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  1. #include <iostream>
  2. using namespace std;
  3. class A {
  4.  public:
  5.      A() : i(42) {}
  6.      friend ostream& operator<<(ostream &out, A const & c);
  7.  
  8.  protected:
  9.      int i;
  10.  
  11. };
  12.  
  13. ostream& operator<< (ostream &output, const A &dataToPrint)
  14. {
  15.         cout << dataToPrint.i << endl;
  16.         return output;
  17. }
  18.  
  19. int main()
  20. {
  21.     A a;
  22.     std::cout << a;
  23. }
  24.  
Success #stdin #stdout 0s 2724KB
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stdin
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Standard input is empty
stdout
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42
https://ideone.com/TTDhz
language:
C++ (gcc 8.3)
created:
13 years ago
visibility:
public

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