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  1. #include <iostream>
  2. #include <sstream>
  3. #include <algorithm>
  4. #include <iterator>
  5. #include <vector>
  6.  
  7. class MyClass {
  8. public:
  9.     int specific_detail;
  10. };
  11.  
  12. class MyClassDetail {
  13.     const MyClass &m_cls;
  14. public:
  15.     MyClassDetail(const MyClass &src) : m_cls(src) {}
  16.     friend std::ostream& operator<<(std::ostream &out, const MyClassDetail &in) {
  17.         return out << in.m_cls.specific_detail;
  18.     }
  19. };
  20.  
  21. int main() {
  22.     std::vector<MyClass> vec;
  23.     for(int i = 1; i <= 5; ++i) {
  24.         MyClass cls;
  25.         cls.specific_detail = i;
  26.         vec.push_back(cls);
  27.     }
  28. 	std::ostringstream ss;
  29.     std::copy(vec.begin(), vec.end()-1, std::ostream_iterator<MyClassDetail>(ss, ", "));
  30.     ss << MyClassDetail(vec.back());
  31.     std::cout << ss.str();
  32. 	return 0;
  33. }
Success #stdin #stdout 0s 16064KB
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https://ideone.com/qFyWoy
language:
C++ (gcc 8.3)
created:
6 years ago
visibility:
public

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