </style>
</head>

<body>

<h2>正则表达式测试工具</h2>

<label for="testString">测试字符串：</label><br>
<textarea id="testString"></textarea><br>

<label for="regex">正则表达式：</label><br>
<input type="text" id="regex"><br>

<input type="checkbox" id="globalSearch"> 全局搜索
<input type="checkbox" id="ignoreCase"> 忽略大小写

<button onclick="testRegex()">测试</button>

<label for="matchResult">匹配结果：</label><br>
<textarea id="matchResult"></textarea>

<script>
    function testRegex() {
      var regex = document.getElementById("regex").value;
      var testString = document.getElementById("testString").value;
      var globalSearch = document.getElementById("globalSearch").checked;
      var ignoreCase = document.getElementById("ignoreCase").checked;

      try {
        var regexOptions = '';
        if (globalSearch) {
          regexOptions += 'g';
        }
        if (ignoreCase) {
          regexOptions += 'i';
        }
        var regexObj = new RegExp(regex, regexOptions);
        var matches = testString.match(regexObj);
        if (matches) {
          var result = "匹配成功：\n" + matches.length + "个匹配结果\n";
          for (var i = 0; i < matches.length; i++) {
            result += matches[i] + "\n";
          }
          document.getElementById("matchResult").value = result;
        } else {
          document.getElementById("matchResult").value = "匹配失败";
        }
      } catch (e) {
        document.getElementById("matchResult").value = "正则表达式错误: " + e.message;
      }
    }

</script>

</body>

</html>