Difference between copy constructor and assignment operator in C++ (OOP tutorial for beginners)

In this programming tutorial, we will learn the difference between an assignment operator and a copy constructor in C++. I'll teach you how to use an assignment operator as well as how to use a copy constructor. We will also learn some common mistakes that developers make when working with assignment operators and copy constructors. It is crucial that you understand the difference between these two so that you don't make any bugs while using them.
Enjoy the video and leave your questions in the comment section.

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CONTENTS:
00:00 - Assignment operator VS copy constructor
01:06 - Where to learn practical programming
03:19 - Explaining the startup code
06:15 - How we use the copy constructor
11:10 - How we use the assignment operator
15:36 - The most important difference between the assignment operator and copy constructor
22:44 - Working with pointers

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*******CODE IS IN THE COMMENTS*******

[CodeBeauty]

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FROM THE

#include <iostream>
using namespace std;

class Movie {
public:
string Name;
string Genre;
float Rating;

Movie(string name, string genre, float rating) {
Name = name;
Genre = genre;
Rating = rating;
}
Movie()
{
Name = "";
Genre = "";
Rating = 0;
}
Movie(const Movie& original) {
Name = original.Name;
Genre = original.Genre;
Rating = original.Rating;
}
Movie& operator=(const Movie& original) {
Name = original.Name;
Genre = original.Genre;
Rating = original.Rating;

return *this;
}
};

int main()
{
Movie movie1("The Dark Knight", "Action", 9.5);
Movie movie2("The Lion King", "Animated", 8);

Movie movie3;
Movie movie4(movie1);
movie4 = movie2;
//movie4.operator=(movie2);

Movie movie5 = movie1;
movie5 = movie2;

cin.get();
}

[christopherrice]

I've been waiting patiently for more coding videos in C++ and it looks like my patience is paying off because lookie here! A new C++ coding video🤗!! Thank You very much Saldina✌️!!

[sbrhqml]

These technical differences particularly how the memory is allocated and deallocated at the backend you taught through excel they are highly commendable. Dynamic allocation is the tough part for beginners but you explained really well the topic that is hard to find on youtube

[snehadey]

I am very excited for this video🥰I like your C++ programming tutorials, it helps me very much💝

[yawsokpor]

Hi Iike your teaching method, the way you explained the difference between copy constructor and assingment costructor is very interesting

[ProgrammerSolver]

Great teacher, thank you so much, you have an easy explanation way i understand all what you say, much love for you Saldina, i hope i have enough money to pay for your course

[amirhosseinmoghimzadeh]

it was very good
please publish more videos on OOP

[joebosah]

Thanks, SN
Shallow Copy and Deep Copy
Rule of 3 (and the lesser known Law of the Big Two)

[fikirgunlugum]

We are waiting, and happy that the content picture does not include sub-messages. 😂

[dabbabimarwen]

I Like The Way You Insist On Details I'd Like To See The Process Of Writing an object with A String Field In a Binary File : Save Method
Good Continuation... ♥

[marcusantenor]

26:53 you imagine that the array contains 2 variables so that the explanation could fit better. However, so far in the lecture/code, the counter is set to 0 and the array is empty.

[nicholaskomsa]

It would make sense to also cover move constructor, move assignment operator, to be complete.

[marcusantenor]

Hi can you make a video in that serie that talks about move constructor?

[vkatasonov]

Hi, Sabina, you should probably add "Orthodox Canonical Style" to the video title:) trust me, a lot of people will look for it as soon as it explained quite poor in YouTube

[سراجمصطفىمحمد]

I have a question
when you delete the array of Pointers in the assignment operator and make a new srting dinamic array
why the adress changes in Exel explanition althout u don't make
Actors= nullptr?

[naderhumood]

Thank you Saldina....vedio is graat and Your gorgeous.

[whitewolf]

This is some high level content with low level programming!



yess I know C++ is a high level programming language ok

[Muhammadaliofficial]

What is difference between constructors and structures

[nicholaskomsa]

While an assignment-copy is a "Deep Copy", moving is a "Shallow Copy". Shallow copy steals pointers rather than duplicate their contents. here you go:
struct Movie {
std::string title;
int year;

Movie() {
std::cout << "()\n";
}
~Movie() {
std::cout << "~\n";
}

Movie(const Movie& other) : title(other.title), year(other.year) {
std::cout << "copy\n";
}
Movie(Movie&& other) noexcept : title(std::move(other.title)), year(other.year) {
std::cout << "move\n";
}
Movie(const std::string& title, int year) : title(title), year(year) {
std::cout << "ctor\n";
}

Movie& operator=(const Movie& other) {
std::cout << "copy=\n";
if (this != &other) {
title = other.title;
year = other.year;
}
return *this;
}
Movie& operator=(Movie&& other) noexcept {

std::cout << "move=\n";
if (this != &other) {
title = std::move(other.title);
year = other.year;
}
return *this;
}
};

Movie hobbit("Hobbit", 2010);
Movie lionking("Lion King", 1994);
std::array<Movie, 3> movies{ Movie{"The Matrix", 1999}, lionking, std::move(hobbit) };

movies.front() = Movie{ "The Matrix 2", 2003 };
movies.back() = movies.front();

[danielkoziarski]

I do not understand why initializer list has been omitted for the demonstrated constructors. 😢