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Error unknown typ name 'DS18B20'

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  • mrjjM mrjj

    @AlexKrammer

    Yes if you want BOTH to change you should set both.
    both in C.xxx and directly with S/R in mainwindow :)

    A Offline
    A Offline
    AlexKrammer
    wrote on last edited by AlexKrammer
    #72

    @mrjj
    i dont understand haha.
    how and where should i set both?

    And what do you mean with C.xxx the only thing that i have in the class CheckTemperature is the methode CheckTemp

    mrjjM 1 Reply Last reply
    0
    • A AlexKrammer

      @mrjj
      i dont understand haha.
      how and where should i set both?

      And what do you mean with C.xxx the only thing that i have in the class CheckTemperature is the methode CheckTemp

      mrjjM Offline
      mrjjM Offline
      mrjj
      Lifetime Qt Champion
      wrote on last edited by
      #73

      @AlexKrammer
      Ok i not sure i understand what you really want either. :)
      Its feels like you expect something magical to happen to the C.s/R.r

      • And what do you mean with C.xxx the only thing that i have in the class CheckTemperature is the methode CheckTemp

      i mean what ever you want to set in the class.
      maybe its C.s instead.

      A 1 Reply Last reply
      0
      • mrjjM mrjj

        @AlexKrammer
        Ok i not sure i understand what you really want either. :)
        Its feels like you expect something magical to happen to the C.s/R.r

        • And what do you mean with C.xxx the only thing that i have in the class CheckTemperature is the methode CheckTemp

        i mean what ever you want to set in the class.
        maybe its C.s instead.

        A Offline
        A Offline
        AlexKrammer
        wrote on last edited by
        #74

        @mrjj
        hahaha :D

        nobody knows anything yet :D

        Summery:
        First i got one Class called SetTemperature.
        In that class is a variable HystTemperature.
        In order to change the value of that variable you need to create a object of Set Temperature like:

        SetTemperature S;
        S.setHystTemperature(e.g. 5);
        

        to receive that variable you also use:

        float x;
        Set Temperature S;
        x = S.getHystTemperature();
        

        The second class called "ReadTemperature" got one methode to evaluate the temperature and save it in the class variable actualTemp1. First you have to create an object of the class like:

        ReadTemperature R;
        R.ReadTemp(1);
        //Then actualTemp1 will be changed e.g. incremented by 1
        

        Then the third class should compare that both variables. So i have to create 2 object of each class and call the variables like:

        float x;
        float y;
        
        SetTemperature S;
        ReadTemperature R;
        
        x = S.getHystTemperature();
        y = R.actualTemp1;
        

        thats the only thing i want.
        But what do you mean e.g. with C.S.getHystTemperature() and so on?
        Where do you take de C.S.getHystTemperature()? and what should it do?

        Also with

        auto value2 = R.actualTemp1;
        C.R.actualTemp1 = value2;
        

        Where comes and what is C.R.actualTemp1^^

        mrjjM 1 Reply Last reply
        0
        • A AlexKrammer

          @mrjj
          hahaha :D

          nobody knows anything yet :D

          Summery:
          First i got one Class called SetTemperature.
          In that class is a variable HystTemperature.
          In order to change the value of that variable you need to create a object of Set Temperature like:

          SetTemperature S;
          S.setHystTemperature(e.g. 5);
          

          to receive that variable you also use:

          float x;
          Set Temperature S;
          x = S.getHystTemperature();
          

          The second class called "ReadTemperature" got one methode to evaluate the temperature and save it in the class variable actualTemp1. First you have to create an object of the class like:

          ReadTemperature R;
          R.ReadTemp(1);
          //Then actualTemp1 will be changed e.g. incremented by 1
          

          Then the third class should compare that both variables. So i have to create 2 object of each class and call the variables like:

          float x;
          float y;
          
          SetTemperature S;
          ReadTemperature R;
          
          x = S.getHystTemperature();
          y = R.actualTemp1;
          

          thats the only thing i want.
          But what do you mean e.g. with C.S.getHystTemperature() and so on?
          Where do you take de C.S.getHystTemperature()? and what should it do?

          Also with

          auto value2 = R.actualTemp1;
          C.R.actualTemp1 = value2;
          

          Where comes and what is C.R.actualTemp1^^

          mrjjM Offline
          mrjjM Offline
          mrjj
          Lifetime Qt Champion
          wrote on last edited by mrjj
          #75

          @AlexKrammer
          hehe lots of talk for 2 floats :)
          Ok first part i fully understand. seems fine.
          but not sure what you need the C class for then ?

          I dont understand when you will update ITs C/S and such.
          Maybe just drop C completely and do what you want to do with C/S in mainWin ?

          A 1 Reply Last reply
          0
          • mrjjM mrjj

            @AlexKrammer
            hehe lots of talk for 2 floats :)
            Ok first part i fully understand. seems fine.
            but not sure what you need the C class for then ?

            I dont understand when you will update ITs C/S and such.
            Maybe just drop C completely and do what you want to do with C/S in mainWin ?

            A Offline
            A Offline
            AlexKrammer
            wrote on last edited by
            #76

            @mrjj
            yes it should be possible.
            But to keep the structur and let it look quiet professional i'd tried to put it into a class.
            But the one thing that i dont understand yet is. If i create a object each class in CheckTemp and try to call the variables out of them. why they dont include the values which i gave them e.g when the slider moved.

            mrjjM 1 Reply Last reply
            0
            • A AlexKrammer

              @mrjj
              yes it should be possible.
              But to keep the structur and let it look quiet professional i'd tried to put it into a class.
              But the one thing that i dont understand yet is. If i create a object each class in CheckTemp and try to call the variables out of them. why they dont include the values which i gave them e.g when the slider moved.

              mrjjM Offline
              mrjjM Offline
              mrjj
              Lifetime Qt Champion
              wrote on last edited by
              #77

              @AlexKrammer said in Error unknown typ name 'DS18B20':

              But the one thing that i dont understand yet is. If i create a object each class in CheckTemp and try to call the variables out of them. why they dont include the values which i gave them e.g when the slider moved.

              Because they are NOT tied to the S/R in main. its own variables and unless you
              directly write to them via C.s then they stay at zero.

              So when you change C/S that lives in main, the ones in C does not change with them
              They are seperate variables and has own values and will only change if you directly do that.

              much like

              int NUM =4;

              class Test {
              int NUM=0;
              }

              TEST c;

              NUM = 100;

              will have not change c.NUM at all.

              A 2 Replies Last reply
              2
              • mrjjM mrjj

                @AlexKrammer said in Error unknown typ name 'DS18B20':

                But the one thing that i dont understand yet is. If i create a object each class in CheckTemp and try to call the variables out of them. why they dont include the values which i gave them e.g when the slider moved.

                Because they are NOT tied to the S/R in main. its own variables and unless you
                directly write to them via C.s then they stay at zero.

                So when you change C/S that lives in main, the ones in C does not change with them
                They are seperate variables and has own values and will only change if you directly do that.

                much like

                int NUM =4;

                class Test {
                int NUM=0;
                }

                TEST c;

                NUM = 100;

                will have not change c.NUM at all.

                A Offline
                A Offline
                AlexKrammer
                wrote on last edited by
                #78
                This post is deleted!
                1 Reply Last reply
                0
                • mrjjM mrjj

                  @AlexKrammer said in Error unknown typ name 'DS18B20':

                  But the one thing that i dont understand yet is. If i create a object each class in CheckTemp and try to call the variables out of them. why they dont include the values which i gave them e.g when the slider moved.

                  Because they are NOT tied to the S/R in main. its own variables and unless you
                  directly write to them via C.s then they stay at zero.

                  So when you change C/S that lives in main, the ones in C does not change with them
                  They are seperate variables and has own values and will only change if you directly do that.

                  much like

                  int NUM =4;

                  class Test {
                  int NUM=0;
                  }

                  TEST c;

                  NUM = 100;

                  will have not change c.NUM at all.

                  A Offline
                  A Offline
                  AlexKrammer
                  wrote on last edited by AlexKrammer
                  #79

                  @mrjj
                  yeah but i dont write NUM = 100.
                  I write c.NUM = 100.

                  i write:

                  class TEST{
                      int NUM = 0;
                  }
                  
                  MainWindow{
                  TEST c;
                  c.NUM = 100;
                  }
                  
                  CheckTemperature
                  {
                       float example;
                       TEST c;
                       example  = c.NUM;
                       //example still 0
                  }
                  
                  
                  
                  mrjjM 1 Reply Last reply
                  0
                  • A AlexKrammer

                    @mrjj
                    yeah but i dont write NUM = 100.
                    I write c.NUM = 100.

                    i write:

                    class TEST{
                        int NUM = 0;
                    }
                    
                    MainWindow{
                    TEST c;
                    c.NUM = 100;
                    }
                    
                    CheckTemperature
                    {
                         float example;
                         TEST c;
                         example  = c.NUM;
                         //example still 0
                    }
                    
                    
                    
                    mrjjM Offline
                    mrjjM Offline
                    mrjj
                    Lifetime Qt Champion
                    wrote on last edited by
                    #80

                    @AlexKrammer
                    Yes and then its ok. then you update c.num but NOT
                    the NUM outside.
                    Its 100% the same with your SetTemperature/ReadTemperature
                    in MainWin and those in C.

                    A 1 Reply Last reply
                    0
                    • mrjjM mrjj

                      @AlexKrammer
                      Yes and then its ok. then you update c.num but NOT
                      the NUM outside.
                      Its 100% the same with your SetTemperature/ReadTemperature
                      in MainWin and those in C.

                      A Offline
                      A Offline
                      AlexKrammer
                      wrote on last edited by
                      #81

                      @mrjj
                      i dont want to update NUM outside..
                      look one post above. I edited it

                      mrjjM 1 Reply Last reply
                      0
                      • A AlexKrammer

                        @mrjj
                        i dont want to update NUM outside..
                        look one post above. I edited it

                        mrjjM Offline
                        mrjjM Offline
                        mrjj
                        Lifetime Qt Champion
                        wrote on last edited by
                        #82

                        @AlexKrammer

                        CheckTemperature
                        {
                             float example;
                             TEST c;
                             example  = c.NUM;
                             //example still 0
                        }
                        

                        Yes as you make a local TEST c variable
                        so if you did if you did c.NUM=100
                        somewhere else its not the same TEST instance.

                        So TEST c; should be a member if you want to set its NUM outside of CheckTemperature

                        then it works.

                        A 1 Reply Last reply
                        2
                        • mrjjM mrjj

                          @AlexKrammer

                          CheckTemperature
                          {
                               float example;
                               TEST c;
                               example  = c.NUM;
                               //example still 0
                          }
                          

                          Yes as you make a local TEST c variable
                          so if you did if you did c.NUM=100
                          somewhere else its not the same TEST instance.

                          So TEST c; should be a member if you want to set its NUM outside of CheckTemperature

                          then it works.

                          A Offline
                          A Offline
                          AlexKrammer
                          wrote on last edited by
                          #83

                          @mrjj
                          yes i did it?
                          i created a object of Test in MainWindow
                          then i put c.NUM = 100;

                          after that i created a object of Test in CheckTemperature too
                          but c.NUM dont have 100. Its still have 0.

                          jsulmJ 1 Reply Last reply
                          0
                          • A AlexKrammer

                            @mrjj
                            yes i did it?
                            i created a object of Test in MainWindow
                            then i put c.NUM = 100;

                            after that i created a object of Test in CheckTemperature too
                            but c.NUM dont have 100. Its still have 0.

                            jsulmJ Offline
                            jsulmJ Offline
                            jsulm
                            Lifetime Qt Champion
                            wrote on last edited by
                            #84

                            @AlexKrammer So, you create two instances of Test, change one of them and expect the other one to have the same change? How? By magic? Maybe I don't get something as the thread is already quite long...

                            Test a;
                            Test b;
                            a.NUM = 100;
                            // Why should b.NUM be 100 now?!
                            

                            https://forum.qt.io/topic/113070/qt-code-of-conduct

                            A 1 Reply Last reply
                            1
                            • jsulmJ jsulm

                              @AlexKrammer So, you create two instances of Test, change one of them and expect the other one to have the same change? How? By magic? Maybe I don't get something as the thread is already quite long...

                              Test a;
                              Test b;
                              a.NUM = 100;
                              // Why should b.NUM be 100 now?!
                              
                              A Offline
                              A Offline
                              AlexKrammer
                              wrote on last edited by AlexKrammer
                              #85

                              @jsulm
                              where do i create two instaces of Test? I only create a Object of TEST with c. change the Variable NUM and try to get c.NUM in a other Class

                              class TEST{
                              int NUM = 0;
                              }

                              MainWindow{
                              TEST c;
                              c.NUM = 100;
                              }

                              CheckTemperature
                              {
                              float example;
                              TEST c;
                              example = c.NUM;
                              //example still 0
                              }

                              Or do i change the value of the variable in the object TEST c (c.NUM) i created? Not the Variable in the class TEST

                              jsulmJ 1 Reply Last reply
                              0
                              • A AlexKrammer

                                @jsulm
                                where do i create two instaces of Test? I only create a Object of TEST with c. change the Variable NUM and try to get c.NUM in a other Class

                                class TEST{
                                int NUM = 0;
                                }

                                MainWindow{
                                TEST c;
                                c.NUM = 100;
                                }

                                CheckTemperature
                                {
                                float example;
                                TEST c;
                                example = c.NUM;
                                //example still 0
                                }

                                Or do i change the value of the variable in the object TEST c (c.NUM) i created? Not the Variable in the class TEST

                                jsulmJ Offline
                                jsulmJ Offline
                                jsulm
                                Lifetime Qt Champion
                                wrote on last edited by jsulm
                                #86

                                @AlexKrammer said in Error unknown typ name 'DS18B20':

                                where do i create two instaces of Test?

                                In the code you just posted (hint: instance is the same thing as object):

                                MainWindow{
                                TEST c; // First instance
                                c.NUM = 100;
                                }
                                
                                CheckTemperature
                                {
                                float example;
                                TEST c; // Second instance, c here is NOT the same as in MainWindow!
                                example = c.NUM;
                                //example still 0
                                }
                                

                                https://forum.qt.io/topic/113070/qt-code-of-conduct

                                mrjjM 1 Reply Last reply
                                2
                                • jsulmJ jsulm

                                  @AlexKrammer said in Error unknown typ name 'DS18B20':

                                  where do i create two instaces of Test?

                                  In the code you just posted (hint: instance is the same thing as object):

                                  MainWindow{
                                  TEST c; // First instance
                                  c.NUM = 100;
                                  }
                                  
                                  CheckTemperature
                                  {
                                  float example;
                                  TEST c; // Second instance, c here is NOT the same as in MainWindow!
                                  example = c.NUM;
                                  //example still 0
                                  }
                                  
                                  mrjjM Offline
                                  mrjjM Offline
                                  mrjj
                                  Lifetime Qt Champion
                                  wrote on last edited by
                                  #87

                                  @jsulm said in Error unknown typ name 'DS18B20':

                                  TEST c; // First instance

                                  This has to go in .h , in the MainWindow class and then

                                  TEST c; // Second instance, has to be removed then
                                  its the same and it should work.

                                  A 1 Reply Last reply
                                  1
                                  • mrjjM mrjj

                                    @jsulm said in Error unknown typ name 'DS18B20':

                                    TEST c; // First instance

                                    This has to go in .h , in the MainWindow class and then

                                    TEST c; // Second instance, has to be removed then
                                    its the same and it should work.

                                    A Offline
                                    A Offline
                                    AlexKrammer
                                    wrote on last edited by
                                    #88

                                    @mrjj
                                    If i create in MainWindow.h a instance called TEST c;

                                    That instance won't work in class CheckTemperature. Will it?

                                    mrjjM 1 Reply Last reply
                                    0
                                    • A AlexKrammer

                                      @mrjj
                                      If i create in MainWindow.h a instance called TEST c;

                                      That instance won't work in class CheckTemperature. Will it?

                                      mrjjM Offline
                                      mrjjM Offline
                                      mrjj
                                      Lifetime Qt Champion
                                      wrote on last edited by
                                      #89

                                      @AlexKrammer
                                      No as its 2 different instances. one in MainWin and one in CheckTemperature.
                                      They are not the same.

                                      A 1 Reply Last reply
                                      0
                                      • mrjjM mrjj

                                        @AlexKrammer
                                        No as its 2 different instances. one in MainWin and one in CheckTemperature.
                                        They are not the same.

                                        A Offline
                                        A Offline
                                        AlexKrammer
                                        wrote on last edited by
                                        #90

                                        @mrjj
                                        And is there a posibility to use a variable of a class in 2 other classes

                                        mrjjM 1 Reply Last reply
                                        0
                                        • A AlexKrammer

                                          @mrjj
                                          And is there a posibility to use a variable of a class in 2 other classes

                                          mrjjM Offline
                                          mrjjM Offline
                                          mrjj
                                          Lifetime Qt Champion
                                          wrote on last edited by
                                          #91

                                          @AlexKrammer
                                          Yes if you use a pointer or reference then it will point back to the original variable.

                                          like

                                          int Num=0; the actual one

                                          class Test() {
                                          int &NumRef;
                                          void Test( int MyNum ) : NumRef(MyNum) {}
                                          }

                                          then when you create the instance

                                          Test MyTest(Num);

                                          Then it points to the actual one and will always have the same value.

                                          But often its not the best idea and can be solved other way like give it directly when you want to
                                          other classes to use the data.

                                          class Test() {
                                          int DoSomething(int NumTouse);
                                          }

                                          Test c;
                                          int result = c.DoSomething(Num);

                                          A 1 Reply Last reply
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