How do I separate interface and implementation cleanly for game development?

In game development, separating interface and implementation is crucial for maintainability and readability of the code. This separation allows developers to define how a class can be used without revealing how it works internally. Below is an example of how to achieve this in C++:

    // Interface (Header File: IPlayer.h)
    class IPlayer {
    public:
        virtual void move(int x, int y) = 0;
        virtual void jump() = 0;
        virtual ~IPlayer() {}
    };

    // Implementation (Source File: Player.cpp)
    #include "IPlayer.h"
    class Player : public IPlayer {
    public:
        void move(int x, int y) override {
            // Implementation of move
        }

        void jump() override {
            // Implementation of jump
        }
    };