virtual Decides Which Function Runs

1#include <iostream>
2using namespace std;
3 
4class Shape {
5public:
6    virtual void draw() const { cout << "Shape::draw" << endl; }
7    void name() const { cout << "Shape::name" << endl; }
8    virtual ~Shape() {}
9};
10 
11class Circle : public Shape {
12public:
13    void draw() const override { cout << "Circle::draw" << endl; }
14    void name() const { cout << "Circle::name" << endl; }
15};
16 
17int main() {
18    Circle c;
19    Shape* p = &c;
20    Shape& r = c;
21 
22    c.draw();
23    c.name();
24    p->draw();
25    p->name();
26    r.draw();
27    r.name();
28    return 0;
29}