It is a C++ program where the Tic-Tac-Toe game is running. It has functions that will show the winner and some of the invalid move.
It is a game built on C++ which is having two-player one player attempts the move first by using one column from 9 columns and then the first will get the cross sign and similarly, the second will come and choose one column from the rest column and will get a rounded shape. When the player chooses one column then that column takes that shape (i.e round or cross). After the 3 same sign appears either diagonally, horizontally, or vertically among the two-player firstly then that player will become the winner and it also shows an invalid move undertaken by the player. Thus, after the winner comes the game will end.