Always private
DuckDuckGo never tracks your searches.
Learn More
You can hide this reminder in Search Settings
All regions
Argentina
Australia
Austria
Belgium (fr)
Belgium (nl)
Brazil
Bulgaria
Canada (en)
Canada (fr)
Catalonia
Chile
China
Colombia
Croatia
Czech Republic
Denmark
Estonia
Finland
France
Germany
Greece
Hong Kong
Hungary
Iceland
India (en)
Indonesia (en)
Ireland
Israel (en)
Italy
Japan
Korea
Latvia
Lithuania
Malaysia (en)
Mexico
Netherlands
New Zealand
Norway
Pakistan (en)
Peru
Philippines (en)
Poland
Portugal
Romania
Russia
Saudi Arabia
Singapore
Slovakia
Slovenia
South Africa
Spain (ca)
Spain (es)
Sweden
Switzerland (de)
Switzerland (fr)
Taiwan
Thailand (en)
Turkey
Ukraine
United Kingdom
US (English)
US (Spanish)
Vietnam (en)
Safe search: moderate
Strict
Moderate
Off
Any time
Any time
Past day
Past week
Past month
Past year
  1. stackoverflow.com

    The Derived class destructor reset the vptr points to the Base class vtable, which has the pure virtual function, so when we call the virtual function, it actually calls into the pure virutal ones. This could happen because of an obvious code bug, or a complicated scenario of race condition in multi-threading environments.
  2. learn.microsoft.com

    Learn how to fix this error caused by calling a virtual function in an abstract base class through a pointer to the base class. See the common reasons, steps to repair or reinstall the program, and information for programmers.
  3. forums.nexusmods.com

    Mar 25, 2024So I've been playing New Vegas for over 80 hours now after following Viva New Vegas and it's been working great, not a single CTD until I started Dead Money. Now every second door I go through, my game crashes. No new mods, nothing, it just started happening. I've already installed every C++ libr...
  4. steamcommunity.com

    [Fix for real] Pure virtual function being called while application was running (Windows 8/10 problem) I tried everything said in every message about this error, but ppl were saying I changed graphics and tried to reinstall dotNet framework, updated drivers (which already were) and whatsoever, and thats not the problem. Doing that only made in ...
  5. answers.microsoft.com

    Hello everyone, Usually I can troubleshoot problems myself, but since I am here this means this problem has me completely stumped. EVERY SINGLE web browser that I have tried produces the following
  6. stackoverflow.com

    Here are a few cases in which a pure virtual call can happen. Using a dangling pointer - the pointer isn't of a valid object so the virtual table it points to is just random memory which may contain NULL; Bad cast using a static_cast to the wrong type (or C-style cast) can also cause the object you point to to not have the correct methods in its virtual table (in this case at least it really ...
  7. geeksforgeeks.org

    Jan 16, 2025When you refer to a derived class object using a pointer or a reference to the base class, you can call a virtual function for that object and execute the derived class's version of the function. Pure Virtual Functions in C++. A pure virtual function (or abstract function) in C++ is a virtual function for which we don't have an ...
  8. Can’t find what you’re looking for?

    Help us improve DuckDuckGo searches with your feedback

  1. They can result if you try to make a virtual function call from a constructor or destructor. Since you can't make a virtual function call from a constructor or destructor (the derived class object hasn't been constructed or has already been destroyed), it calls the base class version, which in the case of a pure virtual function, doesn't exist.

    class Base
    {
    public:
        Base() { reallyDoIt(); }
        void reallyDoIt() { doIt(); } // DON'T DO THIS
        virtual void doIt() = 0;
    };
    
    class Derived : public Base
    {
        void doIt() {}
    };
    
    int main(void)
    {
        Derived d;  // This will cause "pure virtual function call" error
    }

    See also Raymond Chen's 2 articles on the subject

    --Adam Rosenfield

    Was this helpful?
Custom date rangeX