23.C++函数重载和重写

#include <iostream>

class OverloadExample {
public:
    void print(int i) {
        std::cout << "Integer: " << i << std::endl;
    }

    void print(double d) {
        std::cout << "Double: " << d << std::endl;
    }

    void print(std::string str) {
        std::cout << "String: " << str << std::endl;
    }
};

int main() {
    OverloadExample obj;
    obj.print(10);       // 调用 print(int)
    obj.print(3.14);     // 调用 print(double)
    obj.print("Hello");  // 调用 print(std::string)
    return 0;
}

#include <iostream>

class Base {
public:
    virtual void show() {  // 父类的虚函数
        std::cout << "Base class show()" << std::endl;
    }
};

class Derived : public Base {
public:
    void show() override {  // 重写基类函数
        std::cout << "Derived class show()" << std::endl;
    }
};

int main() {
    Base* basePtr;
    Derived obj;
    basePtr = &obj;

    basePtr->show();  // 调用 Derived 的 show()（运行时多态）
    return 0;
}