472,794 Members | 1,739 Online
Bytes | Software Development & Data Engineering Community
Post Job

Home Posts Topics Members FAQ

Join Bytes to post your question to a community of 472,794 software developers and data experts.

Which (virtual) function from which class is called?

Assume I have the following code structure:

class A .... {
f() { ..... }
virtual vf() { ..... } }
class B .... {
f() { ..... }
virtual vf() { ..... } }

main () {

A a;
B b;

A *pa = new B();
B *pb = new A();



Which function is called in the four cases above ?

Are all calls possible or are they (at least some of them) already rejected during compilation?


Dec 21 '07 #1
0 836

This thread has been closed and replies have been disabled. Please start a new discussion.

Similar topics

by: Ryan Faulkner | last post by:
Hi, Im having a few problems with virtual functions (Im using the Visual C++ environment by the way). I have a base class with three virtual functions and a derived class with a single new...
by: Brad Marts | last post by:
I would like to have a function that takes as an argument a base class but performs differently depending on which type of derived class is passed. Can I tell which derived class is passed? For...
by: sam++ | last post by:
Hi, I created a pure virtual class P and its derived sub-class D. In class P, declared a pure virtural function pure(); in sub-class D define its implementation. eg. class P {
by: Zheng Da | last post by:
I don't know where should I ask the question, so send the email to this group. I choose this group, because I want to write the program with c++ :) I want to write a program which support...
by: RainBow | last post by:
Greetings!! I introduced the so-called "thin-template" pattern for controlling the code bloat caused due to template usage. However, one of the functions in the template happens to be virtual...
by: PengYu.UT | last post by:
Hi, A pure function is called in the base function constructor. It generate a run time error: "pure virtual method called". My problem is that class A have some derived classes. I want A's...
by: dc | last post by:
Can anybody think of a situation where virtual function's address resolution/ something related to virtual is done at compile time
by: ypjofficial | last post by:
Hello All, So far I have been reading that in case of a polymorphic class ( having at least one virtual function in it), the virtual function call get resolved at run time and during that the...
by: John Goche | last post by:
Hello, page 202 of Symbian OS Explained by Jo Stichbury states "All virtual functions, public, protected or private, should be exported" then page 203 states "In the rare cases where a...
by: Markus Svilans | last post by:
Hello, My question involves virtual functions and inheritance. Suppose we have a class structure, that consists of "data" classes, and "processor" classes. The data classes are derived from...
by: isladogs | last post by:
The next Access Europe meeting will be on Wednesday 2 August 2023 starting at 18:00 UK time (6PM UTC+1) and finishing at about 19:15 (7.15PM) The start time is equivalent to 19:00 (7PM) in Central...
by: erikbower65 | last post by:
Using CodiumAI's pr-agent is simple and powerful. Follow these steps: 1. Install CodiumAI CLI: Ensure Node.js is installed, then run 'npm install -g codiumai' in the terminal. 2. Connect to...
by: erikbower65 | last post by:
Here's a concise step-by-step guide for manually installing IntelliJ IDEA: 1. Download: Visit the official JetBrains website and download the IntelliJ IDEA Community or Ultimate edition based on...
by: kcodez | last post by:
As a H5 game development enthusiast, I recently wrote a very interesting little game - Toy Claw ((http://claw.kjeek.com/))。Here I will summarize and share the development experience here, and hope it...
by: Rina0 | last post by:
I am looking for a Python code to find the longest common subsequence of two strings. I found this blog post that describes the length of longest common subsequence problem and provides a solution in...
by: lllomh | last post by:
Define the method first this.state = { buttonBackgroundColor: 'green', isBlinking: false, // A new status is added to identify whether the button is blinking or not } autoStart=()=>{
by: lllomh | last post by:
How does React native implement an English player?
by: Mushico | last post by:
How to calculate date of retirement from date of birth
by: DJRhino | last post by:
Was curious if anyone else was having this same issue or not.... I was just Up/Down graded to windows 11 and now my access combo boxes are not acting right. With win 10 I could start typing...

By using Bytes.com and it's services, you agree to our Privacy Policy and Terms of Use.

To disable or enable advertisements and analytics tracking please visit the manage ads & tracking page.