如何从基类向量中获取派生类变量？

#include <iostream>

class Base {
public:
    virtual void print() {
        std::cout << "This is the base class." << std::endl;
    }
};

class Derived : public Base {
public:
    void print() override {
        std::cout << "This is the derived class." << std::endl;
    }

    void derivedFunction() {
        std::cout << "This is a function specific to the derived class." << std::endl;
    }
};

int main() {
    Base* basePtr = new Derived(); // 向上转型

    basePtr->print(); // 访问基类成员函数

    Derived* derivedPtr = dynamic_cast<Derived*>(basePtr); // 动态类型识别

    if (derivedPtr) {
        derivedPtr->derivedFunction(); // 访问派生类特有的成员函数
    }

    delete basePtr;

    return 0;
}