fork download
copy 
  1. #include <iostream>
  2. #include <stdexcept>
  3.  
  4. struct A {
  5.     A() { f(); }
  6.     virtual void f() = 0;
  7. };
  8.  
  9. void A::f() {
  10.     std::cout << "A::f()" << std::endl;
  11. }
  12.  
  13. struct B : public A{
  14.     virtual void f() {
  15.         A::f(); // <----- call default implementation
  16.         std::cout << "B::f()" << std::endl;
  17.     }
  18. };
  19.  
  20. extern "C" void __cxa_pure_virtual() {
  21.     throw std::runtime_error("Oh shit. I just called a pure virtual function ;(");
  22. }
  23.  
  24. int main() {
  25.     try {
  26.         A *a = new B();
  27.         a->f();
  28.     } catch (std::exception &e) {
  29.         std::cout << "Exception caught: " << e.what() << std::endl;
  30.     }
  31.     return 0;
  32. }
Success #stdin #stdout 0s 3032KB
comments (?)
stdin
copy 
Standard input is empty
stdout
copy 
A::f()
A::f()
B::f()
https://ideone.com/JJlbot
language:
C++ (gcc 8.3)
created:
13 years ago
visibility:
secret

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!