class Square public Squaredouble s = 0 sides double getArea const return side side; protected double side;;class Cube public Square public Cubedouble s = 0 Squares double getVolu

#include using namespace std;

int main() { Square s(2); Cube c(3);

cout << "Square area: " << s.getArea() << endl; // 输出：Square area: 4
cout << "Cube area: " << c.getArea() << endl; // 输出：Cube area: 54
cout << "Cube volume: " << c.getVolume() << endl; // 输出：Cube volume: 27

return 0;

}