MyString

#include <iostream>
#include <vector>

class MyString
{
private:
    char* m_data;
    size_t m_len;
    void copy_data(const char* s)
    {
        m_data = new char[m_len + 1];
        memcpy(m_data, s, m_len);
        m_data[m_len] = '';
    }

public:
    MyString()
    {
        m_data = NULL;
        m_len = 0;
    }

    MyString(const char* p)
    {
        m_len = strlen(p);
        copy_data(p);
    }

    MyString(const MyString& str)
    {
        m_len = str.m_len;
        copy_data(str.m_data);
        std::cout << "Copy Constructor is called! source:" << str.m_data << std::endl;
    }

    MyString& operator=(const MyString& str)
    {
        if (this != &str)
        {
            m_len = str.m_len;
            copy_data(str.m_data);
        }
        std::cout << "Copy Assignment is called! source:" << str.m_data << std::endl;
        return *this;
    }

    MyString(MyString&& str)
    {
        std::cout << "Move Constructor is called! source:" << str.m_data << std::endl;
        m_len = str.m_len;
        m_data = str.m_data;
        str.m_len = 0;
        str.m_data = NULL;
    }

    MyString& operator=(MyString&& str)
    {
        std::cout << "Move Assignment is called! source:" << str.m_data << std::endl;

        if (this != &str)
        {
            m_len = str.m_len;
            m_data = str.m_data;
            str.m_len = 0;
            str.m_data = NULL;
        }
        
        return *this;
    }

    virtual ~MyString()
    {
        if (m_data != NULL)
        {
            delete[] m_data;
        }
    }
};

int main(void)
{
    MyString a;
    a = MyString("Hello");

    std::vector<MyString> vec;
    vec.push_back(MyString("World"));

    system("pause");
    return 0;
}