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bool and BOOL

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  • CPalliniC CPallini

    toxcct wrote:

    0x00000001 (true) or 0x00000000 (false).

    Uhmmmmmmmmmmm. Never seen a byte having so much hex digits...:-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

    J Offline
    J Offline
    Jhony george
    wrote on last edited by
    #14

    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 1 Reply Last reply
    0
    • 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
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