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Edit Box Variables

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  • C Cam

    Ok, please re-read my reply if you haven't seen what I appended to it. Another thing I would recommend doing is in the resource editor (where you can edit your dialog box), right click your edit boxes, click the 'Styles' tab, and check 'Number'. Then only numbers can be typed into the box. That's no explanation for your compiling errors, but it will save you time later, so you won't have to write error-checking routines to make sure your user typed in a number. If all else fails, make sure to check out the sample prog I linked to in my last post. ~Cam Desautels

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    L Offline
    Lost User
    wrote on last edited by
    #6

    Cam, I really appreciate all your assistance. I hoipe to repay you someday somehow. I downloaded the file you attatched and after it downloaded I tried unzipping it and received the error message "file is multipart or corrupt. Thank you for the attempt.

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    • L Lost User

      I'm very new to C++ and need to build a program that performs simple multiplication in edit boxes, there are three allowing the user to enter numerals in 2 and the result being displayed in the third. My problem is, I cannot for the life of me figure out how to correct a mistake I must have made. I keep getting the errors:"error C2440: '=' : cannot convert from 'char [1]' to 'float'". I assume I am supposed to convert somehow the inputs from char to float. Any assistance would be appreciated. I was told by someone something about atoi atof, and have searched for these things in my MSDN to no avail. Am I maybe declaring my variables wrong?:confused:

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      R Offline
      Rick York
      wrote on last edited by
      #7

      You might want to have a look at this little article. It is a set of classes built to take numeric input from edit boxes and it handles a lot of those messy details for you. There are facilities to use sliders also but you don't have to. I hope this helps.

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      • L Lost User

        Cam, I really appreciate all your assistance. I hoipe to repay you someday somehow. I downloaded the file you attatched and after it downloaded I tried unzipping it and received the error message "file is multipart or corrupt. Thank you for the attempt.

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        C Offline
        Cam
        wrote on last edited by
        #8

        drat...sorry about that. I'm uploading the corrected version of the file right now. It ought to be at the same exact location by the time you recieve this, so just follow the original link if you'd like to download it. ~Cam Desautels (BinaryUprising.com)

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        • R Rick York

          You might want to have a look at this little article. It is a set of classes built to take numeric input from edit boxes and it handles a lot of those messy details for you. There are facilities to use sliders also but you don't have to. I hope this helps.

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          C Offline
          Cam
          wrote on last edited by
          #9

          But it's so simple, really. And the point is to learn. Once he gets it down he'll be pumping these things out in no time, and wondering what was slowin' him down before. ~Cam Desautels (BinaryUprising.com)

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          • C Cam

            But it's so simple, really. And the point is to learn. Once he gets it down he'll be pumping these things out in no time, and wondering what was slowin' him down before. ~Cam Desautels (BinaryUprising.com)

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            L Offline
            Lost User
            wrote on last edited by
            #10

            You guys are awesome, Thanks for your help!!:-D

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            • L Lost User

              You guys are awesome, Thanks for your help!!:-D

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              Cam
              wrote on last edited by
              #11

              Did you get it working??? ~Cam Desautels (BinaryUprising.com)

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              • L Lost User

                I am taking a little course in C++ and my instructor tols me that my problem has to do with the way I am declaring my variables. I used the class wizard and made the variables as catagory Value, and Variable type float. I made sure my Updatedata(); commands were right, and I still get these errors. Since we haven't covered the atoi/atof topics yet I assume the problem is how the variables or functions are declared. This is pretty stressful, considering I'd like to get this right so I can be where you are and help someone later on. Is there anything else I might be overlooking? I really appreciate your assistance. Thanks.:confused:

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                C Offline
                Christian Graus
                wrote on last edited by
                #12

                If you made the variables of type float, then you need to make sure that only numbers are being entered into the edit boxes. Sadly, if you click the option in the edit box properties to make the value a number, you will only get int's, the decimal point will also be supressed. You really should consider posting some code when asking for help. I suspect if I saw the code I'd probably know what you were doing wrong. Christian After all, there's nothing wrong with an elite as long as I'm allowed to be part of it!! - Mike Burston Oct 23, 2001

                Sonork ID 100.10002:MeanManOz

                I live in Bob's HungOut now

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                • C Cam

                  Did you get it working??? ~Cam Desautels (BinaryUprising.com)

                  L Offline
                  L Offline
                  Lost User
                  wrote on last edited by
                  #13

                  Cam, I'm sorry I didn't say. Yes, I got it owkring. Thanks a lot for your help! It's impressive to see that there are people out there that seem to REALLY care. Your code and that srticle that Rich sent me to set me right. THANKS! By the way, GREAT web site!

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                  0
                  • L Lost User

                    I am taking a little course in C++ and my instructor tols me that my problem has to do with the way I am declaring my variables. I used the class wizard and made the variables as catagory Value, and Variable type float. I made sure my Updatedata(); commands were right, and I still get these errors. Since we haven't covered the atoi/atof topics yet I assume the problem is how the variables or functions are declared. This is pretty stressful, considering I'd like to get this right so I can be where you are and help someone later on. Is there anything else I might be overlooking? I really appreciate your assistance. Thanks.:confused:

                    C Offline
                    C Offline
                    Christian Graus
                    wrote on last edited by
                    #14

                    If you made the variables of type float, then you need to make sure that only numbers are being entered into the edit boxes. Sadly, if you click the option in the edit box properties to make the value a number, you will only get int's, the decimal point will also be supressed. However, if the values are ALL set to be floats, there is no char to float conversion happening at ALL, so I doubt you've got that bit right, or if you have, the problem is elsewhere and you should be posting the code where it crashes. You really should consider posting some code when asking for help. I suspect if I saw the code I'd probably know what you were doing wrong. Christian After all, there's nothing wrong with an elite as long as I'm allowed to be part of it!! - Mike Burston Oct 23, 2001

                    Sonork ID 100.10002:MeanManOz

                    I live in Bob's HungOut now

                    C 1 Reply Last reply
                    0
                    • L Lost User

                      Cam, I'm sorry I didn't say. Yes, I got it owkring. Thanks a lot for your help! It's impressive to see that there are people out there that seem to REALLY care. Your code and that srticle that Rich sent me to set me right. THANKS! By the way, GREAT web site!

                      L Offline
                      L Offline
                      Lost User
                      wrote on last edited by
                      #15

                      Sorry about the typos, I'm pretty tired now.

                      1 Reply Last reply
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                      • L Lost User

                        Cam, I'm sorry I didn't say. Yes, I got it owkring. Thanks a lot for your help! It's impressive to see that there are people out there that seem to REALLY care. Your code and that srticle that Rich sent me to set me right. THANKS! By the way, GREAT web site!

                        L Offline
                        L Offline
                        Lost User
                        wrote on last edited by
                        #16

                        Sorry about the typos, I'm really tired now. Good night

                        1 Reply Last reply
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                        • C Christian Graus

                          If you made the variables of type float, then you need to make sure that only numbers are being entered into the edit boxes. Sadly, if you click the option in the edit box properties to make the value a number, you will only get int's, the decimal point will also be supressed. You really should consider posting some code when asking for help. I suspect if I saw the code I'd probably know what you were doing wrong. Christian After all, there's nothing wrong with an elite as long as I'm allowed to be part of it!! - Mike Burston Oct 23, 2001

                          Sonork ID 100.10002:MeanManOz

                          I live in Bob's HungOut now

                          L Offline
                          L Offline
                          Lost User
                          wrote on last edited by
                          #17

                          Christian, Thanks an aweful lot for helping me. I REALLY appreciate it.

                          1 Reply Last reply
                          0
                          • C Christian Graus

                            If you made the variables of type float, then you need to make sure that only numbers are being entered into the edit boxes. Sadly, if you click the option in the edit box properties to make the value a number, you will only get int's, the decimal point will also be supressed. However, if the values are ALL set to be floats, there is no char to float conversion happening at ALL, so I doubt you've got that bit right, or if you have, the problem is elsewhere and you should be posting the code where it crashes. You really should consider posting some code when asking for help. I suspect if I saw the code I'd probably know what you were doing wrong. Christian After all, there's nothing wrong with an elite as long as I'm allowed to be part of it!! - Mike Burston Oct 23, 2001

                            Sonork ID 100.10002:MeanManOz

                            I live in Bob's HungOut now

                            C Offline
                            C Offline
                            Cam
                            wrote on last edited by
                            #18

                            True, true, sorry about that...int math was simpler... ~Cam Desautels (BinaryUprising.com)

                            1 Reply Last reply
                            0
                            • L Lost User

                              Cam, I'm sorry I didn't say. Yes, I got it owkring. Thanks a lot for your help! It's impressive to see that there are people out there that seem to REALLY care. Your code and that srticle that Rich sent me to set me right. THANKS! By the way, GREAT web site!

                              C Offline
                              C Offline
                              Cam
                              wrote on last edited by
                              #19

                              Ok, very cool, very cool...no problem about the help, I'm a struggling C++ programmer myself (yeah, but what the heck, I'm 17, it'll come...), and if I help others with what I can, maybe someone can help me when the time comes. Thanks a lot about my site, I have a lot of fun with webdev. Did you see there's a little text box on the right-hand side of the homepage where you can post comments (hint, hint). LOL, anyway, the best of luck to you, I'm glad I could help. ~Cam Desautels (BinaryUprising.com)

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