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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 C 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]

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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]

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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]

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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]

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            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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              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.

                C 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.

                    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

                    J 1 Reply Last reply
                    0
                    • 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

                      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]

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                        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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                            • 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
                              #18

                              hehehhehe!!! :laugh:

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

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