fork download
copy 
  1. #include <iostream>
  2.  
  3. using namespace std;
  4.  
  5. class A;
  6.  
  7. class Base {
  8.  public:
  9.   Base(A* a, int k);
  10.   void call();
  11.   void call2();
  12.  
  13.  private:
  14.   A* a;
  15.   int k;
  16. };
  17.  
  18. class A : public Base {
  19.   friend class Base;
  20.  public:
  21.   A() : Base(this, 5) {}
  22.  
  23.   Base lol(int k) { return Base(this, k); }
  24.  private:
  25.   void call(int k) { cout << "call(" << k << ");\n"; }
  26.   void call2(int k) { cout << "call2(" << k*2 << ");\n"; }
  27. };
  28.  
  29. Base::Base(A* a, int k) : a(a), k(k) {}
  30. void Base::call() {
  31.     a->call(k);
  32. }
  33. void Base::call2() {
  34.     a->call2(k);
  35. }
  36.  
  37. int main() {
  38.     A a;
  39.     Base x = a.lol(3);
  40.     a.Base::call();
  41.     x.Base::call2();
  42.     return 0;
  43. }
Success #stdin #stdout 0s 2896KB
comments (?)
stdin
copy 
Standard input is empty
stdout
copy 
call(5);
call2(6);
https://ideone.com/47344i
language:
C++14 (gcc 8.3)
created:
11 years ago
visibility:
public

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!