What size exactly is the constant BUFSIZ

This is a discussion on What size exactly is the constant BUFSIZ within the C++ Programming forums, part of the General Programming Boards category; BUFSIZ is declared in stdio.h but I havn't been able to find out exactly how big it makes the buffer ...

  1. #1
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    What size exactly is the constant BUFSIZ

    BUFSIZ is declared in stdio.h but I havn't been able to find out exactly how big it makes the buffer when I use it.

    I'm just curios.
    Well english isn't my first language, (it's instead a useless language called danish which only 5 milion people speak!!) so if you think my grammar SUCKS (it does by the way) than you're more then welcome to correct me.
    Hell I might even learn something

  2. #2
    It's full of stars adrianxw's Avatar
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    Look in your stdio.h file. In mine, (VC++ 6.0 Pro), it says...

    >>>
    #if defined(_M_MPPC)
    #define BUFSIZ 4096
    #else /* defined (_M_MPPC) */
    #define BUFSIZ 512
    #endif /* defined (_M_MPPC) */
    <<<

    ... I would not rely on that for any random buffer I used, I would always size my own.
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  3. #3
    C++ Developer XSquared's Avatar
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    Code:
    #include <iostream>
    #include <cstdio>
    int main( void ) {
        std::cout<<BUFSIZ<<std::endl;
    }
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