c++ - What type for operations on pointers -

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I have searched a lot, but nothing could be found useful - but then I am not sure that I am the right thing Search for

Is there a scalar defined by standard that should be bigger than at least one indicator? To wit. Sizeof (?) & Gt; = Sizeof (Zero *).

I need this because I am writing a small garbage collector and want something on the lines of this: 

  structure tag {uint32_t desc: sizeof (uint32_t) * 8-2; // To type the indicator UIT 32_t Free: 1; Uint32_t Symbol: 1; };   
 I think that is valid according to standard (if we are on it, I was quite surprised that sizeof (uint32_t) * 8-2 bitfield is valid for definition - but VS2010 Allows).  
 So what size_t does this requirement?  
 EDIT: After going ahead with some reasons for joining both C and C ++ (well and I thought they would be similar in that regard), I actually got one of them (I do not really need C ++ for this part of the code and I can add C and C ++ together that should work). And the CAM in this case seems to be the right standard from the answer.   
 
 
 You  & lt; Stdint.h & gt;  (or  & lt; cstdint & gt; ) and use  
 Since MSVC refuses to support the C99, you should  & lt; Windows.h & gt;  and use instead (see)  
 (Also, please use instead of 8).

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