C$++$ Using encapsulated and abstraction implemented and without using vectors, Any help in regards to trying to write this would be amazing

Goal of the game is to update or set a board number to $7$

Game will consist of $3$ or more players

Each player will be given a game number between $1-6$

Your player may select their game number

Other players' game numbers are randomly chosen

Each turn a player may add their game number to a board number

Your player will select the board number

Other players will select a board number that would make $7$ or randomly if not possible.

Each selection to a board number will increase its value

If adding that number equals $7$ that player receives a point, and the board number resets to $0$

If the board number exceeds $7$ the board number will then change to a number between $1-6$

For example, if the board number was $5$ and the game number added was $3$ the board

number will change to $1$ instead of $8.$

If the board number was $6$ and game number was $4$ the board number will change to $3$

instead of $10$

Here are the possible scenarios:

$8$ changes to $1$

$9$ changes to $2$

$10$ changes to $3$

$11$ changes to $4$

$12$ changes to $5$

The first player to receive $3$ points wins!