“不匹配的类型：预期的 `i16`，发现 `Result`”在猜数字游戏中

我正在用Rust编写一个随机数字猜测程序，但当我检查实际数字时，我得到一个错误，上面写着；预期i16，找到枚举std::result::Result'

use rand::Rng; // 0.8.0
use std::io::{stdin, stdout, Write};
use std::process;
use std::result::Result;

fn read(input: &mut String) {
    stdout().flush().expect("failed to flush");
    stdin().read_line(input).expect("failed to read");
}

fn main() {
    loop {
        let mut number = String::new();
        let rand_ = rand::thread_rng().gen_range(1..10);
        let mut killcheck = String::new();

        println!("Input a number between 0 and 10 \n");
        match rand_ {
            1..=5 => println!("it is 1 through 5"),
            5..=10 => println!("it is 5 through 10"),
            _ => continue,
        }
        read(&mut number);



        let number: i16 = number.trim().parse::().unwrap();
        match number {
            Ok(ok) => continue,
            Err(e) => println!("No number could be found"),
            _ => continue
        }

        read(&mut killcheck);



        if killcheck.trim() == "end" {
            println!("error is null");
            process::exit(0x0100);
        }

        if number == rand_ {
            println!("Currect!\n")
        }
        if number != rand_ {
            println!("Incorrect!\n")
        }

        read(&mut killcheck);
        if killcheck.trim() == "end" {
            println!("error is null");
            process::exit(0x0100);
        }
    }
}

我不理解这个问题，我想只是检查一下它是否会发生，然后继续。