目录1. 防止优化2. 用于硬件交互3. 多线程共享变量（有一定局限性）volatile是 C 和 C++ 中的一个类型限定符，它用于告诉编译编程客栈器被修饰的变量具有特殊的属性，编译器在对该变量进行优化时需要特殊对待。以下是
How to handle the case where the token \'for\' is used in two different situations in the language to parse? Such as statement and as a \"parameter\" as the following example:
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