rust入门篇-hello world

新建一个目录,

mkdir project

进入目录:

cd project

 

touch main.rs

fn main() {

   println!("Hello, world!");

}

编译:

$ rustc main.rs

运行:

$ ./main

Hello, world!

 

或者使用:cargo 命令来新建一个项目

cargo new hello_cargo

 

$ cd hello_cargo

$ cargo build
   Compiling hello_cargo v0.1.0 (file:///projects/hello_cargo)
    Finished dev [unoptimized + debuginfo] target(s) in 2.85 secs

默认会在target/build 目录生成编译文件,添加--release会在target/release生成编译文件

 

然后运行编译后的文件:

$./target/debug/hello_cargo

Hello, world!

 

也可以运行:

$ cargo run
    Finished dev [unoptimized + debuginfo] target(s) in 0.0 secs
     Running `target/debug/hello_cargo`
Hello, world!

 

最后你可以用cargo check运行你写的代码:

$ cargo check
   Checking hello_cargo v0.1.0 (file:///projects/hello_cargo)
    Finished dev [unoptimized + debuginfo] target(s) in 0.32 secs

 

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