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下载rust

https://www.rust-lang.org/zh-CN/learn/get-started

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安装完成后，查看版本

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在安装 Rustup 时，也会安装 Rust 构建工具和包管理器的最新稳定版，Cargo

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新建项目hello-rust

$ cargo new hello-rust
     Created binary (application) `hello-rust` package

包含的文件

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main.rs

fn main() {
    println!("Hello, world!");
}

运行

$ cd hello-rust

$ cargo run
   Compiling hello-rust v0.1.0 (E:\rust\hello-rust)
    Finished dev [unoptimized + debuginfo] target(s) in 2.10s
     Running `target\debug\hello-rust.exe`
Hello, world!

为应用添加依赖，Cargo.toml

[dependencies]
ferris-says = "0.1"

安装依赖

cargo build

注：

如果失败，请修改cargo镜像源

修改main.rs

use ferris_says::say;
use std::io::{stdout, BufWriter};
fn main() {
    let stdout  = stdout();
    let message = String::from("Hello fellow Rustaceans!");
    let width   = message.chars().count();

    let mut writer = BufWriter::new(stdout.lock());
    say(message.as_bytes(), width, &mut writer).unwrap();
}

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