Skip to content
  • Categories
  • Recent
  • Tags
  • Popular
  • World
  • Users
  • Groups
Skins
  • Light
  • Cerulean
  • Cosmo
  • Flatly
  • Journal
  • Litera
  • Lumen
  • Lux
  • Materia
  • Minty
  • Morph
  • Pulse
  • Sandstone
  • Simplex
  • Sketchy
  • Spacelab
  • United
  • Yeti
  • Zephyr
  • Dark
  • Cyborg
  • Darkly
  • Quartz
  • Slate
  • Solar
  • Superhero
  • Vapor

  • Default (No Skin)
  • No Skin
Collapse
Code Project
  1. Home
  2. General Programming
  3. C / C++ / MFC
  4. bool and BOOL

bool and BOOL

Scheduled Pinned Locked Moved C / C++ / MFC
question
32 Posts 6 Posters 0 Views 1 Watching
  • Oldest to Newest
  • Newest to Oldest
  • Most Votes
Reply
  • Reply as topic
Log in to reply
This topic has been deleted. Only users with topic management privileges can see it.
  • T toxcct

    what ????? doesn't a Byte having 8 bits ?

    [VisualCalc][Binary Guide][CommDialogs] | [Forums Guidelines]

    CPalliniC Offline
    CPalliniC Offline
    CPallini
    wrote on last edited by
    #15

    But it hasn't 8 hexadecimal digits. I.e. I was kidding about your binary numbers prefixed like hexadecimal ones. :)

    If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler. -- Alfonso the Wise, 13th Century King of Castile.
    This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong. -- Iain Clarke

    In testa che avete, signor di Ceprano?

    T 1 Reply Last reply
    0
    • CPalliniC CPallini

      But it hasn't 8 hexadecimal digits. I.e. I was kidding about your binary numbers prefixed like hexadecimal ones. :)

      If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler. -- Alfonso the Wise, 13th Century King of Castile.
      This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong. -- Iain Clarke

      T Offline
      T Offline
      toxcct
      wrote on last edited by
      #16

      you're right, i fixed it.

      [VisualCalc][Binary Guide][CommDialogs] | [Forums Guidelines]

      1 Reply Last reply
      0
      • CPalliniC CPallini

        Maybe both my local help and my windef.h file are wrong?

        If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler. -- Alfonso the Wise, 13th Century King of Castile.
        This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong. -- Iain Clarke

        R Offline
        R Offline
        Rajesh R Subramanian
        wrote on last edited by
        #17

        May be toxcct is on drugs today for a change. :laugh:

        Nobody can give you wiser advice than yourself. - Cicero .·´¯`·->Rajesh<-·´¯`·. Codeproject.com: Visual C++ MVP

        T CPalliniC 2 Replies Last reply
        0
        • R Rajesh R Subramanian

          May be toxcct is on drugs today for a change. :laugh:

          Nobody can give you wiser advice than yourself. - Cicero .·´¯`·->Rajesh<-·´¯`·. Codeproject.com: Visual C++ MVP

          T Offline
          T Offline
          toxcct
          wrote on last edited by
          #18

          Rajesh R Subramanian wrote:

          May be toxcct is on drugs today for a change

          come on, have you ever worked under linux ? Microsoft IS NOT the standard, even if 85% of the PCs worldwide are windows based... :doh:

          [VisualCalc][Binary Guide][CommDialogs] | [Forums Guidelines]

          R C 2 Replies Last reply
          0
          • T toxcct

            what ????? doesn't a Byte having 8 bits ?

            [VisualCalc][Binary Guide][CommDialogs] | [Forums Guidelines]

            C Offline
            C Offline
            Cedric Moonen
            wrote on last edited by
            #19

            toxcct wrote:

            doesn't a Byte having 8 bits

            Yes, so it is coded 0x00 to 0xFF (hexa representation) or 0b00000000 to 0b11111111 (binary representation).

            Cédric Moonen Software developer
            Charting control [v1.4]

            T 1 Reply Last reply
            0
            • T toxcct

              Rajesh R Subramanian wrote:

              May be toxcct is on drugs today for a change

              come on, have you ever worked under linux ? Microsoft IS NOT the standard, even if 85% of the PCs worldwide are windows based... :doh:

              [VisualCalc][Binary Guide][CommDialogs] | [Forums Guidelines]

              R Offline
              R Offline
              Rajesh R Subramanian
              wrote on last edited by
              #20

              toxcct wrote:

              come on, have you ever worked under linux ?

              Yes, why?

              toxcct wrote:

              Microsoft IS NOT the standard, even if 85% of the PCs worldwide are windows based... [D'Oh!]

              So, I don't get the point here. I have worked on development projects on fedora, debian and ubuntu. Linux does not have a BOOL datatype as far as I know. I say - BOOL belongs to Windows. Comments?

              Nobody can give you wiser advice than yourself. - Cicero .·´¯`·->Rajesh<-·´¯`·. Codeproject.com: Visual C++ MVP

              1 Reply Last reply
              0
              • T toxcct

                if you're coding in C, bool just don't exist (I prefer mention it, even it's obvious). in C++, bool is a native type. it weights 1 byte and takes the values 0_b_0000000**1** (true) or 0_b_0000000**0** (false). you can assign an integer to a bool. if it is different from 0, it equals the value "true", and will be automatically converted into 0_b_0000000**1** anyway. BOOL is different. it is an enum type inherited from the old C days. it's definition is like this :

                enum BOOL {
                FALSE = 0,
                TRUE
                };

                An enum is actually an int, which mean it weights 4 bytes (on a 32 bits system). apparently, Microsoft implements it in a different manner, so you have to be much more careful with it. for instance :

                //if defined like this :
                typedef int BOOL;

                //this can be a mistake :
                BOOL b = 4;
                if (b == true) {
                //never enters here
                // because 4 != 1
                }

                [VisualCalc][Binary Guide][CommDialogs] | [Forums Guidelines]

                modified on Tuesday, May 20, 2008 9:50 AM

                N Offline
                N Offline
                Nemanja Trifunovic
                wrote on last edited by
                #21

                toxcct wrote:

                if you're coding in C, bool just don't exist

                It did not exist in C89, but exists in C99[^]

                Programming Blog utf8-cpp

                1 Reply Last reply
                0
                • C Cedric Moonen

                  toxcct wrote:

                  doesn't a Byte having 8 bits

                  Yes, so it is coded 0x00 to 0xFF (hexa representation) or 0b00000000 to 0b11111111 (binary representation).

                  Cédric Moonen Software developer
                  Charting control [v1.4]

                  T Offline
                  T Offline
                  toxcct
                  wrote on last edited by
                  #22

                  yes yes, fixed already ;)

                  [VisualCalc][Binary Guide][CommDialogs] | [Forums Guidelines]

                  1 Reply Last reply
                  0
                  • T toxcct

                    Rajesh R Subramanian wrote:

                    May be toxcct is on drugs today for a change

                    come on, have you ever worked under linux ? Microsoft IS NOT the standard, even if 85% of the PCs worldwide are windows based... :doh:

                    [VisualCalc][Binary Guide][CommDialogs] | [Forums Guidelines]

                    C Offline
                    C Offline
                    Cedric Moonen
                    wrote on last edited by
                    #23

                    toxcct wrote:

                    have you ever worked under linux

                    What kind of drug is that ? ;P

                    Cédric Moonen Software developer
                    Charting control [v1.4]

                    T R 2 Replies Last reply
                    0
                    • C Cedric Moonen

                      toxcct wrote:

                      have you ever worked under linux

                      What kind of drug is that ? ;P

                      Cédric Moonen Software developer
                      Charting control [v1.4]

                      T Offline
                      T Offline
                      toxcct
                      wrote on last edited by
                      #24

                      Cedric Moonen wrote:

                      What kind of drug is that ?

                      i'd better give up there ! lol

                      [VisualCalc][Binary Guide][CommDialogs] | [Forums Guidelines]

                      1 Reply Last reply
                      0
                      • J Jhony george

                        hai all, about 'bool' i got idea... from all ur replies... but what about BOOL..? i am not clear...

                        Born to win...!

                        modified on Tuesday, May 20, 2008 11:57 PM

                        CPalliniC Offline
                        CPalliniC Offline
                        CPallini
                        wrote on last edited by
                        #25

                        BOOL is fully featured integer, for instance, you can do.

                        // WEIRD BOOL (legal) programming
                        BOOL b;
                        b = 1000;
                        b++;

                        You can't do the same with a bool variable. [added] Well, I made a sanity check, and actually VC++ compiler gives just a warning on the following code

                        bool b;
                        b = 1000; // Warning here (loss of info), at runtime b becomes true.
                        b++; // at runtime b remains true.

                        [/added] As stated by someone (Rajesh ? toxcct?) this is a reminiscence of the C language gold ol days (C has not the bool keyword). Using an int to represent Yes/No pair is simply a matter of convention (and convenience). :)

                        If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler. -- Alfonso the Wise, 13th Century King of Castile.
                        This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong. -- Iain Clarke

                        In testa che avete, signor di Ceprano?

                        T 1 Reply Last reply
                        0
                        • C Cedric Moonen

                          toxcct wrote:

                          have you ever worked under linux

                          What kind of drug is that ? ;P

                          Cédric Moonen Software developer
                          Charting control [v1.4]

                          R Offline
                          R Offline
                          Rajesh R Subramanian
                          wrote on last edited by
                          #26

                          I dunno. Azk CPallini. He'z da one who abuzez drug to answer queris realllly fazzt. He haz gud drugz and gud linkz. azk him plz. :laugh:

                          Nobody can give you wiser advice than yourself. - Cicero .·´¯`·->Rajesh<-·´¯`·. Codeproject.com: Visual C++ MVP

                          1 Reply Last reply
                          0
                          • R Rajesh R Subramanian

                            May be toxcct is on drugs today for a change. :laugh:

                            Nobody can give you wiser advice than yourself. - Cicero .·´¯`·->Rajesh<-·´¯`·. Codeproject.com: Visual C++ MVP

                            CPalliniC Offline
                            CPalliniC Offline
                            CPallini
                            wrote on last edited by
                            #27

                            I supposed too. :laugh:

                            If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler. -- Alfonso the Wise, 13th Century King of Castile.
                            This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong. -- Iain Clarke

                            In testa che avete, signor di Ceprano?

                            1 Reply Last reply
                            0
                            • CPalliniC CPallini

                              BOOL is fully featured integer, for instance, you can do.

                              // WEIRD BOOL (legal) programming
                              BOOL b;
                              b = 1000;
                              b++;

                              You can't do the same with a bool variable. [added] Well, I made a sanity check, and actually VC++ compiler gives just a warning on the following code

                              bool b;
                              b = 1000; // Warning here (loss of info), at runtime b becomes true.
                              b++; // at runtime b remains true.

                              [/added] As stated by someone (Rajesh ? toxcct?) this is a reminiscence of the C language gold ol days (C has not the bool keyword). Using an int to represent Yes/No pair is simply a matter of convention (and convenience). :)

                              If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler. -- Alfonso the Wise, 13th Century King of Castile.
                              This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong. -- Iain Clarke

                              T Offline
                              T Offline
                              toxcct
                              wrote on last edited by
                              #28

                              but one has to be careful with BOOL, as I stated at the end of my most here[^]

                              CPallini wrote:

                              C has not the bool keyword

                              looks like it has[^]

                              [VisualCalc][Binary Guide][CommDialogs] | [Forums Guidelines]

                              CPalliniC 1 Reply Last reply
                              0
                              • T toxcct

                                but one has to be careful with BOOL, as I stated at the end of my most here[^]

                                CPallini wrote:

                                C has not the bool keyword

                                looks like it has[^]

                                [VisualCalc][Binary Guide][CommDialogs] | [Forums Guidelines]

                                CPalliniC Offline
                                CPalliniC Offline
                                CPallini
                                wrote on last edited by
                                #29

                                toxcct wrote:

                                but one has to be careful with BOOL, as I stated at the end of my most here[^]

                                Indeed. C language implicit mapping of non-zero values to true and zero value to false is more coherent.

                                toxcct wrote:

                                looks like it has[^]

                                I saw it, but: shhhhhh, noone, except Nemanja, knows. :-D

                                If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler. -- Alfonso the Wise, 13th Century King of Castile.
                                This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong. -- Iain Clarke

                                In testa che avete, signor di Ceprano?

                                R 1 Reply Last reply
                                0
                                • CPalliniC CPallini

                                  toxcct wrote:

                                  but one has to be careful with BOOL, as I stated at the end of my most here[^]

                                  Indeed. C language implicit mapping of non-zero values to true and zero value to false is more coherent.

                                  toxcct wrote:

                                  looks like it has[^]

                                  I saw it, but: shhhhhh, noone, except Nemanja, knows. :-D

                                  If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler. -- Alfonso the Wise, 13th Century King of Castile.
                                  This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong. -- Iain Clarke

                                  R Offline
                                  R Offline
                                  Rajesh R Subramanian
                                  wrote on last edited by
                                  #30

                                  CPallini wrote:

                                  I saw it, but: shhhhhh, noone, except Nemanja, knows.

                                  Oh come on. You are a "C" lover. I would have expected you to know. :-D

                                  Nobody can give you wiser advice than yourself. - Cicero .·´¯`·->Rajesh<-·´¯`·. Codeproject.com: Visual C++ MVP

                                  CPalliniC 1 Reply Last reply
                                  0
                                  • R Rajesh R Subramanian

                                    CPallini wrote:

                                    I saw it, but: shhhhhh, noone, except Nemanja, knows.

                                    Oh come on. You are a "C" lover. I would have expected you to know. :-D

                                    Nobody can give you wiser advice than yourself. - Cicero .·´¯`·->Rajesh<-·´¯`·. Codeproject.com: Visual C++ MVP

                                    CPalliniC Offline
                                    CPalliniC Offline
                                    CPallini
                                    wrote on last edited by
                                    #31

                                    Well, I'm a traditional-C lover: that fancy new C99 is alien to me. :laugh:

                                    If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler. -- Alfonso the Wise, 13th Century King of Castile.
                                    This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong. -- Iain Clarke

                                    In testa che avete, signor di Ceprano?

                                    J 1 Reply Last reply
                                    0
                                    • CPalliniC CPallini

                                      Well, I'm a traditional-C lover: that fancy new C99 is alien to me. :laugh:

                                      If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler. -- Alfonso the Wise, 13th Century King of Castile.
                                      This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong. -- Iain Clarke

                                      J Offline
                                      J Offline
                                      Jhony george
                                      wrote on last edited by
                                      #32

                                      Thanks for ur kind reply to all members whoever particpated in the discussion., by, Manivannan@Congruent

                                      Born to win...!

                                      1 Reply Last reply
                                      0
                                      Reply
                                      • Reply as topic
                                      Log in to reply
                                      • Oldest to Newest
                                      • Newest to Oldest
                                      • Most Votes


                                      • Login

                                      • Don't have an account? Register

                                      • Login or register to search.
                                      • First post
                                        Last post
                                      0
                                      • Categories
                                      • Recent
                                      • Tags
                                      • Popular
                                      • World
                                      • Users
                                      • Groups