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  1. #include <iostream>
  2. #include <cstring>
  3. using namespace std;
  4.  
  5. class String
  6. {
  7. 	char *buffer;
  8. 	public:
  9. 	String() 
  10. 	{
  11. 		cout << "Constructor 1 "<<this<<endl;
  12. 		buffer = new char[1]; 
  13. 		buffer[0] = '\0';
  14. 	}
  15. 	String(const char *str) 
  16. 	{
  17. 		cout << "Constructor 2 "<<this<<endl;
  18. 		buffer = new char[strlen(str)+1]; 
  19. 		strcpy(buffer,str);
  20. 	}
  21. 	String(const String &s) 
  22. 	{
  23. 		cout << "Constructor copy "<<this<<" "<<&s<<endl;
  24. 		buffer = new char[strlen(s.buffer)+1]; 
  25. 		strcpy(buffer,s.buffer);
  26. 	}
  27. 	const char * get() const {return buffer;}
  28. 	~String() 
  29. 	{
  30. 		cout << "destructor "<<this<<endl;
  31. 		delete [] buffer; 
  32. 		buffer = NULL;
  33. 	} 
  34. 		String & operator = (const String &s) 
  35. 	{
  36. 		cout << "operator = "<<this<<" "<<&s<<endl;
  37. 		if (this == &s) return *this;
  38. 		delete [] buffer;
  39. 		buffer = new char[strlen(s.buffer)+1]; 
  40. 		strcpy(buffer,s.buffer);
  41. 		return *this;
  42. 	}
  43.  
  44. };
  45.  
  46. String func()
  47. {
  48. 	String s1 = "AAAAAAAAAAAAAAA";
  49. 	return s1;
  50. }
  51.  
  52. int main() 
  53. {
  54. 	String s1;
  55.  
  56. 	 s1 = func();
  57.  
  58.  
  59. 	cout<<s1.get()<<endl;
  60.  
  61. 	return 0;
  62. }
Success #stdin #stdout 0s 3416KB
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stdin
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Standard input is empty
stdout
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Constructor 1 0xbfeb6668
Constructor 2 0xbfeb666c
operator = 0xbfeb6668 0xbfeb666c
destructor 0xbfeb666c
AAAAAAAAAAAAAAA
destructor 0xbfeb6668
https://ideone.com/1CZ07G
language:
C++14 (gcc 8.3)
created:
8 years ago
visibility:
public

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