Classes.md

Classes in C++

By default all inside a class is private.

Functions inside a class are called methods.

class Player
{
public:
    int x, y;
    int speed;

    void Move(int xa, int ya)
    {
        x += xa * speed;
        y += ya * speed;
    }
};

int main()
{
    // Using Default Constructor (created automatically for us)
    Player player1;

    player1.x = 5;
    player1.Move(1, -1);
}

Classes vs Struct

Video

Technically: Variables and methods in a Class are by default private, while Structs are by default public.

Structs exists in C++ as a way to maintain back-compatibility with C (the language), which doesn't have the concept of classes.

So Classes are basically very much similar to Structs.

In day to day, we normally uses Struct for 'plain old data', with not so many functionalities (methods). Yet, we could add some methods to a Struct.

Essentially, the difference is more a question of design. Structs are not suited for inheritance, this is a very good distinction; it's a very 'oop-ish' concept.

struct Vector2
{
    float x, y;
};