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  4. bool and BOOL

bool and BOOL

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  • 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
          • 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
            #22

            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:

              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
              #23

              yes yes, fixed already ;)

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

              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]

                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
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