Follow-Up on 2048, my first C++ game

This follow-up is on my latest post regarding my 2048 game (If you haven't seen it yet, check it out here).

Although the game is - currently - 4×4, the code actually supports any >2 value. The only way to play it in another size (10×10 for example) is by changing a certain constant integer's value before running the code, which makes this feature limited to those who have the code (and by "those" I mean myself XD). This is because the game's grid is actually a global array, which means that it doesn't have to be sent as a parameter for nearly every single function.

The alternative will be giving the array any arbitrary value (20 for example) and changing the access of the program to that array depending on the user's input, but that's a waste of resources especially if you'll stick with small grids.

The game can also be played with either the default arrow keys or those embedded in the numpad (if your keyboard includes one). The reason why I mention this is because each of them returns a 2-part scan code upon being pressed: the first is 224 (default) or 0 (numpad), while the second is the scan code value they both share.

Initially, the game supported WASD keys too, but I got rid of that afterwards as this game isn't suitable for gamers (The amazing UI would definitely give them a heart attack XD).

Speaking of which, that UI - as simple as it might look - actually took nearly half the amount of time it took to write the rest of the program! I've also changed it a little bit and made it grow with respect to the numbers in it, giving it a simpler & much cleaner look (Check out version 2 from here).

Tip N' Trick

Put the terminal into full-screen mode then zoom in (You'll thank me later)

Another thing I'd like to mention is that the highest number you can possibly get in this game (while in 4×4 mode) is 131072. This can only be achieved if you're a lucky grandmaster that not only managed to align the numbers in this order but was also lucky enough to get a 4 generated instead of a 2:

Finally, some stats (because why not):

• 5 Libraries
• 6 Global Variables (1 Boolean - 2 Arrays of Integers - 3 Integers)
• 12 Functions (2 Boolean - 10 Void)
• 61 Local Variables (1 Struct - 1 Array of Structs - 1 Array of Integers - 4 Boolean - 54 Integers)
• 425 Lines (even after applying excessive bracket-removal techniques)

*Surprisingly, the "Main" function is actually 12 lines (including 3 lines for brackets and definition), making it the shortest function in the whole program!