题解 | #子类中调用父类构造#

#include <iostream>
using namespace std;

class Base {

    private:
        int x;
        int y;

    public:
        Base(int x, int y) {
            this->x = x;
            this->y = y;
        }

        int getX() {
            return x;
        }

        int getY() {
            return y;
        }

};

class Sub : public Base {

    private:
        int z;

    public:
        Sub(int x, int y, int z) : Base(x, y)   {
            // write your code here
            this->z = z;
        }

        int getZ() {
            return z;
        }

        int calculate() {
            return Base::getX() * Base::getY() * this->getZ();
        }

};

int main() {

    int x, y, z;
    cin >> x;
    cin >> y;
    cin >> z;
    Sub sub(x, y, z);
    cout << sub.calculate() << endl;
    
    return 0;
}