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// 让代码工作
use std::thread;
use std::time::Duration;

fn main() {
    thread::spawn(|| {
        for i in 1..3 {
            println!("hi number {} from the spawned thread", i);
            thread::sleep(Duration::from_millis(1));
        }
    });

    for i in 1..3 {
        println!("hi number {} from the main thread", i);
        thread::sleep(Duration::from_millis(1));
    }
    println!("Success!");
}

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// 让代码工作：主线程应等待子线程结束
use std::thread;
use std::time::Duration;

fn main() {
    let handle = thread::spawn(|| {
        for i in 1..3 {
            println!("spawned: {}", i);
            thread::sleep(Duration::from_millis(1));
        }
    });

  __;

    println!("Success!");
}

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// 让代码工作
use std::thread;

fn main() {
    let v = vec![1, 2, 3];

    let handle = thread::spawn(move || {
        println!("Here's a vector: {:?}", v);
    });

    handle.join().unwrap();
    println!("Success!");
}

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// 填空
use std::thread;

fn main() {
    let s = String::from("hello");

    let handle = thread::spawn(move || {
        println!("{}", s);
    });

    // 取消下面这行的注释并修复错误
    // println!("{}", s);

    handle.join().unwrap();
    println!("Success!");
}