将变量作为基类对象进行迭代，同时强制转换为子类，并在C++中使用它们的重写方法

#include <iostream>
#include <vector>

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;
    }
};

int main() {
    std::vector<Base*> objects;
    objects.push_back(new Base());
    objects.push_back(new Derived());

    for (Base* obj : objects) {
        Derived* derivedObj = dynamic_cast<Derived*>(obj);
        if (derivedObj) {
            derivedObj->print();
        }
    }

    // 清理内存
    for (Base* obj : objects) {
        delete obj;
    }

    return 0;
}