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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. class Figure{
  5. 	protected:
  6. 		double s=0;
  7. 	public:
  8. 		Figure(){
  9. 	//		cout<<"Constructor Figure"<<endl;	
  10. 		}
  11. 		~Figure(){
  12. 	//		cout<<"Destrutor Figure"<<endl;
  13. 		}
  14. 		double getS(){
  15. 			return s;
  16. 		}
  17.  
  18. 		friend  std::ostream & operator<<(std::ostream &, const Figure);
  19. };
  20. std::ostream & operator<< (std::ostream & out, const Figure x) {
  21. 	out <<"S="<< x.s<<endl;
  22. 	out<<"Hello";
  23. 	return out;
  24. }
  25.  
  26. class Triangle:public Figure{
  27. public:
  28.   int  x, y, z;
  29.   Triangle(int a, int b, int c)
  30.   {
  31.   	cout<<"Constructor Tri"<<endl;
  32.     x = a;
  33.     y = b;
  34.     z = c;
  35.     s=a+b+c;
  36.   }
  37.   friend std::istream & operator>> (std::istream &, Triangle &);
  38.  
  39.   ~Triangle(){
  40. 	//		cout<<"Destrutor Triangle"<<endl;
  41. 		}
  42. };
  43.  
  44. class Rect: public Figure
  45. {
  46. public:
  47.   int x, y;
  48.   Rect(int a, int b)
  49.   {
  50.   	//cout<<"Constructor Rect"<<endl;
  51.     x = a;
  52.     y = b;
  53.     s=a*b;
  54.   }
  55.   ~Rect(){
  56. 		//	cout<<"Destrutor Rect"<<endl;
  57. 		}
  58.  
  59. };
  60. void ex(){
  61. 	Rect x(1,2); 
  62. }
  63. std::istream & operator>> (std::istream & in, Triangle & x) {
  64.  
  65. 	cout<<"Hello2222";
  66. 	int a,b,c;
  67. 	in >> a>> b>>c;
  68. 	x = Triangle(a,b,c);
  69. 	return in;
  70. }
  71. int main(void)
  72. {
  73. 	Figure f;
  74. 	cout<<f<<" dfsfghsyj";
  75. 	Rect y(10,5);
  76. 	cout<<y;
  77. 	ex();
  78. 	Triangle t(1,1,1);
  79. 	cin>>t;
  80. 	cout<<t;
  81. 	  return 0;
  82. }
  83.  
  84.  
Success #stdin #stdout 0s 5288KB
comments (?)
stdin
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3 3 3
stdout
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S=0
Hello dfsfghsyjS=50
HelloConstructor Tri
Hello2222Constructor Tri
S=9
Hello
https://ideone.com/PjVAjg
language:
C++14 (gcc 8.3)
created:
23 hours ago
visibility:
public

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