friend ostream operator for private fields : overload ostream istream operator « Operator Overloading « C++ Tutorial

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C++ Tutorial » Operator Overloading » overload ostream istream operator

10.15.6.friend ostream operator for private fields

#include <iostream>

#include <cstring>

using namespace std;



class MyClass {

  // now private

  char name[80];

  int areacode;

  int prefix;

  int num;

public:

  MyClass(char *n, int a, int p, int nm)

  {

    strcpy(name, n);

    areacode = a;

    prefix = p;

    num = nm;

  }

  friend ostream &operator<<(ostream &stream, MyClass o);

};



ostream &operator<<(ostream &stream, MyClass o)

{

  stream << o.name << " ";

  stream << "(" << o.areacode << ") ";

  stream << o.prefix << "-" << o.num << "\n";



  return stream;

}



int main() {

  MyClass a("T", 1, 5, 1);

  MyClass b("A", 3, 5, 5);

  MyClass c("T", 2, 5, 9);



  cout << a << b << c;



  return 0;

}

T (1) 5-1
A (3) 5-5
T (2) 5-9

10.15.overload ostream istream operator
	10.15.1.	Class level ostream operator and istream operator
	10.15.2.	istream operator with data check
	10.15.3.	Class ostream operator
	10.15.4.	ostream and istream operator for a class
	10.15.5.	Complex logic in ostream operator
	10.15.6.	friend ostream operator for private fields
	10.15.7.	Overload ostream and istream operator
	10.15.8.	Ignore: manipulator that ignores N lines
	10.15.9.	Overloading >>: To demonstrate a custom inserter, one will be created for objects of type phonebook, shown here.
	10.15.10.	Overload << (inserter)

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