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Re: derived class 19 Years Ago by Ancient Dragon …of the base class not accessible to members of derived class by making base class members private. In the code below, class derived cannot access variable… x in class base. [code] class base { ... private: int x; } class derived… derived class 19 Years Ago by nemo a derived class inherits [B]all members [/B] of the base class, that is what the book says, right? i want to make a derived class that has only some of the members of the base class, and some of its own members and functions, is it ok to do it like this? or shall i get error msgs. i dont like error msgs at all ! nemo Derived class 12 Years Ago by #include <lou> … am trying to access private level members with a Derived class but keep getting: Error1 cannot access private member declared in…;); }; . . . ...and here is my code for the Derived header file: . . . class extTimeType:public TimeType { private: string timezone; public: extTimeType(); void… Derived class 15 Years Ago by tazboy …; public: person(); // getters and setters };[/CODE] and a student class: [CODE=C++]class student: public person { private: string major, grade; public: student… online but I never get to see a fully used derived class to see what everything looks like, including the declaration. Any… Re: Derived class 15 Years Ago by Stefano Mtangoo …net/cpp_tutorial_inheritance.html[/url] [CODE=C++] class vehicle //Sample base class for c++ inheritance tutorial { protected: …void start(); void stop(); void run(); }; class Car: public vehicle //Sample derived class for C++ inheritance tutorial { protected: char type_of_fuel… Re: Derived class 15 Years Ago by mrnutty … it will be used in the derived class. 2) Implement student class but in the constructor you need …to pass it the information needed to person class. [code] class person { private : string name; public : person…[/code] If you do not explicitly provide the programmer class with a person constructor, the compiler will use the default… Derived class "improving" base class 11 Years Ago by Seba Sama …things about derived classes: how to add something "extra" to existing functions in base class. My base class is "…, show results. No problem here. Then I create a derived class named "shape3D". Please note the private stuff in…I want to add another dimension (height) to the derived class and add one more `cin` for it in the … Re: Derived class "improving" base class 11 Years Ago by Seba Sama Oops.. I forgot to ask about "improving" base class' functions. What would be the best way to add something? …, I want to add the third dimension height in the derived class shape3D. Is it possible to do it or should I… use virtual function in the base class and set everything up in the derived class? I think of creating a 3rd level… Class and Derived Class 15 Years Ago by BobbieJean …. Here's my code: [CODE]//This program demostrates a class and a derived class with constructors. #include <iostream> #include <string…> #include <iomanip> using namespace std; class Employee { private… Re: Derived class "improving" base class 11 Years Ago by Seba Sama … the line `shape2D::set_dimensions();` is calling the base class' `set_dimensions();` function, which is **public**. And …is public, inside the class. It is not directly accessed by the derived class, but calling the public … get functions? Is it something like the following? class a { public: a(); virtual ~a(); void … Re: Derived class "improving" base class 11 Years Ago by Ancient Dragon … the other case. **private:** means the derived class cannot access the variable -- if the defived class doesn't attempt to access the private…. * Change the variables from **private** to **protected** * In the base class add get and set functions Re: Overloading base function in a derived class fails 14 Years Ago by Agni Derived class functions which have the same name as the base class functions hide the base class functions rather than overloading them. To allow overloading use the 'using' directive. Re: Derived class 12 Years Ago by JasonHippy In short, the private members of your base class should be declared as protected rather than private if you want derived objects to be able to access them directly. Re: Derived class 15 Years Ago by daviddoria …: string fname, lname, gender bdate; public: person(); // getters and setters }; class student: public person { private: std::string major, grade; //note the…() here because you have already declared that student is derived from person here: //class student: public person { [/code] The main problem is… Re: Derived class can't see derived functions? 14 Years Ago by daviddoria …Parent::Add;[/icode] in the derived class: (I show two derived classes to demonstrate why you would… actually want to do this in the first place) [code] #include <iostream> class… { return this->Add(a,a); } }; class Child1 : public Parent { public: using Parent::Add;… How can I access a BASE class this pointer or object from within a DERIVED class? 16 Years Ago by nosnibor … pointer or object from with in a derived class? Example: [CODE=cplusplus] class BASE { public: BASE () {} BASE(BASE & b){} virtual ~BASE () {} virtual…; BASE * base = NULL; base = new DERIVED(deriveObj); base ->Method(); }[/CODE] so within tha derived class i would have a function like trysomething… Copy constructor in derived class 20 Years Ago by elspork … I correctly call copy constructors for a derived class so that it correctly copies data from the … = theObject.GetData1() ; } class Derived : public Base { Derived(); Derived(const Derived &theObject); int derivedData; int GetData2() const {return baseData;} } Derived:: Derived( const Derived &theObject) { Base(… Passing a derived class object as a constructor argument 15 Years Ago by maddav … of the main requirements is to pass a 2D shape derived class object (e.g. "circle ci1") as an …argument in a generic derived class known as "prism" that will take the area… circle->cylinder). My question is how to pass the derived class object in the prism constructor? I figured i could use… Re: 3 C++ questions - destructors, derived class, abstract class 16 Years Ago by MrSpigot …a base class, be inherited by a derived class? 1.2 Can a base class destructor be overridden in a derived class? 1….3 Does an abstract class … a destructor, defined in a base class, be inherited by a derived class?[/B] Destructors and constructors don't… Re: How can I access a BASE class this pointer or object from within a DERIVED class? 16 Years Ago by nosnibor Yes I know that. That is how you access the methods. But what if the method takes that base class as a parameter and you want to call that method from the derived class? Overloading base function in a derived class fails 14 Years Ago by danizobin … happy for explanation for the next phenomenon: [CODE] class Base { protected: void add(void *); }; class Derived : public Base { public: void add(int); } void…"]Base::[/COLOR]add(new int(num)); } [/CODE] Question: The derived class should have inherited the void add(void*) method from base… Re: Overloading base function in a derived class fails 14 Years Ago by arkoenig …accepted an int argument. So whenever you derived a function from a class that someone else had written, you would… what C++ actually does is to say that a derived class is a new scope. Except for virtual functions, very… name defined in a derived class hides the corresponding name from any base classes. Although … Writing base class settings in a base class, called from a derived class. 12 Years Ago by DaveTran … setup it is easy to save the state of the derived class by saving its settings using the following method public override… settings must be explicitely set in the derived class and not just the local or derived class settings. What I would like to do… Can someone double check my logic in a base and derived class program? 10 Years Ago by karodhill …formula sales*0.05 b) create a derived class named Premiumbonus the derived clas getbonus mothod calculate the bonus as …returns sales Return _Sales * 0.05 End Function End Class ' derived class Public Class PremiumBonus Inherits Bonus Public Sub New() MyBase.New() … Help with creating a derived class 16 Years Ago by edouard89 …I have to make the following derived class [quote] Your LField class is derived from your Field class and represents a line field. Upon… the string currently stored by the field. In classes derived from LField, this address may be the address of… to make a copy of an instance of a class derived from LField without limiting the copy to being a… Accessing overridden methods of derived class 14 Years Ago by gilly231 … when array[x] is a 2nd derived class i.e. base--->1stderived class--->2nd derived class it will only access the print() of… the 1st derived class. i.e. the 2ndDerivedClass::print… Force derived class implementation without virtual keyword 15 Years Ago by dusktreader I have a class hierarchy in which the base class is abstract. Each derived class has a set of private members…a setParams() function across all derived classes. However, because the parameters for each derived class are unique in number and… type to that class, it doesn't seem … My Small Program works fine with Base class, but very werid with derived class... 14 Years Ago by WhiZTiM …decided to extend it by making a derived class of the base class 'Time' which will hold first,…quot;[/I] The second is purely using the derived class 'Timer'...[I]#include "timer.h"… total lines is about 860[/I] [CODE]/////////////Time class///////////////////////////////////// class Time{ private: int yr; int mnth; int … friend with derived class 17 Years Ago by alexhkleung …[COLOR="Green"][B] MainControl[/B][/COLOR] with the derived class [COLOR="Green"][B]food [/B][/COLOR] [B… #include "maincontrol.h" class objects {...}; [/CODE] [B] [COLOR="Green"]food.h (derived)[/COLOR][/B] [CODE=c++] #include…] is the error caused by friending MainControl with a derived class? Re: Overloading base function in a derived class fails 14 Years Ago by danizobin [QUOTE=Agni;1248369]Derived class functions which have the same name as the base class functions hide the base class functions rather than overloading them…