c4

Minimalistic Connect4 C++20 game environment which uses as little resources as possible with the help of bitboards. By rewriting input() and print() functions in Interface, the engine can be integrated in any specific environment and device.

Board representation

        +-------------------+
        | 0 0 0 0 0 0 0 0 1 | <-- 63 bit
row 5	| 1 1 1 1 1 1 1 0 0 |
row 4	| 1 1 1 1 1 1 1 0 0 |
row 3	| 1 1 1 1 1 1 1 0 0 |
row 2	| 1 1 1 1 1 1 1 0 0 |
row 1	| 1 1 1 1 1 1 1 0 0 |
row 0	| 1 1 1 1 1 1 1 0 0 | <-- 56 bit
        +-------------------+
          |           |
          0 bit       42 bit

Last bit represents current player. 0x0 is X and 0x8000000000000000 is O.

How to use

#include "c4/interface.h"
...
c4::Interface{}.play();