添加标记函数体开头的左大括号。

Add the left brace that marks the beginning of the function body.

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(左大括号)应在复合语句其实行的结尾处。

The (left curly brace) should be at the end of the line that begins the compound statement.

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(右大括号)应与{(左大括号)的那一行的开头对齐

The } (right curly brace) should begin a line and be indented to align with the beginning of the line containing the matching { (left curly brace).

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