Cargo示例

Cargo

Cargo是Rust编程语言官方的项目管理器和包管理器。

例1

  1. 创建工程：
     $ cargo new test_project
  2. 运行工程（在工程目录中）：
     $ cargo run

例2

使用The Rust Programming Language中第二章示例代码：

use std::cmp::Ordering;
use std::io;

use rand::Rng;

fn main() {
    println!("Guess the number!");

    let secret_number = rand::thread_rng().gen_range(1..=100);

    loop {
        println!("Please input your guess.");

        let mut guess = String::new();

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

        let guess: u32 = match guess.trim().parse() {
            Ok(num) => num,
            Err(_) => continue,
        };

        println!("You guessed: {guess}");

        match guess.cmp(&secret_number) {
            Ordering::Less => println!("Too small!"),
            Ordering::Greater => println!("Too big!"),
            Ordering::Equal => {
                println!("You win!");
                break;
            }
        }
    }
}
  1. 运行cargo check，发现缺少rand；
  2. 查询rand：
    $ cargo search rand
  3. 注册rand依赖项（于Cargo.toml中）：
    [package]
 name = "test_project"
 version = "0.1.0"
 edition = "2024"

 [dependencies]
 rand = "0.9.0"
  4. 重新编译项目：
     $ cargo build