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  4. Converting string to bool

Converting string to bool

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  • T toxcct

    you misunderstood me. I meant what is contained within that string ? 1/0 ? true/false ? checked/unchecked ? white/black ?

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

    C Offline
    C Offline
    Cedric Moonen
    wrote on last edited by
    #9

    true/false :) (well, that what he said in his post)

    Cédric Moonen Software developer
    Charting control [v1.4]

    T 1 Reply Last reply
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    • C Cedric Moonen

      true/false :) (well, that what he said in his post)

      Cédric Moonen Software developer
      Charting control [v1.4]

      T Offline
      T Offline
      toxcct
      wrote on last edited by
      #10

      I prefer to be sure... :-D

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

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      • C CPallini

        what about

        bool f = temp == "true";

        :)

        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
        Jijo Raj
        wrote on last edited by
        #11

        You still remember it. :laugh: Regards, Jijo.

        _____________________________________________________ http://weseetips.com[^] Visual C++ tips and tricks. Updated daily.

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        • P pl_kode

          Thanks for the reply. This can be done. But instead I am looking for some function that does this like atoi() or itoa() for string to int and vice versa. Is there any function for strings to bool.

          C Offline
          C Offline
          Cedric Moonen
          wrote on last edited by
          #12

          pl_kode wrote:

          But instead I am looking for some function that does this like atoi() or itoa() for string to int and vice versa

          Why ? That's quite simple, why do you want to use an existing function for that ?

          pl_kode wrote:

          Is there any function for strings to bool.

          Not as far as I know.

          Cédric Moonen Software developer
          Charting control [v1.4]

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          • J Jijo Raj

            You still remember it. :laugh: Regards, Jijo.

            _____________________________________________________ http://weseetips.com[^] Visual C++ tips and tricks. Updated daily.

            C Offline
            C Offline
            CPallini
            wrote on last edited by
            #13

            Well I forgot for a while, but then suddenly I spotted you vulture ;P ready for hitting me! :-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

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            • P pl_kode

              Thanks for the reply. This can be done. But instead I am looking for some function that does this like atoi() or itoa() for string to int and vice versa. Is there any function for strings to bool.

              C Offline
              C Offline
              CPallini
              wrote on last edited by
              #14

              Good news: it exists, is atob. The bad news is that you have to code it (anyway you got so many hints about). :-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

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              • T toxcct

                you misunderstood me. I meant what is contained within that string ? 1/0 ? true/false ? checked/unchecked ? white/black ?

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

                P Offline
                P Offline
                pl_kode
                wrote on last edited by
                #15

                true/ false is stored in that

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                • P pl_kode

                  I am getting a string from map that can be either true or false. Is there any function or some alternative to convert this string into bool. So that I can store it in a bool variable.

                  string temp;
                  temp=MyMap.find("Check")->second; // give either true or false

                  I want to convert temp to bool. THANKS.

                  S Offline
                  S Offline
                  sudhir_Kumar
                  wrote on last edited by
                  #16

                  bool bVal = (temp == "true"?true:false);

                  -@SuDhIrKuMaR@-

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                  • C CPallini

                    Well I forgot for a while, but then suddenly I spotted you vulture ;P ready for hitting me! :-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
                    Jijo Raj
                    wrote on last edited by
                    #17

                    hehehhehe!!! :laugh:

                    _____________________________________________________ http://weseetips.com[^] Visual C++ tips and tricks. Updated daily.

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                    • S sudhir_Kumar

                      bool bVal = (temp == "true"?true:false);

                      -@SuDhIrKuMaR@-

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

                      why do you need the ?: operator ? the std::string::operator==() already returns a bool. in the same direction, why wouldn't you write this then :

                      bool bVal = ((temp == "true") == true ? true : false)

                      or

                      bool bVal = (((temp == "true") == true) == true ? true : false)

                      or just

                      bool bVal = (temp == "true")

                      ;P

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

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