split every game loop / screen loop to a separate function in Chess.c:main

[rodikh]

In the main function of your Chess.c file, you have 3 game loops inside one main loop.
It is always a good idea to separate these loops to different functions. it will keep your main function short and readable.

i.e. instead of reading a huge function that has many ifs and whiles, you can see a short function like this:

if (game_mode == SETTINGS){
  settingsScreen();
} else if (game_mode == TWO_PLAYER) {
  gameScreen(TWO_PLAYER);
} else if (game_mode == PLAYER_VS_COMP) {
  gameScreen(PLAYER_VS_COMP);
}

once again, since the loops for the pvp and pvc are nearly identical, you can write the code once, and have parameters decide what to do inside the function.