tree.h

#include <string>
#include <iostream>
#include <fstream>
using namespace std;
class Tree {
protected:
    string name;
    unsigned age;
    unsigned branches;
public:
    friend ifstream & operator>>(ifstream & in, Tree & t) {
        in>>t.name;
        in>>t.age;
        in>>t.branches;
        return in;
    }

    friend ostream & operator<<(ostream & os, const Tree & t) {
        os<<"Name: "<<t.name<<endl;
        os<<"Age: "<<t.age<<endl;
        os<<"Number of branches: "<<t.branches<<endl<<endl;
        return os;
    }

    string get_name()const {return name;}
    unsigned get_branches()const {return branches;}
};

class Plod:public Tree {
private:
    string sort;
    double vrozh;
public:
    friend ifstream & operator>>(ifstream & in, Plod & p) {
        in>>p.name;
        in>>p.age;
        in>>p.branches;
        in>>p.sort;
        in>>p.vrozh;
        return in;
    }

    friend ostream & operator<<(ostream & os, const Plod & p) {
        os<<"Name: "<<p.name<<endl;
        os<<"Age: "<<p.age<<endl;
        os<<"Number of branches: "<<p.branches<<endl;
        os<<"Sort: "<<p.sort<<endl;
        os<<"Vrozhaynist: "<<p.vrozh<<endl<<endl;
        return os;
    }

    string get_sort()const {return sort;}
    double get_vrozh()const {return vrozh;}
};

class Decor:public Tree {
private:
    double height;
    double pryrist;
public:
    double get_height()const {return height;}
    double get_pryrist()const {return pryrist;}
};