board.rs

#[derive(Copy, Clone)]
enum Cell {
    Empty,
    Cross,
    Zero
}

fn print_cell(cell: Cell) {
    match cell {
        Cell::Empty => println!("empty"),
        Cell::Cross => println!("cross"),
        Cell::Zero => println!("zero")
    }
}
fn main() {
    let cells: [Cell; 9] = [Cell::Empty; 9];
    for (i, cells) in cells.chunks(3).enumerate() {
        for (j, cell) in cells.iter().enumerate() {
            print!("{},{}: ", i, j);
            print_cell(*cell);
        }
    }
}