problem with unistd.h in VC++

It always produce an error that cant find "unistd.h" why? Any re开发者_JAVA百科medies for this?

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Services for Unix ships with various linux related headers (including unistd.h), so you could use that. But that might require to link some of the SFU libraries..

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Why? It's just not there. It looks like you try to compile a program that is not portable or you try to port the program to Windows.

unistd.h is a not a standard header. Probably you find it only on Unix-like systems.

See: Wiki

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See Is there a replacement for unistd.h for Windows (Visual C)? for a partial replacement. (If you can add aditional functionality, please do so).