复合表达式的自动格式化。
在复合表达式中,操作数和操作符的结合方式决定了整个表达式的值。
In a compound expression, the way in which the operands are grouped to the operators may determine the result of the overall expression.
如果程序员不想考虑这些规则,可以在复合表达式中使用圆括号强制实现某个特殊的分组。
Programmers can override these rules by parenthesizing compound expressions to force a particular grouping.
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