#include <iostream>
using namespace std;
class Number {
    protected:
        double value;
    public:
       
        Number(double v) {
            value = v;
        }
      
        virtual double getValue() {
            return value;
        }
};
class Average : public Number {
    private:
        int count; 
        double sum; 
    public:
        Average(int c, double s) : Number(0) {
            count = c;
            sum = s;
        }
        double getValue() override {
            value = sum / count;
            return value;
        }
};

int main() {
    Number* numbers[5];
    numbers[0] = new Number(10);
    numbers[1] = new Number(20);
    numbers[2] = new Number(30);
    numbers[3] = new Number(40);
    numbers[4] = new Number(50);
    double sum = 0;
    for (int i = 0; i < 5; i++) {
        sum += numbers[i]->getValue();
    }
    Average* avg = new Average(5, sum);
    cout << "The average of the five numbers is " << avg->getValue() << endl;
    for (int i = 0; i < 5; i++) {
        delete numbers[i];
    }
    delete avg;
    return 0;
}