Kolos z kawą

#include <iostream>
#include <string>
#include <fstream>
using namespace std;


class K1 {
    string* p1;
public:
    K1() : p1(new string[2]) {p1[0] = "Nothing"; p1[1] = "Nothing";};
    K1(const string& one, const string& two) { p1 = new string[2]; p1[0] = one; p1[1] = two; };
    ~K1() { delete  p1; };
    friend ostream & operator <<(ostream &, const K1&);
    string & operator[](size_t i) const { // indexing operator
        return p1[i];
    }

};


ostream & operator <<(ostream & out, const K1 & object) {
    return out << object.p1[0] << " " << object.p1[1] << endl;
}

class K2 {
    K1 p1;
    double p2;
public:
    K2(): p2(0){};
    K2(const string & one, const string & two, const double & price): p1(one, two), p2(price){};
    K2(const K2 & object){ // konstruktor kopiacy
        p1 = object.p1;
        p2 = object.p2;
    }

    const K2 & operator=(const K2 & object){ // operator przypisania
        if(this != &object){
            p1 = object.p1;
            p2 = object.p2;
        }
        return *this;
    }

    const K2 operator-(const double & value) const {
        return K2(p1[0], p1[1], p2 - value);
    }

    void czytajLinie(ifstream & input){
            if(!input) throw string("Problem ze strumieniem wczytywania");
            input >> p1[0];
            input >> p1[1];
            input >> p2;

    }

    const K2 operator+(const double & value) const { // przeciazanie operatora sumy
        return K2(p1[0], p1[1], p2 + value);
    }

    const K2 operator +=(const double & value){
        this->p2 = this->p2 + value;
        return *this;
    }

    friend ostream & operator <<(ostream &, const K2&);
    friend const K2 operator +(const K2 & object, const string & value);
    friend const K2 operator +(const string & value, const K2 & object);

};

    const K2 operator +(const string & value, const K2 & object){
        return K2(value + object.p1[0], object.p1[1], object.p2);
    }

    const K2 operator +(const K2 & object, const string & value){
        return K2(object.p1[0], object.p1[1]  + value, object.p2);
    }

    ostream & operator <<(ostream & out, const K2& object){
    return out << object.p1[0] << " " << object.p1[1] << " " << object.p2 << endl;
}

int main() {
    K2 ob1, ob2;
    const K2* wsk1 = new K2("kawa", "z mlekiem", 4.50);
    const K2 ob3(*wsk1);
    delete wsk1;
    wsk1 = 0;

    const K2* wsk2 = new K2(ob3);
    ob2 = *wsk2;
    cout << ob1 << *wsk2;
    delete wsk2;
    wsk2 = 0;

    cout << ob2;
    cout << ob2 - 1.25;

    cout << "******** 3 **********" << endl;

    K2 tab[4];
    ifstream plik("data.txt");
    try{
        if(!plik) throw string("Cannot open the file");
        for(size_t i = 0; i < 4; ++i)
            tab[i].czytajLinie(plik);
    }
    catch(const string & err){cout << err << endl;}
    catch(...){cout << "Contact with developers" << endl;}


    for(size_t i = 0; i < 4; i++){
        tab[i] += 1; //??? how to overload +=
        cout << tab[i];
    }

    cout << "******** 4 **********" << endl;

    tab[1] = tab[1] + " with sugar";
    tab[3] = "hot " + tab[3];

    for(size_t i = 0; i < 4; i++)
        cout << tab[i];

    cout << "******** 5 **********" << endl;

    return 0;
}