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  3. func(void) or func() ?

func(void) or func() ?

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  • C Christian Graus

    Anna :) wrote: You haven't looked at any of my source then. Fair enough... I knew it could be done that way, you understand, it's just that with all the people I have worked with, all the code I have downloaded and all the books I have read ( including both from Stroustrup ), I've never seen it used. I don't think it's particularly wrong, only void main is actually *wrong*, but I see a fair bit of it, and as I say, no int main(void) Christian No offense, but I don't really want to encourage the creation of another VB developer. - Larry Antram 22 Oct 2002 Hey, at least Logo had, at it's inception, a mechanical turtle. VB has always lacked even that... - Shog9 04-09-2002 During last 10 years, with invention of VB and similar programming environments, every ill-educated moron became able to develop software. - Alex E. - 12-Sept-2002

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    jan larsen
    wrote on last edited by
    #15

    Stroustrup had an article in CUJ a couple of months ago on the subject "C and C++ compatibility", he mentions the empty parameter list vs. the void parameter list and one of them is supposed to mean that the function may take a parameter of any type, but I can't remember which... "After all it's just text at the end of the day. - Colin Davies "For example, when a VB programmer comes to my house, they may say 'does your pool need cleaning, sir ?' " - Christian Graus

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    • C Christian Graus

      Anna :) wrote: You haven't looked at any of my source then. Fair enough... I knew it could be done that way, you understand, it's just that with all the people I have worked with, all the code I have downloaded and all the books I have read ( including both from Stroustrup ), I've never seen it used. I don't think it's particularly wrong, only void main is actually *wrong*, but I see a fair bit of it, and as I say, no int main(void) Christian No offense, but I don't really want to encourage the creation of another VB developer. - Larry Antram 22 Oct 2002 Hey, at least Logo had, at it's inception, a mechanical turtle. VB has always lacked even that... - Shog9 04-09-2002 During last 10 years, with invention of VB and similar programming environments, every ill-educated moron became able to develop software. - Alex E. - 12-Sept-2002

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      Anna
      wrote on last edited by
      #16

      Having never read a C++ book until after I learnt the language :eek: it just made sense to me that if you have to specify that a method returns void, it was more consistant to specify it for methods which take no parameters also. :) As it's not mandated either way by the language spec, it really comes down to personal style. It is notable though that if you try to declare a C# method with parameter "void" the compiler barfs at you..which only goes to reinforce one of your earlier sigs. ;) Anna :rose: "Be yourself - not what others think you should be"
      - Marcia Graesch

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      • L Lost User

        Since upgrading to VS.NET I have noticed that any classes I add using the "Add New Class" wizard will use void for functions with no params (such as constructors/destructors). Personally, I haven't bothered doing this sonce my C days, so my question is - are there any benefits to void? What do you prefer for your member functions: void SomeFunc(void); or void SomeFunc();


        When I am king, you will be first against the wall.

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        Marc Clifton
        wrote on last edited by
        #17

        in C#, void SomeFunc(void) is not a legal syntax. A parameterless function must be declared void SomeFunc(). It drives me crazy, especially because I like the first way to explicitly say "this function takes no parameters". Oh well. Marc Help! I'm an AI running around in someone's f*cked up universe simulator.

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        • M Marc Clifton

          in C#, void SomeFunc(void) is not a legal syntax. A parameterless function must be declared void SomeFunc(). It drives me crazy, especially because I like the first way to explicitly say "this function takes no parameters". Oh well. Marc Help! I'm an AI running around in someone's f*cked up universe simulator.

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          Anna
          wrote on last edited by
          #18

          Me too. X| Anna :rose: "Be yourself - not what others think you should be"
          - Marcia Graesch

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          • J jan larsen

            Stroustrup had an article in CUJ a couple of months ago on the subject "C and C++ compatibility", he mentions the empty parameter list vs. the void parameter list and one of them is supposed to mean that the function may take a parameter of any type, but I can't remember which... "After all it's just text at the end of the day. - Colin Davies "For example, when a VB programmer comes to my house, they may say 'does your pool need cleaning, sir ?' " - Christian Graus

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            David Salter
            wrote on last edited by
            #19

            jan larsen wrote: one of them is supposed to mean that the function may take a parameter of any type, but I can't remember which... See my post above. Dave.

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            • L Lost User

              Since upgrading to VS.NET I have noticed that any classes I add using the "Add New Class" wizard will use void for functions with no params (such as constructors/destructors). Personally, I haven't bothered doing this sonce my C days, so my question is - are there any benefits to void? What do you prefer for your member functions: void SomeFunc(void); or void SomeFunc();


              When I am king, you will be first against the wall.

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              Tim Smith
              wrote on last edited by
              #20

              From the C++ standard: If the parameterdeclarationclause is empty, the function takes no arguments. The parameter list (void) is equivalent to the empty parameter list. Tim Smith I'm going to patent thought. I have yet to see any prior art.

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              • T Tim Smith

                From the C++ standard: If the parameterdeclarationclause is empty, the function takes no arguments. The parameter list (void) is equivalent to the empty parameter list. Tim Smith I'm going to patent thought. I have yet to see any prior art.

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                Tim Smith
                wrote on last edited by
                #21

                Note: void Func (); Means two different things to C and C++ Tim Smith I'm going to patent thought. I have yet to see any prior art.

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                • V Vagif Abilov

                  main function can be declared as returning void or int both in C and C++. If you declare it as int, you let your program return a value (typically an error code) that operating system or calling process can use. Vagif Abilov MCP (Visual C++) Oslo, Norway Hex is for sissies. Real men use binary. And the most hardcore types use only zeros - uppercase zeros and lowercase zeros. Tomasz Sowinski

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                  Eddie Velasquez
                  wrote on last edited by
                  #22

                  Vagif Abilov wrote: main function can be declared as returning void or int both in C and C++ Returning void is not standard C++. The standard C++ version of main is

                  int main()
                  {
                  }


                  There are only 10 kind of people in the world: those who understand binary and those who don't.

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                  • L Lost User

                    Since upgrading to VS.NET I have noticed that any classes I add using the "Add New Class" wizard will use void for functions with no params (such as constructors/destructors). Personally, I haven't bothered doing this sonce my C days, so my question is - are there any benefits to void? What do you prefer for your member functions: void SomeFunc(void); or void SomeFunc();


                    When I am king, you will be first against the wall.

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                    Maximilien
                    wrote on last edited by
                    #23

                    I don't care, I decided to use only the following prototype for all of my C functions, and use casting till death!

                    void someFunc( const void * const * const args )
                    {

                    }

                    and deal with it later ! Max.

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                    • L Lost User

                      Since upgrading to VS.NET I have noticed that any classes I add using the "Add New Class" wizard will use void for functions with no params (such as constructors/destructors). Personally, I haven't bothered doing this sonce my C days, so my question is - are there any benefits to void? What do you prefer for your member functions: void SomeFunc(void); or void SomeFunc();


                      When I am king, you will be first against the wall.

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                      Eddie Velasquez
                      wrote on last edited by
                      #24

                      Robert Edward Caldecott wrote: void SomeFunc(void); This isn't C++ style it's C style


                      There are only 10 kind of people in the world: those who understand binary and those who don't.

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                      • M Maximilien

                        I don't care, I decided to use only the following prototype for all of my C functions, and use casting till death!

                        void someFunc( const void * const * const args )
                        {

                        }

                        and deal with it later ! Max.

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                        Alvaro Mendez
                        wrote on last edited by
                        #25

                        :-) Well good for you! But shouldn't you be returning void*? Regards, Alvaro


                        Well done is better than well said. -- Benjamin Franklin

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                        • J jan larsen

                          Stroustrup had an article in CUJ a couple of months ago on the subject "C and C++ compatibility", he mentions the empty parameter list vs. the void parameter list and one of them is supposed to mean that the function may take a parameter of any type, but I can't remember which... "After all it's just text at the end of the day. - Colin Davies "For example, when a VB programmer comes to my house, they may say 'does your pool need cleaning, sir ?' " - Christian Graus

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                          C Offline
                          Christian Graus
                          wrote on last edited by
                          #26

                          I have that issue, I may pull it out. Christian No offense, but I don't really want to encourage the creation of another VB developer. - Larry Antram 22 Oct 2002 Hey, at least Logo had, at it's inception, a mechanical turtle. VB has always lacked even that... - Shog9 04-09-2002 During last 10 years, with invention of VB and similar programming environments, every ill-educated moron became able to develop software. - Alex E. - 12-Sept-2002

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