#define _CRT_SECURE_NO_WARNINGS
#include <iostream>
#include <time.h>
#include <string>
using namespace std;

class tree {
public:
    int size,x,y;
    tree() {
        size = 10 + rand() % 50;
        x = 10 + rand() % 500;
        y = 10 + rand() % 500;
        //printf("tree size = %d",size);
    }
    ~tree() {
        printf("tree delete");
    }
    virtual void prt() {};
    virtual void set_xy() {};
};

class oak : public tree {
public:
    string name;
    oak():tree() {
        name = "oak";
    }

    void prt() {
        cout << "tree size = " << size << " meter name = " << name <<endl;
    }
    void set_xy(int x, int y) {
        this->x = x;
        this->y = y;
    }
    };

class birch : public tree {
public:
    string name;
    birch() :tree() {
        name = "birch";
    }

    void prt() {
        cout << "tree size = " << size << " meter name = " << name << endl;
    }
    void set_xy(int x, int y) {
        this->x = x;
        this->y = y;
    }
};

class maple : public tree {
public:
    string name;
    maple() :tree() {
        name = "maple";
    }

    void prt() {
        cout << "tree size = " << size << " meter name = " << name <<  endl;
    }
    void set_xy(int x, int y) {
        this->x = x;
        this->y = y;
    }
};

class MyStorage {
private:
    int _size;
    tree **obj,**obj2;
public:
    MyStorage(int size) {
        _size = size;
        obj = new tree*[_size];
    }
    int getCount() {
        return _size;
    }
    tree &getObject(int index) {
        return *obj[index];
    }
    void setObject(int index, tree *tr) {
        obj[index] = tr;
    }
    void add(int index, tree* tr) {
        _size++;
        obj2 = new tree * [_size];
        obj2[index] = tr;
        for (int i = 0; i < index; i++)
            obj2[i] = obj[i];
        for (int i = index+1; i < _size; i++)
            obj2[i] = obj[i-1];
        delete(obj);
        obj = new tree * [_size];
        for (int i = 0; i < _size; i++)
            obj[i] = obj2[i];
    }
    void del(int index, tree* tr) {

    }

};
int main()
{
    srand(time(NULL));
    //MyStorage storage(12);
    //cout << storage.getcount() << endl;
    //scanf("%d", &a);
    //cout << storage.getValue(a) << endl;
    /*storage.setValue(3, new oak());
    storage.getValue(3).prt();
    /*oak* a = new oak();
    a.*/
    // ٌîçنàهى ًُàيèëèùه
    MyStorage storage(10);
    // نîلàâëےهى â يهمî îلْهêٍû
    for (int i = 0; i < storage.getCount(); i++)
        storage.setObject(i, new maple());
    // îلًàùàهىٌے ïîî÷هًهنيî êî âٌهى
    for (int i = 0; i < storage.getCount(); i++)
        storage.getObject(i).prt();

}