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Update ch02.md #60

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Jul 21, 2023
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Update ch02.md #60

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Update ch02.md
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@Janus1984
Janus1984 committed Mar 1, 2023
commit 1c5b7c8726e84289f5c7b4354a6957c1bd45187b
4 changes: 2 additions & 2 deletions notes/ch02.md
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Expand Up @@ -156,7 +156,7 @@

### 初始化和const
- const对象**必须初始化**，且**不能被改变**。
- const变量默认不能被其他文件访问，非要访问，必须在指定const定义之前加extern。要想在多个文件中使用const变量共享，定义和声明都加const关键字即可。
- const变量默认不能被其他文件访问，非要访问，必须在指定const定义之前加extern。要想在多个文件中使用const变量共享，定义和声明都加extern关键字即可。

### const的引用

Expand Down Expand Up @@ -244,4 +244,4 @@ strct Sale_data{
...
}
#endif
```
```