Thread: static global

  1. 01-14-2008 #16
    39ster
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    Yes. "extern int u;" in f2.c.
  2. 01-14-2008 #17
    robwhit
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    yes, I know. I put that there to show that you needed to declare it with an extern in the file.
  3. 01-15-2008 #18
    Elysia
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    A dos prompt! Ewww!
    But as I said, I'm not an expert on the matter, so...
    I don't know! Go bug someone else!
    Quote Originally Posted by Adak View Post
    io.h certainly IS included in some modern compilers. It is no longer part of the standard for C, but it is nevertheless, included in the very latest Pelles C versions.
    Quote Originally Posted by Salem View Post
    You mean it's included as a crutch to help ancient programmers limp along without them having to relearn too much.

    Outside of your DOS world, your header file is meaningless.
  4. 01-15-2008 #19
    brewbuck
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    Quote Originally Posted by Elysia View Post
    What I meant is,
    Code:
    int x = 5;
    External linkage in C. Can be accessed from multiple .c files.
    In C++, however, it's internal linkage so trying to access it from another .cpp file will yield a compile error and redefining it will yield a linking error.
    That's untrue. It works the same as in C. You have to declare it as "extern" in the other modules that reference it.

    Code:
    static int x = 5;
    Internal linkage in C. Cannot be accessed from other .c files.
    I don't know what the effect is in C++, though. I don't know if it will cause external linkage in this case.
    Have you EVER worked on code composed of more than a single source file?
  5. 01-15-2008 #20
    Elysia
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    YES, I have. Hundreds of times.
    Quote Originally Posted by Adak View Post
    io.h certainly IS included in some modern compilers. It is no longer part of the standard for C, but it is nevertheless, included in the very latest Pelles C versions.
    Quote Originally Posted by Salem View Post
    You mean it's included as a crutch to help ancient programmers limp along without them having to relearn too much.

    Outside of your DOS world, your header file is meaningless.
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