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C++ try 关键字

❮ C++ 关键字


示例

如果 age 小于 18,则抛出异常

try {
  int age = 15;
  if (age >= 18) {
    cout << "Access granted - you are old enough.";
  } else {
    throw (age);
  }
}
catch (int myNum) {
  cout << "Access denied - You must be at least 18 years old.\n";
  cout << "Age is: " << myNum;
} 

自己试一下 »


定义和用法

The try 关键字创建一个 try...catch 语句。

The try 语句允许您定义一段代码块以在执行时测试是否有错误。

The catch 语句允许您定义一段代码块以在 try 代码块中发生错误时执行。


相关页面

The catch 关键字在抛出异常时运行代码。

The throw 关键字创建异常。

在我们的 C++ 异常教程 中了解更多关于异常的信息。


❮ C++ 关键字

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