C++；有没有办法让我的开关函数同时拒绝一个有效和无效的答案？

class InvalidAnswerException : public std::exception {
public:
    const char* what() const throw() {
        return "Invalid answer!";
    }
};

void switchFunction(int answer) {
    if (answer < 0 || answer > 1) {
        throw InvalidAnswerException();
    }

    // 执行有效答案的逻辑
    if (answer == 0) {
        // ...
    } else {
        // ...
    }
}

try {
    switchFunction(2);
} catch (const InvalidAnswerException& e) {
    std::cout << e.what() << std::endl;
}