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Apr 27th, 2017
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  1.  
  2. #define _CRT_SECURE_NO_WARNINGS
  3.  
  4. #include <iostream>
  5.  
  6.  
  7. class MyString
  8. {
  9. char* m_pStr;
  10.  
  11. public:
  12. MyString();
  13. MyString(char* string);
  14. ~MyString();
  15.  
  16. friend std::ostream& operator<<(std::ostream& os, const MyString& string);
  17.  
  18. };
  19.  
  20.  
  21. std::ostream& operator<<(std::ostream& os, const MyString& string)
  22. {
  23. os << string.m_pStr;
  24. return os;
  25. }
  26.  
  27. MyString::MyString()
  28. {
  29. std::cout << "nullptr created" << std::endl;
  30. char * m_pStr = nullptr;
  31. }
  32.  
  33. MyString::MyString(char * string)
  34. {
  35. m_pStr = new char[strlen(string) + 1];
  36.  
  37. strcpy(m_pStr, string);
  38. }
  39.  
  40. MyString::~MyString()
  41. {
  42. std::cout << "detructor " << std::endl;
  43. delete[]m_pStr;
  44. }
  45.  
  46. int main()
  47. {
  48.  
  49. MyString test1 = MyString("hello comrade, it`s testing");
  50.  
  51. std::cout << test1 << std::endl;
  52.  
  53. system("pause");
  54. return 0;
  55. }
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