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Update chapter_2.md

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令狐一冲
2023-05-17 14:07:37 +08:00
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@@ -152,7 +152,7 @@ cargo new hello_world
### 2.3.2 编写程序 ### 2.3.2 编写程序
默认情况下，main.rs文件中已经包含了一个简单的Hello, World程序，代码如下： 默认情况下，main.rs文件中已经包含了一个简单的Hello, World程序，代码如下：
``` ```Rust
fn main() { fn main() {
println!("Hello, world!"); println!("Hello, world!");
} }