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  4. Converting string to bool

Converting string to bool

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  • C Cedric Moonen

    bool bChecked = false;
    if (temp == "true")
    bChecked = true;

    :~. You have to check for the case also but you got the idea.

    Cédric Moonen Software developer
    Charting control [v1.4]

    P Offline
    P Offline
    pl_kode
    wrote on last edited by
    #5

    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.

    T C CPalliniC 3 Replies Last reply
    0
    • T toxcct

      what kind of strings are supposed to be stored in MyMap.find("Check")->second ? I mean, you'll have to test programmatically the string to assign another boolean variable to true or false...

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

      C Offline
      C Offline
      Cedric Moonen
      wrote on last edited by
      #6

      toxcct wrote:

      what kind of strings are supposed to be stored in MyMap.find("Check")->second ?

      From his snippet of code, I would say std::string.

      Cédric Moonen Software developer
      Charting control [v1.4]

      T 1 Reply Last reply
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      • C Cedric Moonen

        toxcct wrote:

        what kind of strings are supposed to be stored in MyMap.find("Check")->second ?

        From his snippet of code, I would say std::string.

        Cédric Moonen Software developer
        Charting control [v1.4]

        T Offline
        T Offline
        toxcct
        wrote on last edited by
        #7

        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 P 2 Replies Last reply
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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.

          T Offline
          T Offline
          toxcct
          wrote on last edited by
          #8

          please reply to this question[^] first before we can reply to you efficiently

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

          1 Reply Last reply
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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]

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              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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              • CPalliniC 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.

                CPalliniC 1 Reply Last reply
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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]

                  1 Reply Last reply
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                  • J Jijo Raj

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

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

                    CPalliniC Offline
                    CPalliniC 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

                    In testa che avete, signor di Ceprano?

                    J 1 Reply Last reply
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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.

                      CPalliniC Offline
                      CPalliniC 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

                      In testa che avete, signor di Ceprano?

                      1 Reply Last reply
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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@-

                          T 1 Reply Last reply
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                          • S sudhir_Kumar

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

                            -@SuDhIrKuMaR@-

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                            T Offline
                            toxcct
                            wrote on last edited by
                            #17

                            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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                            • CPalliniC 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
                              #18

                              hehehhehe!!! :laugh:

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

                              1 Reply Last reply
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