If I declare an instance variable as volatile, will the object of this class be volatile?

Like:

class A
{
     volatile int i;
};


A a;

My question is that will the entire a become cv开发者_StackOverflow qualified? May be a naive question.

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No, all of a will not be volatile. Just as you can have fields of a class that are const without every instance of the class being const, you can have volatile fields that do not make the entire class instance volatile.