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  1. #include <iostream>
  2. #include <sstream>
  3. #include <string>
  4.  
  5. class Foo {
  6. public:
  7.     Foo() { format_string(); }
  8.     Foo(int a) { format_string(a); }
  9.  
  10.     void print() { std::cout << str; }
  11.  
  12. protected:
  13. 	std::string str;
  14.  
  15. 	void format_string(int a = 0)
  16. 	{
  17. 		std::stringstream stream;
  18. 		stream << "{a: " << a << "}\n";
  19. 		str = stream.str();
  20. 	}
  21. };
  22.  
  23. class Bar : public Foo {
  24. public:
  25.     Bar() { format_string(); }
  26.     Bar(int a, int b) { format_string(a, b); }
  27.  
  28. protected:
  29. 	void format_string(int a = 0, int b = 0)
  30. 	{
  31. 		std::stringstream stream;
  32. 		stream << "{a: " << a << ", b: " << b << "}\n";
  33. 		str = stream.str();
  34. 	}
  35. };
  36.  
  37. int main() {
  38.     Foo t1 = Bar(10,10);
  39.     Bar t2 = Bar(20,20);
  40.     Foo *t3 = new Bar(30,30);
  41.     Foo t4 = Bar(10, 20);
  42.     t1.print();
  43.     t2.print();
  44.     t3->print();
  45.     t4.print();
  46.     delete t3;
  47.     return 0;
  48. }
Success #stdin #stdout 0s 3476KB
comments (?)
stdin
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Standard input is empty
stdout
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{a: 10, b: 10}
{a: 20, b: 20}
{a: 30, b: 30}
{a: 10, b: 20}
https://ideone.com/qnfVig
language:
C++14 (gcc 8.3)
created:
11 years ago
visibility:
public

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