Programmation c++

Bonjour,
j'ai un code a faire en c++, ca fait longtemps que j'ai pas programmé avec ce langage, je vous copie et colle le sujet du tp, et je serais reconnaissant de votre aide ou au moins une idee pour le prgrammer ;

Your program should be able to check whether a user selection is valid or not, it should also determine whether the user won, or there is a draw (nobody won), and terminate.
To implement this programm you need an array of 9 characters to keep track of the state of the board. Initially, the array is initialized from
1 to 9. The user's selection is stored as X, and program's selection is stored as O

You need functions to do the followinf :

1- display the board using the state information available in the array of 9 characters.
2-check whether s move is valid or not.
3-check for a sequence of O or X in anay row,column,or diagonal, to detect if the user or program has won.
4-check weather to terminate the program because there no more moves possible.
5-generate a new move randomly; however, your porgram must as well make smart moves.