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Asked: 2026-05-11T15:29:03+00:00

Occasionally I need to use fixed-width integers for communication with external devices like PLCs.

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Occasionally I need to use fixed-width integers for communication with external devices like PLCs. I also use them to define bitmasks and perform bit manipulation of image data. AFAIK the C99 standard defines fixed-width integers like int16_t. However the compiler I use, VC++ 2008 doesn’t support C99 and AFAIK Microsoft is not planning to support it.

My question is what is the best practice for using fixed-width integers in C++?

I know that VC++ defines non-standard fixed-width integers like __int16, but I am hesitant to use a non-standard type. Will the next C++ standard define fixed-width integers?

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1 Answer

  1. Boost has the typedefs for all of the C99 types and more: ‘Boost integer library’

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