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POBase class with 2 derived classes - How to construct correctly?
 

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  1. POBase class with 2 derived classes - How to construct correctly?
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    <p>I have 3 classes. Let's call them Class A, class B and class C.</p> <p>Class C inherits from Class B and class B inherits from class A. (There are other classes as well which inherit from class B)</p> <pre><code>EG classC -&gt; classB -&gt; classA classD -&gt; classB -&gt; classA classE -&gt; classB -&gt; classA </code></pre> <p>I want to create a class C object. </p> <p>Class A has a variable 'name' Class B has a variable 'choice'</p> <p>I want the constructor of class C objects to create the objects with a given name.</p> <p>This is how I've done my .h files (which obviously doesn't work) These extracts are from the relevant .h files. I have a .h file and a .cpp file for each class.</p> <pre><code>class classC: public classB { public: classC(string name):classA(name){} }; class classB : public classA { public: classB(string name); void setChoice(); string getChoice(); protected: string choice; }; class classA { public: classA(); classA(string name); string getName(); virtual void setChoice(); protected: string name; }; </code></pre> <p>The extracts from the .cpp files are as follows:</p> <p><em><strong></em> ClassC **</strong></p> <pre><code>classC::classC(string name) {} void classC::setChoice() { choice = "P"; } </code></pre> <p><em><strong></em> ClassB **</strong></p> <pre><code>classB::classB(string name):classA(name){} string classB::getChoice(){ return choice; } void classB::setchoice(string newChoice){ choice = newChoice; } </code></pre> <p><strong>* ClassA*</strong></p> <pre><code>classA::classA() {} classA::classA(string aName):name(aName){} string classA::getName() { return name; } void classA::setSelection() {} </code></pre> <p>Driver:</p> <pre><code>classC* classC1 = new classC("tomato"); class1C-&gt;setChoice(); cout &lt;&lt; "Name is " &lt;&lt; classC1-&gt;getName() &lt;&lt; endl; cout &lt;&lt; "Choice is " &lt;&lt; classC1-&gt;getChoice() &lt;&lt; endl; </code></pre> <p>I have a setChoice method set up as virtual as I want each class from Class C - Class Z to have their own specific setChoice function. The specifications of this project also state that this function must be declared in ClassA.</p> <p>I'm getting an error stating that ClassB expects 1 argument, and none is provided.</p> <p>Can somebody please point me int he right direction. I'm out of ideas.</p>
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    1. COPlease post the code as you have it, in the order you have it. `Class` is not a keyword in C++, and the order of your declarations doesn't work. Why are you calling `classA`'s constructor in `classC`?
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    2. COI've edited the post...
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    3. COYour code is still inconsistent. `class`/`Class`, `ClassC`/`classC`.
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