20.12.2018

#include <iostream>
#include<cstring>
using namespace std;




class _String
{
    char*data;
public:
    _String()
    {
        data = nullptr;
    }
    _String(const char*s)
    {
        size_t size = strlen(s) + 1;
        data = new char[size];
        memcpy(data, s, size);
    }

    _String(const _String &other)
    {
        cout << "construct copy\n";
        size_t size = strlen(other.data) + 1;
        data = new char[size];
        memcpy(data, other.data, size);
    }

    _String(_String &&other)
    {
         cout<< "Move copy\n";
        swap(data, other.data);
        other.data = nullptr;
    }



    _String & operator = (const _String & other)
    {
        cout << "Operator = \n";
        if (this == &other) return *this;
        {
            data = new char[strlen(other.data) + 1];
            memcpy(data, other.data, strlen(other.data) + 1);
            return*this;
        }
    }

    _String operator = (_String && other)
    {
        cout << "Move \n";
        swap(data, other.data);
        return *this;
    }

    _String  operator + (const _String & other)
    {
        cout << "operat + \n";
        _String temp;
        temp.data = new char[strlen(data) + strlen(other.data) + 1];
        memcpy(temp.data, data, strlen(data));
        memcpy(temp.data + strlen(data), other.data, strlen(other.data) + 1);
        return temp;
    }
    void Print()
    {
        cout << data << endl;
    }

    ~_String()
    {
        cout << "deletor\n";
        delete[] data;

    }
};

void main()
{
    _String s1("Hello "), s2("world"), s3;
    s3 = s1 + s2;
    s3.Print();
    _String s4(s3);
    system("Pause");
}