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  1. #include <iostream>
  2. #include <string>
  3. using namespace std;
  4.  
  5. class myClass
  6. {
  7. public:
  8.     myClass(int value);
  9.  
  10.     void methodA(const string &msg) { cout << msg << " from methodA" << endl; }
  11.     void methodB(const string &msg) { cout << msg << " from methodB" << endl; }
  12.     void method(const string &msg) { (this->*send_msg)(msg); }
  13.  
  14. //private:
  15.     void (myClass::*send_msg)(const string &msg);
  16. };
  17.  
  18. myClass::myClass(int value) : send_msg(value > 0 ? &myClass::methodA : &myClass::methodB)
  19. {
  20.  
  21. }
  22.  
  23. int main()
  24. {
  25.     myClass a(1);
  26.     a.method("Hi");
  27.  
  28.     myClass b(0);
  29.     b.method("Hi");
  30.  
  31.     //or
  32.  
  33.     myClass c(1);
  34.     (c.*c.send_msg)("Hi");
  35.  
  36.     myClass * p = new myClass(0);
  37.     (p->*p->send_msg)("Hi");
  38.     delete p;
  39.  
  40. 	return 0;
  41. }
Success #stdin #stdout 0s 3460KB
comments (?)
stdin
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Standard input is empty
stdout
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Hi from methodA
Hi from methodB
Hi from methodA
Hi from methodB
https://ideone.com/Vx4x88
language:
C++14 (gcc 8.3)
created:
9 years ago
visibility:
public

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