c++中如何捕获多个异常_c++多异常捕获方法

try {
    // 可能抛出异常的代码
    throw 42;        // 抛出 int
    // throw std::runtime_error("error");  // 或抛出标准异常
}
catch (int e) {
    <strong>std::cout << "捕获到整型异常: " << e << std::endl;</strong>
}
catch (double e) {
    <strong>std::cout << "捕获到浮点型异常: " << e << std::endl;</strong>
}
catch (const std::exception& e) {
    <strong>std::cout << "标准异常: " << e.what() << std::endl;</strong>
}
catch (...) {
    <strong>std::cout << "捕获到未知异常" << std::endl;</strong>
}

struct MyException1 : public std::exception {
    const char* what() const noexcept override { return "MyException1"; }
};
<p>struct MyException2 : public std::exception {
const char* what() const noexcept override { return "MyException2"; }
};</p><p>try {
throw MyException1();
}
catch (const MyException1& e) {
<strong>std::cout << "处理 MyException1: " << e.what() << std::endl;</strong>
}
catch (const MyException2& e) {
<strong>std::cout << "处理 MyException2: " << e.what() << std::endl;</strong>
}</p>

catch (...) {
    std::cout << "发生未预期的异常" << std::endl;
    // 可在此记录日志或清理资源
}

catch (const std::exception& e) {
    std::cout << "日志记录: " << e.what() << std::endl;
    throw;  // 保持原始异常类型和栈状态
}