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  1. #include <iostream>
  2. #include <fstream>
  3. using namespace std;
  4.  
  5. class PhoneNumber
  6. {
  7. protected: 
  8.     int area;
  9.     long number;
  10. public: 
  11.      friend istream& operator>>(istream& is, PhoneNumber &p);
  12.      friend ostream& operator<<(ostream& os, PhoneNumber &p);
  13. };
  14.  
  15. istream& operator>>(istream& is, PhoneNumber &p) 
  16. {
  17. 	if (is==cin)
  18.         cout << "Enter area code : ";
  19.     is >> p.area;
  20. 	if (is==cin)
  21.         cout << "Enter number telephone number : ";
  22.     is >> p.number;
  23.     return is;
  24. };
  25.  
  26. ostream& operator<<(ostream& os, PhoneNumber &p) 
  27. {
  28.     return os << p.area<<"-"<<p.number;
  29. };
  30.  
  31.  
  32. class IntPhoneNumber:public PhoneNumber
  33. {
  34. protected:
  35.     int reg;
  36. public: 
  37.     friend istream& operator>>(istream& is, IntPhoneNumber &p);
  38.     friend ostream& operator<<(ostream& os, IntPhoneNumber &p);
  39. };
  40.  
  41. istream& operator>>(istream& is, IntPhoneNumber &p) 
  42. {
  43.  	if (is==cin)
  44.         cout << "Enter area code : ";
  45.     is >> p.reg;
  46.  	return is >> static_cast<PhoneNumber&>(p);
  47. };
  48. ostream& operator<<(ostream& os, IntPhoneNumber &p) 
  49. {
  50.     return os <<"("<<p.reg<<")"<< static_cast<PhoneNumber&>(p) ;
  51. };
  52.  
  53. int main() {
  54. 	// your code goes here
  55. 	PhoneNumber n,n2;
  56. 	cout<< "Request phone number"<<endl; 
  57. 	cin >> n;  
  58. 	cout <<n<<endl; 
  59.     ifstream ifs("test.txt");  // just to check that in this case there is no cout
  60. 	ifs >> n2;
  61.  
  62. 	cout<< "Request phone int number"<<endl; 
  63. 	IntPhoneNumber ni; 
  64. 	cin>>ni; 
  65. 	cout <<ni<<endl; 
  66.  
  67. 	return 0;
  68. }
Success #stdin #stdout 0s 3280KB
comments (?)
stdin 
1 2345
32 2 3456
stdout 
Request phone number
Enter area code : Enter number telephone number : 1-2345
Request phone int number
Enter area code : Enter area code : Enter number telephone number : (32)2-3456
https://ideone.com/CNSlfT
language:
C++14 (gcc 8.3)
created:
10 years ago
visibility:
public

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