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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

    T Offline
    T Offline
    toxcct
    wrote on last edited by
    #13

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

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

    CPalliniC C 2 Replies Last reply
    0
    • 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
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        • 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
          #16

          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
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          • 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
            #17

            you're right, i fixed it.

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

            1 Reply Last reply
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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

                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
                #19

                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

                  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
                  #20

                  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
                    #21

                    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
                    • 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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