Tic Tac Toe play game functionality definition

main.rs

fn play_game(){
    println!("TIC TAC TOE Game");
    println!("Enter 1 to 9");

    let mut is_won = false;
    let mut game_over = false;
    let mut count = 0;
    let mut board = vec![String::from(" ");9]; // creates 9 elements of String that contains a space

    display_board(&board);

    while !is_won && !game_over && count < 9 {
        let player : String = if let true = count % 2  == 0 { String::from("X") } else { String::from("O") };
        println!("Current Player - {} ",player);
        
        let choice = get_input();
        let index : usize = choice.parse().unwrap_or(0);
        let mut is_valid : bool = true;

        if choice != String::from("e"){
            (is_valid,is_won) = plot_player(&player,&mut board,&index);
            display_board(&board);
        } else if choice == String::from("e"){
            end_game();
            game_over = true;
        }
        if is_valid {
            count += 1;
        }

        if is_won{
            println!("{} won the game",player);
            game_over = true;
        }
    }

    end_game();
}