Havving trouble making reversi game in c

Hello, Can you please give me tips on how should I approach this.

I haven't been taught how to sole this during classes and i'm expected to do all problems like this and i am haing trouble doing these problems
I thought that learning the concept would help but I still lack the intuition. Please give me tips/advice something that can help me solve this.

The problem:

Code:

/** * Switch player, i.e. switch the turn to play for the opponent * * Parameters: * rev - Variable to start */ void reversi_player_invert (Reversi_t *rev) { SOLVE }