#define _CRT_SECURE_NO_WARNINGS
#include<iostream>
using namespace std;


class STRING
{
private:
    char *str;
    int length;
public:
    STRING()
    {
        cout << "По умолчанию " << endl;
        length = 0;
        str = new char[1];
        str[0] = '\0';
    }
    ~STRING()
    {
        cout << "Вызван деструктор " << this << endl;
        delete[] this->str;
    }
    STRING(char *str)
    {
        cout << "Вызван конструктор с параметром char* " << this << endl;
        length = strlen(str);
        this->str = new char[length + 1];
        for (int i = 0; i < length; i++)
        {
            this->str[i] = str[i];

        }
        this->str[length] = '\0';
    }
    STRING(const STRING &other)
    {
        cout << "Вызван конструктор копирования " << endl;
        length = other.length;
        this->str = new char[length + 1];
        for (int i = 0; i < length; i++)
        {
            this->str[i] = other.str[i];
        }

        this->str[length] = '\0';
    }
    STRING& operator =(const STRING &other)
    {
        cout << "Вызван оператор присваивания " << endl;
        if (this->str != '\0')
        {
            delete[] str;
        }
        length = other.length;
        this->str = new char[length + 1];
        for (int i = 0; i < length; i++)
        {
            this->str[i] = other.str[i];
        }
        this->str[length] = '\0';

        return *this;

    }

    operator const char*() const
    {
        cout << "Приведение типа " << endl;
        return str;
    }

    STRING operator +(const STRING &other)
    {
        cout << "Вызван оператор + " << endl;
        STRING newStr;
        newStr.length = this->length + other.length;
        newStr.str = new char[newStr.length + 1];
        int i = 0;
        for (; i < this->length; i++)
        {
            newStr.str[i] = this->str[i];
        }
        for (int j = 0; j < other.length; j++, i++)
        {
            newStr.str[i] = other.str[j];
        }
        newStr.str[newStr.length] = '\0';
        return newStr;
    };
    STRING& operator +=(const STRING &other)
    {
        cout << "Вызван оператор += " << endl;
        STRING newStr;
        newStr.length = this->length + other.length;
        newStr.str = new char[newStr.length + 1];
        int i = 0;
        for (; i<this->length; i++)
        {
            newStr.str[i] = this->str[i];
        }
        for (int j = 0; j< other.length; j++, i++)
        {
            newStr.str[i] = other.str[j];
            ;
        }
        newStr.str[newStr.length] = '\0';
        delete[] str;
        length = newStr.length;
        this->str = new char[length + 1];
        for (int i = 0; i < length; i++)
        {
            this->str[i] = newStr.str[i];
        }
        this->str[length] = '\0';
        return *this;
    }
    char& operator [](int index)
    {
        return this->str[index];
    }

    void Print()
    {
        cout << str;
        cout << endl;
    }
};
int main()
{
    setlocale(LC_ALL, "rus");
    STRING a("Pupa");
    STRING b("Lupa");
    STRING c(b);
    cout << c << endl;
    STRING result;
    cout << "============================================================" << endl << endl;
    result = a + b;
    cout << result << endl;
    cout << "============================================================" << endl << endl;
    a = b;
    cout << a << endl;
    cout << "============================================================" << endl << endl;
    c += a;
    cout << c << endl;
    cout << "============================================================" << endl << endl;
    cout << a[0] << endl;
    cout << a << endl;
    a[0] = 'P';
    cout << a << endl;
    system("pause");
    return 0;
}