C++Talk.NET C++ language newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  Class problem          C++Talk.NET Forum Index -> C++ language (comp.lang.c++) View previous topic :: View next topic   Author Message Tommy Lang Guest Posted: Mon Sep 29, 2003 10:15 pm    Post subject: Class problem I have created my own class called MyClass. I then have created three instances/variables of the class in main... int main(){ MyClass One; MyClass Two; MyClass Three; //In the constructor of the class I have given all the above variables a value. //I want to call a function that calculates and return the sum, like this: Three = One.Add(Two); //function Add returns a double ....... But I end up getting an error saying that...... Add' : cannot convert parameter 1 from 'class MyClass' to 'double' How do I avoid this error?? Does anyone know what I am doing wrong? Tips?? Thanks, T Back to top jeffc Guest Posted: Mon Sep 29, 2003 10:53 pm    Post subject: Re: Class problem "Tommy Lang" <mums_se (AT) yahoo (DOT) se> wrote Quote: I have created my own class called MyClass. I then have created three instances/variables of the class in main... int main(){ MyClass One; MyClass Two; MyClass Three; //In the constructor of the class I have given all the above variables a value. There isn't a way to give *those* variables a "value" in the constructor. Quote: //I want to call a function that calculates and return the sum, like this: Three = One.Add(Two); //function Add returns a double But I end up getting an error saying that...... Add' : cannot convert parameter 1 from 'class MyClass' to 'double' You're going to have to show the entire class, including the constructor and Add functions. I suspect you're confusing the actual class with a variable contained insided the class. Back to top Default User Guest Posted: Mon Sep 29, 2003 11:06 pm    Post subject: Re: Class problem Tommy Lang wrote: Quote: I have created my own class called MyClass. I then have created three instances/variables of the class in main... int main(){ MyClass One; MyClass Two; MyClass Three; //In the constructor of the class I have given all the above variables a value. //I want to call a function that calculates and return the sum, like this: Three = One.Add(Two); //function Add returns a double ...... But I end up getting an error saying that...... Add' : cannot convert parameter 1 from 'class MyClass' to 'double' In the future, show us complete, minimal code. But the problem is obvious, the variable Three is not of type double, it is of MyClass. Just exactly what your compiler told you. To fix it, you either need an overloaded = operator (way overkill) or just assign the result to the class member. You didn't show us the class definition, so we can't tell what that is. Your C++ book should explain this. Brian Rodenborn Back to top Display posts from previous: All Posts1 Day7 Days2 Weeks1 Month3 Months6 Months1 Year Oldest FirstNewest First         C++Talk.NET Forum Index -> C++ language (comp.lang.c++) All times are GMT Page 1 of 1   Jump to: Select a forum C/C++----------------C LanguageC Language (Moderated)C++ Language (Moderated)C++ language (comp.lang.c++)C++ language, library and standards Non-English C/C++ Newsgroups----------------C++ (German)C++ (French)  You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum Powered by phpBB © 2001, 2006 phpBB Group SEO toolkit © 2004-2006 webmedic.