C++自定义异常消息不显示

class MyException : public std::exception {
public:
    MyException(const std::string& message) : message_(message) {}

    const char* what() const noexcept override {
        return message_.c_str();
    }

private:
    std::string message_;
};

throw MyException("自定义异常消息");

try {
    // 代码块
} catch (const MyException& e) {
    std::cout << "捕获到异常：" << e.what() << std::endl;
}