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C++ trivia

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  • W W Balboos GHB

    Just to be on the safe side, be sure to consider this is the most distinct use of the colon.[^]

    Ravings en masse^

    "The difference between genius and stupidity is that genius has its limits." - Albert Einstein

    "If you are searching for perfection in others, then you seek disappointment. If you seek perfection in yourself, then you will find failure." - Balboos HaGadol Mar 2010

    OriginalGriffO Offline
    OriginalGriffO Offline
    OriginalGriff
    wrote on last edited by
    #13

    I was going to say, "to write VB code because only ... " but he beat me too it ... :-D

    "I have no idea what I did, but I'm taking full credit for it." - ThisOldTony "Common sense is so rare these days, it should be classified as a super power" - Random T-shirt AntiTwitter: @DalekDave is now a follower!

    "I have no idea what I did, but I'm taking full credit for it." - ThisOldTony
    "Common sense is so rare these days, it should be classified as a super power" - Random T-shirt

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    • H honey the codewitch

      i forgot labels. So now that's two things i forgot

      Real programmers use butterflies

      T Offline
      T Offline
      TheGreatAndPowerfulOz
      wrote on last edited by
      #14

      global scope operator, as in ::foo

      #SupportHeForShe Government can give you nothing but what it takes from somebody else. A government big enough to give you everything you want is big enough to take everything you've got, including your freedom.-Ezra Taft Benson You must accept 1 of 2 basic premises: Either we are alone in the universe or we are not alone. Either way, the implications are staggering!-Wernher von Braun

      H 1 Reply Last reply
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      • T TheGreatAndPowerfulOz

        global scope operator, as in ::foo

        #SupportHeForShe Government can give you nothing but what it takes from somebody else. A government big enough to give you everything you want is big enough to take everything you've got, including your freedom.-Ezra Taft Benson You must accept 1 of 2 basic premises: Either we are alone in the universe or we are not alone. Either way, the implications are staggering!-Wernher von Braun

        H Offline
        H Offline
        honey the codewitch
        wrote on last edited by
        #15

        I presumed that was implied when i mentioned the namespace scope resolution operator (it's the same operator) :)

        Real programmers use butterflies

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        • H honey the codewitch

          I presumed that was implied when i mentioned the namespace scope resolution operator (it's the same operator) :)

          Real programmers use butterflies

          H Offline
          H Offline
          Helena Munzarova
          wrote on last edited by
          #16

          In a ternary oparator

          sResult=(x<=0)?"0 or negative":"positive";

          H 1 Reply Last reply
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          • Greg UtasG Greg Utas

            List the distinct uses for a colon in C++. Motivated by currently writing a function that had better take all of them into account! :-D

            Robust Services Core | Software Techniques for Lemmings | Articles
            The fox knows many things, but the hedgehog knows one big thing.

            G Offline
            G Offline
            Gary Wheeler
            wrote on last edited by
            #17

            To keep my gastroenterologist in BMW's? Oh wait, wrong colon; my bad.

            Software Zen: delete this;

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            • H honey the codewitch

              static member access, constructor initialization list. Base class list, namespace access, ternary operator, case signifier terminator. I feel like there are more but I'm sleepy. edit: other commenters pointed out labels and bitfields Don't forget to escape strings and chars!

              Real programmers use butterflies

              J Offline
              J Offline
              jason_s_coleman
              wrote on last edited by
              #18

              Range-based for loop?

              H 1 Reply Last reply
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              • H Helena Munzarova

                In a ternary oparator

                sResult=(x<=0)?"0 or negative":"positive";

                H Offline
                H Offline
                honey the codewitch
                wrote on last edited by
                #19

                i already mentioned that.

                Real programmers use butterflies

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                • J jason_s_coleman

                  Range-based for loop?

                  H Offline
                  H Offline
                  honey the codewitch
                  wrote on last edited by
                  #20

                  is that a C++20 thing?

                  Real programmers use butterflies

                  J 1 Reply Last reply
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                  • H honey the codewitch

                    is that a C++20 thing?

                    Real programmers use butterflies

                    J Offline
                    J Offline
                    jason_s_coleman
                    wrote on last edited by
                    #21

                    Nah, looks like C++11. e.g. for (auto it : vector) Range-based for loop (since C++11) - cppreference.com[^]

                    H 1 Reply Last reply
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                    • J jason_s_coleman

                      Nah, looks like C++11. e.g. for (auto it : vector) Range-based for loop (since C++11) - cppreference.com[^]

                      H Offline
                      H Offline
                      honey the codewitch
                      wrote on last edited by
                      #22

                      huh. I've never actually used that..

                      Real programmers use butterflies

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                      • H honey the codewitch

                        static member access, constructor initialization list. Base class list, namespace access, ternary operator, case signifier terminator. I feel like there are more but I'm sleepy. edit: other commenters pointed out labels and bitfields Don't forget to escape strings and chars!

                        Real programmers use butterflies

                        S Offline
                        S Offline
                        scedastic
                        wrote on last edited by
                        #23

                        Some of those are double colons. Are we counting them as well?

                        H 1 Reply Last reply
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                        • S scedastic

                          Some of those are double colons. Are we counting them as well?

                          H Offline
                          H Offline
                          honey the codewitch
                          wrote on last edited by
                          #24

                          i did, because of the way the original question was worded.

                          Real programmers use butterflies

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                          • Greg UtasG Greg Utas

                            List the distinct uses for a colon in C++. Motivated by currently writing a function that had better take all of them into account! :-D

                            Robust Services Core | Software Techniques for Lemmings | Articles
                            The fox knows many things, but the hedgehog knows one big thing.

                            P Offline
                            P Offline
                            progammer4you
                            wrote on last edited by
                            #25

                            Hi. I would like to help with the answer to your question. First, one colon is used to indicate the base class when inheriting from classes. Second, a single colon is used to specify the initialization list for the constructor. The two colons are the scoping operator.
                            Used to access the elements of the namespace. But in this matter, the editors of this site are more competent. Read more here: [url=https://sirinsoftware.com/services/iot-development/\]https://sirinsoftware.com/services/iot-development/\[/url\]

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