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@ -2,17 +2,17 @@
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> [ch03-04-comments.md](https://github.com/rust-lang/book/blob/master/second-edition/src/ch03-04-comments.md)
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> [ch03-04-comments.md](https://github.com/rust-lang/book/blob/master/second-edition/src/ch03-04-comments.md)
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> <br>
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> <br>
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> commit d4c77666f480edfb960cc9b11a31c42f4b90c745
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> commit f949ff883628db8ed2f2f5f19e146ebf19ed6a6f
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所有编程语言都力求使其代码易于理解,不过有时需要提供额外的解释。在这种情况下,程序员在源码中留下记录,或者 **注释**(*comments*),编译器会忽略它们不过其他阅读代码的人可能会用得上。
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所有程序员都力求使其代码易于理解,不过有时还需要提供额外的解释。在这种情况下,程序员在源码中留下记录,或者 **注释**(*comments*),编译器会忽略它们,不过阅读代码的人可能觉得有用。
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这是一个简单的注释的例子:
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这是一个简单的注释:
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```rust
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```rust
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// Hello, world.
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// hello, world
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```
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```
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在 Rust 中,注释必须以两道斜杠开始,并持续到本行的结尾。对于超过一行的注释,需要在每一行都加上 `//`,像这样:
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在 Rust 中,注释必须以两道斜杠开始,并持续到本行的结尾。对于超过一行的注释,需要在每一行前都加上 `//`,像这样:
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```rust
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```rust
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// So we’re doing something complicated here, long enough that we need
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// So we’re doing something complicated here, long enough that we need
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@ -26,17 +26,17 @@
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```rust
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```rust
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fn main() {
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fn main() {
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let lucky_number = 7; // I’m feeling lucky today.
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let lucky_number = 7; // I’m feeling lucky today
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}
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}
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```
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```
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不过你会经常看到它们用于这种格式,也就是位于它所解释的代码行的上面一行:
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不过你更经常看到以这种格式使用它们,也就是位于它所解释的代码行的上面一行:
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<span class="filename">文件名: src/main.rs</span>
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<span class="filename">文件名: src/main.rs</span>
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```rust
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```rust
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fn main() {
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fn main() {
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// I’m feeling lucky today.
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// I’m feeling lucky today
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let lucky_number = 7;
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let lucky_number = 7;
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}
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}
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```
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```
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