fork download
copy 
  1. #include <iostream>
  2. using namespace std;
  3.  
  4. template <typename T>
  5. const T* make_const(T *ptr) {
  6.     return ptr;
  7. }
  8.  
  9. #define const_this make_const(this)
  10.  
  11. struct MyQuestion
  12. {
  13. 	void fun()
  14. 	{ cout<<"a"; }
  15.  
  16. 	void fun()const
  17. 	{ cout<<"b"; }
  18.  
  19. 	void call()
  20. 	{
  21. 	    const_this->fun();   // calls fun() const
  22.  
  23. 	    fun();               // calls fun()
  24. 	}
  25. };
  26.  
  27. int main() {
  28. 	MyQuestion q;
  29. 	q.call();
  30. }
Success #stdin #stdout 0s 3340KB
comments (?)
stdin
copy 
Standard input is empty
stdout
copy 
ba
https://ideone.com/TQ3KIb
language:
C++14 (gcc 8.3)
created:
9 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!