基类对象的指针与派生类的指针的关系示例

#include <iostream>
using namespace std;

class Base {
public:
    virtual void display() {
        cout << "This is a Base object." << endl;
    }
};

class Derived : public Base {
public:
    void display() {
        cout << "This is a Derived object." << endl;
    }
};

int main() {
    Derived d;
    Base* pb = &d;
    pb->display();    // 调用 Derived 类的 display 函数

    return 0;
}
//gpt