# Cargo工具

## 介绍

Cargo 是 Rust 的构建系统和包管理器

查看版本`cargo --version`

## 使用 Cargo 创建项目

```
$ cargo new hello_cargo
$ cd hello_cargo
```

Cargo创建的目录如下：

![](/files/-LokoUpf2GV6tngrZgef)

`Cargo.toml`为配置文件：

```
[package]
name = "hello_cargo"
version = "0.1.0"
authors = ["425776024 <425776024@qq.com>"]
edition = "2018"

# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html

[dependencies]
```

## 使用Cargo编译运行

```
hello_cargo % cargo build
Compiling hello_cargo v0.1.0 (.XXX/hello_cargo)
    Finished dev [unoptimized + debuginfo] target(s) in 0.99s
```

多出来一些编译文件，可执行文件在target/debug/hello\_cargo，首次运行 `cargo build` 时，也会使 Cargo 在项目根目录创建一个新文件：Cargo.lock。这个文件记录项目依赖的实际版本，自动的不用管

![](/files/-LokoUplVmnNpeBUMvNV)

运行：

```
./target/debug/hello_cargo
Hello, world!
```


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