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  1. #include <iostream>
  2. #include <cstring>
  3. using namespace std;
  4.  
  5. class Person {
  6. 	char* name;
  7. 	friend class Couple;
  8. 	void setName( const char * newName ) {
  9. 		if( name != nullptr )
  10. 			delete( name );
  11.  
  12. 		int nameLen = strlen( newName );
  13. 		name = new char[nameLen + 1];		
  14. 		strcpy( name, newName );
  15. 		name[nameLen] = '\0';
  16. 	}
  17. public:
  18. 	friend ostream& operator<<( ostream& str, const Person& os );
  19. 	explicit Person( const char* n );
  20. 	Person( const Person& os );
  21. 	Person& operator=( const Person& os );
  22. 	~Person();
  23. };
  24. // implementacja zadeklarowanych funkcji
  25. ostream& operator<<( ostream& str, const Person& os ) {
  26. 	str << os.name;
  27. 	return str;
  28. }
  29.  
  30. Person::Person( const char* n ) : name( nullptr ) {
  31. 	setName( n );
  32. }
  33. Person::Person( const Person& os ) : Person(os.name) {}
  34. Person& Person::operator=( const Person& os ) { setName( os.name ); return *this; }
  35.  
  36. Person::~Person() { 
  37. 	cout << "DEL " << *this << endl; 
  38. 	if( name != nullptr ) delete( name ); 
  39. };
  40.  
  41. class Couple {
  42. 	Person *wife, *husband;
  43. public:
  44. 	friend ostream& operator<<( ostream& str, const Couple& p );
  45. 	Couple( const Person& she, const Person& he );
  46. 	Couple( const Couple& other );
  47. 	Couple& operator=( const Couple& other );
  48. 	~Couple();
  49. };
  50. // implementacja zadeklarowanych funkcji
  51. ostream& operator<<( ostream& str, const Couple& c ) {
  52. 	str << "Couple: he " << *(c.husband) << ", she " << *(c.wife) << endl;
  53. 	return str;
  54. }
  55.  
  56. Couple::Couple( const Person& she, const Person& he ) { wife = new Person( she ); husband = new Person( he ); }
  57. Couple::Couple( const Couple& other ) : Couple( *( other.wife ), *( other.husband) ) {}
  58. Couple& Couple::operator=( const Couple& other ) { 
  59. 	if( wife != nullptr )
  60. 		delete wife;
  61.  
  62. 	wife = new Person( *( other.wife ) );
  63.  
  64. 	if( husband != nullptr )
  65. 		delete husband;
  66.  
  67. 	husband = new Person( *( other.husband ) );
  68.  
  69. 	return *this;
  70. }
  71.  
  72. Couple::~Couple() {
  73. 	//cout << "DEL " << *this << endl;
  74. 	if( wife != nullptr )
  75. 		delete wife;
  76.  
  77. 	if( husband != nullptr )
  78. 		delete husband;
  79. }
  80.  
  81.  
  82. int main( void ) {
  83. 	Person	*pjohn = new Person( "John" ),
  84. 			*pjane = new Person( "Jane" );
  85.  
  86. 	Person	mary( "Mary" ), 
  87. 			mark( "Mark" );
  88.  
  89. 	Couple *pcouple1 = new Couple( mary, *pjohn );
  90.  
  91. 	Couple couple2( *pjane, mark );
  92.  
  93. 	delete pjohn; // DEL John
  94. 	delete pjane; // DEL Jane
  95.  
  96. 	cout << *pcouple1 << endl; // Couple : he John, she Mary
  97. 	cout << couple2 << endl; // Couple : he Mark, she Jane
  98. 	couple2 = *pcouple1;
  99. 	/*
  100. 	DEL Jane
  101. 	DEL Mark
  102. 	*/
  103.  
  104. 	delete pcouple1;
  105.  
  106. 	/*
  107. 	DEL Mary
  108. 	DEL John
  109. 	*/
  110.  
  111. 	cout << couple2; // Couple : he John, she Mary
  112.  
  113. 	return 0;
  114. 	/*
  115. 	DEL Mary
  116. 	DEL John
  117. 	DEL Mark
  118. 	DEL Mary
  119. 	*/
  120. }
Success #stdin #stdout 0s 5628KB
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stdin
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Standard input is empty
stdout
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DEL John
DEL Jane
Couple: he John, she Mary

Couple: he Mark, she Jane

DEL Jane
DEL Mark
DEL Mary
DEL John
Couple: he John, she Mary
DEL Mary
DEL John
DEL Mark
DEL Mary
https://ideone.com/BYYBe1
language:
C++14 (gcc 8.3)
created:
2 years ago
visibility:
public

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