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Where is C99 round function?

Answers

  • VC2005 doesn't even have support for C projects that I have seen, nor does it let you add a .c file, you have to do it manually.  I'd be surprised if they supported C99.

     

    Monday, February 20, 2006 9:17 PM
  • VC8.0 doesn't fully support the C99 standards as Christian indicated.

    Thanks,
    Ayman Shoukry
    VC++ Team
    Monday, February 20, 2006 10:28 PM
  • We are trying to be more conformant to the C++ Standard. We have done some breaking changes for that as well. Nevertheless, I understand your comment. Please go ahead and log it at http://lab.msdn.microsoft.com/productfeedback/default.aspx. This gives us a great way of understanding what the community wants.

    BTW, _controlfp could be used in some cases: http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vclib/html/_crt__control87.2c_._controlfp.asp

    Thanks,
    Ayman Shoukry
    VC++ Team
    Tuesday, February 21, 2006 3:10 PM
  • It's a C++ compiler.  Microsoft is doing amazing things for C++ standards comformance.  The compiler doesn't even offer C projects, nor does it allow you to add a .c file in the IDE, I'd say you're playing with mostly legacy support.  I would imagine the market for a C compiler is about 1-4% of the market for a C++ compiler. 

    People pay $800 for a very good C++ compiler, and that is the standards conformance you've been reading about. 

    >>Please, tell me how widely C++/CLI is used in comparison to C99 features?

    In my world, VB is totally unused, I don't know anyone local to me who uses it.  It sounds like you don't know anyone who uses C++/CLI ( I barely use it myself ).  I know no-one who uses C, let alone C99.  In other words, what you percieve as 'widely used' is a result of the circles you move in.

     

    Tuesday, February 21, 2006 9:56 PM
  • >> Is this true VC++ 8.0 should not be used as a C compiler? I don't understand it.

    Surely the fact that the IDE doesn't actually support you creating .c files, you need to do it by hand, is a sign of how much C was in the mind of the VC++2005 team ?

    But, it IS a C compiler.  Just not C99.

    >> . Please, tell me what would you say Charles Petzold's Windows API books readers?

    LOL - I'd say 'welcome to hell'.  I can't imagine anyone buying VC2005 so they can write Petzold style WndProc programs.

    >> Simply, I don't get cgraus' point about that VC++ 8.0 is only C++ compilers.

    That's just not my point.  My point is that VC++ is SOLD as a C++ compiler, and I suspect the c compiler support is legacy stuff.  My CORE point is that no-one has ever claimed it would support C99.

    >> p.s. Certainly, that's clear C++ libraries and programs are based/compatible on C libraries.

    MOST C code will compile in c++.  C99 widens that gap.

    http://david.tribble.com/text/cdiffs.htm#C99-fam

    Wednesday, February 22, 2006 7:38 PM

All replies

  • VC2005 doesn't even have support for C projects that I have seen, nor does it let you add a .c file, you have to do it manually.  I'd be surprised if they supported C99.

     

    Monday, February 20, 2006 9:17 PM
  • VC8.0 doesn't fully support the C99 standards as Christian indicated.

    Thanks,
    Ayman Shoukry
    VC++ Team
    Monday, February 20, 2006 10:28 PM
  • I'm in shock!
    What people pay 800$ for?
    I read about "standards conformance" of VC++ 8.0 everwhere so I ask where is that conformance?
    Guys, you're working hard to include new and very experimental stuff like C++/CLI but you are not interested in making VC++ conformant to C99, rather old standard?

    Please, tell me how widely C++/CLI is used in comparison to C99 features?
    C++/CLI even won't be discussed in the nearest ACCU Conference 2006 !

    I will never understand Microsoft's way and there is no hope!

    Cheers
    Tuesday, February 21, 2006 6:23 AM
  • We are trying to be more conformant to the C++ Standard. We have done some breaking changes for that as well. Nevertheless, I understand your comment. Please go ahead and log it at http://lab.msdn.microsoft.com/productfeedback/default.aspx. This gives us a great way of understanding what the community wants.

    BTW, _controlfp could be used in some cases: http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vclib/html/_crt__control87.2c_._controlfp.asp

    Thanks,
    Ayman Shoukry
    VC++ Team
    Tuesday, February 21, 2006 3:10 PM
  • It's a C++ compiler.  Microsoft is doing amazing things for C++ standards comformance.  The compiler doesn't even offer C projects, nor does it allow you to add a .c file in the IDE, I'd say you're playing with mostly legacy support.  I would imagine the market for a C compiler is about 1-4% of the market for a C++ compiler. 

    People pay $800 for a very good C++ compiler, and that is the standards conformance you've been reading about. 

    >>Please, tell me how widely C++/CLI is used in comparison to C99 features?

    In my world, VB is totally unused, I don't know anyone local to me who uses it.  It sounds like you don't know anyone who uses C++/CLI ( I barely use it myself ).  I know no-one who uses C, let alone C99.  In other words, what you percieve as 'widely used' is a result of the circles you move in.

     

    Tuesday, February 21, 2006 9:56 PM
  •  Ayman Shoukry wrote:
    We are trying to be more conformant to the C++ Standard. We have done some breaking changes for that as well.

    Yes, I know that.

     Ayman Shoukry wrote:
    Nevertheless, I understand your comment. Please go ahead and log it at http://lab.msdn.microsoft.com/productfeedback/default.aspx. This gives us a great way of understanding what the community wants.

    I'm glad you understand my point. I'll give my feedback too.

     Ayman Shoukry wrote:
    BTW, _controlfp could be used in some cases

    Thanks, I'll try it.

    Is this true VC++ 8.0 should not be used as a C compiler? I don't understand it. Please, tell me what would you say Charles Petzold's Windows API books readers? AFAIK Petzold's examples are poor C programs. Should they use MinGW?

    Simply, I don't get cgraus' point about that VC++ 8.0 is only C++ compilers.

    p.s. Certainly, that's clear C++ libraries and programs are based/compatible on C libraries.

    Cheers

    Wednesday, February 22, 2006 12:05 PM
  •  cgraus wrote:
    It's a C++ compiler.

    So, now I can try to understand it. As I read in Appendinx C to Standard for Programming Language C++ (working draft):

    7 The C++ Standard library provides 209 standard functions from the C library, as shown in Table 102.

    And there is no round function in this Table 102. So, now your point seems to be clear.

     cgraus wrote:
    Microsoft is doing amazing things for C++ standards comformance.

    Yes, I know that.

     cgraus wrote:
    The compiler doesn't even offer C projects, nor does it allow you to add a .c file in the IDE,

    You're right, but some time ago it did. How Charles Petzold created his sample projects?

     cgraus wrote:
    People pay $800 for a very good C++ compiler, and that is the standards conformance you've been reading about.

    From this point of view I agree.

    Cheers

    Wednesday, February 22, 2006 1:52 PM
  • >> Is this true VC++ 8.0 should not be used as a C compiler? I don't understand it.

    Surely the fact that the IDE doesn't actually support you creating .c files, you need to do it by hand, is a sign of how much C was in the mind of the VC++2005 team ?

    But, it IS a C compiler.  Just not C99.

    >> . Please, tell me what would you say Charles Petzold's Windows API books readers?

    LOL - I'd say 'welcome to hell'.  I can't imagine anyone buying VC2005 so they can write Petzold style WndProc programs.

    >> Simply, I don't get cgraus' point about that VC++ 8.0 is only C++ compilers.

    That's just not my point.  My point is that VC++ is SOLD as a C++ compiler, and I suspect the c compiler support is legacy stuff.  My CORE point is that no-one has ever claimed it would support C99.

    >> p.s. Certainly, that's clear C++ libraries and programs are based/compatible on C libraries.

    MOST C code will compile in c++.  C99 widens that gap.

    http://david.tribble.com/text/cdiffs.htm#C99-fam

    Wednesday, February 22, 2006 7:38 PM
  •  cgraus wrote:

    >> Is this true VC++ 8.0 should not be used as a C compiler? I don't understand it.

    Surely the fact that the IDE doesn't actually support you creating .c files, you need to do it by hand, is a sign of how much C was in the mind of the VC++2005 team ?

    But, it IS a C compiler.  Just not C99.

    OK, I have been clarified with this subject now. Thanks.

     cgraus wrote:

    >> . Please, tell me what would you say Charles Petzold's Windows API books readers?

    LOL - I'd say 'welcome to hell'.  I can't imagine anyone buying VC2005 so they can write Petzold style WndProc programs.

    Yes, I can imagine it :-)

     cgraus wrote:

    >> Simply, I don't get cgraus' point about that VC++ 8.0 is only C++ compilers.

    That's just not my point.  My point is that VC++ is SOLD as a C++ compiler, and I suspect the c compiler support is legacy stuff.  My CORE point is that no-one has ever claimed it would support C99.

    I understand it.

    Cheers

    Thursday, February 23, 2006 10:02 AM
  • Hello guys, I had the same problem, because I'm starting to use visual C++, but I have a lot of past C code that I want to use in my future C++ projects...it's not a big problem anyway.

     

    But I have another question, I've downloaded libc2.5.1 from the web, is it possible to include all of it in my C++ projects?

    and if so, how can I do it?

    thanks

    Francesco

     

    Thursday, March 27, 2008 1:23 PM
  • FWIW, a fair amount of C99 is being added to VS 2013.
    Friday, June 28, 2013 10:19 PM