C++多平台开发的效率和可维护性如何？

#include <iostream>
#include <vector>

using namespace std;

class Shape {
public:
    virtual double area() const = 0;
    virtual double perimeter() const = 0;
    virtual ~Shape() {}
};

class Circle : public Shape {
public:
    Circle(double radius) : m_radius(radius) {}

    double area() const override { return M_PI * m_radius * m_radius; }
    double perimeter() const override { return 2 * M_PI * m_radius; }

private:
    double m_radius;
};

class Rectangle : public Shape {
public:
    Rectangle(double width, double height) : m_width(width), m_height(height) {}

    double area() const override { return m_width * m_height; }
    double perimeter() const override { return 2 * (m_width + m_height); }

private:
    double m_width;
    double m_height;
};

void calculate(const vector<Shape*>& shapes) {
    for (const Shape* shape : shapes) {
        cout << "Area: " << shape->area() << endl;
        cout << "Perimeter: " << shape->perimeter() << endl;
    }
}

int main() {
    vector<Shape*> shapes;
    shapes.push_back(new Circle(5.0));
    shapes.push_back(new Rectangle(3.0, 4.0));

    calculate(shapes);

    for (Shape* shape : shapes) {
        delete shape;
    }

    return 0;
}