创建从std :: exception派生的用户异常？

#include<iostream>
#include<exception>

class MyException : public std::exception {
public:
    MyException(const std::string& message) : message(message) {}
    const char* what() const throw() override {
        return message.c_str();
    }
private:
    std::string message;
};

int main() {
    try {
        throw MyException("Something went wrong");
    } catch (const MyException& e) {
        std::cerr << "Caught MyException: " << e.what()<< std::endl;
    } catch (const std::exception& e) {
        std::cerr << "Caught std::exception: " << e.what()<< std::endl;
    }
    return 0;
}