C++ 函数的类方法如何重载？

class ClassName {
public:
    // 重载方法的声明
    ReturnType methodName(ParameterType1, ParameterType2, ...);
    ReturnType methodName(ParameterType3, ParameterType4, ...);
    // ...
};

#include <iostream>
using namespace std;

class Shape {
public:
    virtual double getArea() { return 0.0; }
};

class Rectangle : public Shape {
public:
    double width, height;

    Rectangle(double w, double h) : width(w), height(h) {}

    double getArea() override { return width * height; }
};

class Circle : public Shape {
public:
    double radius;

    Circle(double r) : radius(r) {}

    double getArea() override { return 3.14 * radius * radius; }
};

int main() {
    Shape* shapes[] = {new Rectangle(2, 3), new Circle(4)};

    for (Shape* shape : shapes) {
        cout << "Area: " << shape->getArea() << endl;
    }

    for (auto shape : shapes) {
        delete shape;
    }
    return 0;
}