问根据数组元素的索引替换它

EN

  --> src/main.rs:30:17
   |
30 |                 board[movement] = fire;
   |                 ^^^^^^^^^^^^^^^ slice indices are of type `usize` or ranges of `usize`
   |
   = help: the trait `std::slice::SliceIndex<[char]>` is not implemented for `u32`
   = note: required because of the requirements on the impl of `std::ops::Index<u32>` for `[char]`

use std::io;
use std::io::Write;

fn main() {
    let mut board: [char; 9] = [' '; 9];
    let fire: char = '?';
    // let water: char = '?';

    let mut movement = String::new();
    let valid_cells = 1..9;

    loop {
        print!("Please input your movement: ");
        io::stdout().flush().unwrap();

        io::stdin()
            .read_line(&mut movement)
            .expect("Failed to read line!");

        let movement: u32 = match movement.trim().parse() {
            Ok(num) => num,
            Err(_) => {
                println!("That's not a valid number!");
                continue;
            }
        };

        match valid_cells.contains(&movement) {
            true => {
                board[movement] = fire;
            }
            _ => {
                println!("That's not a valid cell!");
                continue;
            }
        }

        for (i, x) in board.iter().enumerate() {
            print!("| {}: {}", i, x);
            if (i + 1) % 3 == 0 {
                println!("\n");
            }
        }

        if !board.contains(&' ') {
            break;
        }
    }
}