Assignment Operator

#include <iostream>
using namespace std;
class MyString
{
    private:
        char *str;
    public:
        MyString();
        MyString(const char *str);
        MyString( const MyString &other);
        ~MyString();

        //assignment operator
        MyString& operator=(const MyString &rhs); // copy assignment operator

        void Display() const;
        int get_length() const;
        const char *get_str() const;
};

MyString& MyString::operator=(const MyString &rhs)
{
    //if (this == &ref)
    //    return *this;

    delete[] this -> str;
    str = new char[strlen(rhs.str)+1];
    delete[] this -> str;
    str = new char[strlen(rhs.str)+1];
    strcpy(this->str , rhs.str);
    return *this;
}
MyString::MyString()
{
    str = new char[1];
    *str = '\0';
}
MyString::MyString(const char * s)
{
    if(s == nullptr)
    {
        str = new char[1];
        *str = '\0';
    }
    else
    {
        str = new char[strlen(s)+1];
        strcpy(str, s);
    }
}

MyString::MyString(const MyString & source)
{
    cout << "Copy Constructor" << endl;
    str = new char[strlen(source.str)+1];
    strcpy(str, source.str);
}

MyString::~MyString()
{
    if (str != nullptr)
        delete[] str;
}
void MyString::Display() const
{
    for (int i = 0; i <strlen(str) ; i++)
        cout << str[i];
    cout << endl;
}

int MyString::get_length() const
{
    return strlen(str);
}
const char * MyString::get_str() const
{
    return str;
}

int main()
{
    MyString ms("Hello");
    MyString name("Sumit");
    MyString MyEdu("BELLB");
    MyString aa{name};
    aa.get_str();
    MyString a;
    a = aa;
    cout << "aa-> str : " << aa.get_str() << endl;
    cout << "a-> str : " << a.get_str() << endl;
    //aa = aa;
    //cout << name.get_str() << endl;
    //cout << "string is: " << ms.Display() << endl;
    //cout << "Length of the string : " << ms.get_length() << endl;
    //cout << "The string : " << ms.get_str() << endl;
    cout << "Program End" ;
    return 0;
}