How to make Dev-C++ more C99 compliant ??

This is a discussion on How to make Dev-C++ more C99 compliant ?? within the C Programming forums, part of the General Programming Boards category; I am using Dev-C++ 4.9.9.2 . I found it not support the type long long. Here is my code Code: ...

  1. #1
    C/C++Newbie Antigloss's Avatar
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    How to make Dev-C++ more C99 compliant ??

    I am using Dev-C++ 4.9.9.2 . I found it not support the type long long. Here is my code
    Code:
    #include <stdio.h>
    
    int main(void)
    {
          unsigned int un = 3000000000; /* system with 32-bit int */
          short end = 200;              /* and 16-bit short       */
          long big = 65537;
          long long verybig = 12345678908642;
    
          printf("un = %u and not %d\n", un, un);
          printf("end = %hd and %d\n", end, end);
          printf("big = %ld and not %hd\n", big, big);
          printf("verybig= %lld and not %ld\n", verybig, verybig);
    
          getchar();
          return 0;
    }
    here is the warning message
    Quote Originally Posted by warning
    G:\Documents and Settings\antigloss\a.c In function `main':
    5 G:\Documents and Settings\antigloss\a.c [Warning] this decimal constant is unsigned only in ISO C90
    8 G:\Documents and Settings\antigloss\a.c [Warning] integer constant is too large for "long" type
    and the output
    Quote Originally Posted by output
    un = 3000000000 and not -1294967296
    end = 200 and 200
    big = 65537 and not 1
    verybig= 1942899938 and not 2874
    My question is how to set up dev-c++ so that it'll support the type long long ??

  2. #2
    cwr
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    Looks to me like it supports long long. Don't you need to append LL on the end of the constant, otherwise it treats it as just a long?

    Edit:

    Code:
          unsigned int un = 3000000000UL; /* system with 32-bit int */
          short end = 200;              /* and 16-bit short       */
          long big = 65537;
          long long verybig = 12345678908642LL;
    Last edited by cwr; 10-06-2005 at 02:12 AM.

  3. #3
    C/C++Newbie Antigloss's Avatar
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    I tried this prog under linux using gcc3.2. It works very well.

    I've tried the suffix LL, but it didn't work. Seems like my version of devcpp didnt come with a c99 library ??

  4. #4
    cwr
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    Oh, the library is a separate issue. The compiler appears to support C99, otherwise the long long declaration would have been rejected. The library appears to not if %lld didn't result in correct output.

  5. #5
    and the hat of wrongness Salem's Avatar
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    I've heard before that dev-c++ inherits the 'bugs' of the run-time library on which it runs (namely microsoft)
    http://msdn.microsoft.com/library/de..._functions.asp
    So I think you need to use the "I64" grubbyness when using long long variables in printf() conversions when programming in dev-c++.
    Normal arithmetic and parameter passing within your program should work as per the standard, it's just a pain to print them

    To make the compiler compile C99 code, if you have a reasonably new gcc compiler, then you could try adding "-std=c99" to the compiler command line.
    If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
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    Registered User TactX's Avatar
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    The gcc family had support for long long even before C99. It was an non-standard extension.

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    Quote Originally Posted by Salem
    I've heard before that dev-c++ inherits the 'bugs' of the run-time library on which it runs (namely microsoft)
    I think you heard wrong -- by default dev-c++ (version 5) uses GNU gcc and g++ compilers, but can be changed to use any compiler you wish. standard runtime libraries are also from GNU, not M$.

    There are no compilers that are 100% C99 compliant -- Comeau is probably the closest.
    Last edited by Ancient Dragon; 10-06-2005 at 05:07 AM.

  8. #8
    Just Lurking Dave_Sinkula's Avatar
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    Quote Originally Posted by Ancient Dragon
    I think you heard wrong -- by default dev-c++ (version 5) uses GNU gcc and g++ compilers, but can be changed to use any compiler you wish. standard runtime libraries are also from GNU, not M$.
    http://www.bloodshed.net/devcpp.html:
    Bloodshed Dev-C++ is a full-featured Integrated Development Environment (IDE) for the C/C++ programming language. It uses Mingw port of GCC (GNU Compiler Collection) as it's compiler. Dev-C++ can also be used in combination with Cygwin or any other GCC based compiler.
    http://www.mingw.org/docs.shtml#win32api:
    Win32 API Documentation
    MinGW uses the runtime libraries distributed with the OS, [...]
    7. It is easier to write an incorrect program than understand a correct one.
    40. There are two ways to write error-free programs; only the third one works.*

  9. #9
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    that's referring to the win32 api functions not the c or c++ runtime standard libraries. All compilers for MS-Windows os must use the MS-Windows api dlls and libraries and I would suspect the same applies to all other os as well.

  10. #10
    Just Lurking Dave_Sinkula's Avatar
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    7. It is easier to write an incorrect program than understand a correct one.
    40. There are two ways to write error-free programs; only the third one works.*

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    Just because I say "the sky is falling" doesn't make it so. Kenneth Thompson (the author of that quote) may or may not be an authority on the subject. MS-Windows os does not supply the libraries when you install the os, they must be installed with the compiler. Since GNU has their own open-source compiler and libraries I assumed (maybe wrongly) that Dev-C++ installed and used those. I doubt Microsoft will authorize other compilers (competetors) to distribute Microsoft proprietry/copyright runtime libraries.

  12. #12
    Yes, my avatar is stolen anonytmouse's Avatar
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    Dev-C++/MinGW uses msvcrt.dll, which is distributed as part of the OS.

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    Dev-C++/MinGW uses msvcrt.dll, which is distributed as part of the OS.
    Correct, and msvcrt.dll does not support C99. The new Visual C/C++ 2005 compiler does not support C99 either, it's ridiculous.

    Note: Pelles C supports C99 and uses it's own runtime library.
    Last edited by n7yap; 10-06-2005 at 01:32 PM.

  14. #14
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    Quote Originally Posted by anonytmouse
    Dev-C++/MinGW uses msvcrt.dll, which is distributed as part of the OS.
    I knew that -- just making sure you guys are paying attention Won't be the first or last time I'm proving wrong.

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