//X.h
//specification for type X

#include <iostream>
#include <string>
using namespace std;

//declare  class X
class X{
 public:
    //default constructor (requires no args)
    X(string nm = " "){name = nm; }
    //access fn.
    string get_name();

    //set fn.
    void set_name(string n);

    //I-O fns.
    void display(ostream& out = cout){ 
	//display data members representing an X
	out << name; 
    }

    void read(istream& in){
	//read data members representing an X
	in >> name;
    }

 private:
    string name;              //instance variable
};

//declare non-member functions that accept args of type X
ostream& operator<< (ostream& out, X& x);
istream& operator>> (istream& in, X& x);