• biggcarpenter (132/132) Feb 01 2010 Hi there, I've been working on this base class and 2 derived classes so ...

biggcarpenter <l1lamont yahoo.com> writes:

Hi there, I've been working on this base class and 2 derived classes so far
everything works except for when I try

to get a display that looks like this [CODE]

      Customer: Security




      Customer: Security



___________________________________

      Customer: Library




      Customer: Library




[/CODE]

 Can anyone point me in the right direction or offer resources that explain
this aspect of printing derived class

object contents? Here is my code, the program compiles nicely - i am looking
for print methods to make the output

print the format shown above - i am looking for a function or method of
calling the existing code objects to make

them display like the above example. Thanks from ~L

[CODE]// W I P_2                   //Tnum.h interface

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

class Tnum {

public:
	string NPA, NXX, LINE, P_NUM;

	Tnum( ) {cout <<"\n Tnum default constructor proof\n";}

	Tnum( string a,string b,string c );

	void ph_num( );

   ~Tnum( );

	string GetNPA( ) const { return NPA; }
	void SetNPA( string g ) { NPA = g; }

	string GetNXX( ) const { return NXX; }
	void SetNXX( string h ) { NXX = h; }

	string GetLINE( ) const { return LINE; }
	void SetLINE( string i ) { LINE = i; }
};

Tnum::Tnum( string a,string b,string c ) {

	NPA  = a;
	NXX  = b;
	LINE = c;
	P_NUM = NPA + NXX + LINE;  }

void Tnum::ph_num( ) {

	cout <<" \n Tnum parameterized constructor proof\n\n Type 3 digit area code
then press 'ENTER' key  ";
	cin >> NPA;

	cout <<" \n Type 3 digit prefix then press 'ENTER' key  ";
	cin >> NXX;

	cout <<" \n Type 4 digit line number then press 'ENTER' key  ";
	cin >> LINE;



Tnum::~Tnum( ) {

	cout <<" \n Tnum destructor fx flushed object containing variable value "<<
P_NUM

<<"\n\n_________________________________________________________________________"<<endl;}

//________________________________________________

                               //WorTN.h interface

class WorTN : public Tnum {

public:
   string CustName;

   WorTN( ) {cout <<"\n WorTN default constructor proof\n";}

   WorTN( string d );

   void cust_num( );

   ~WorTN( );

   string GetCustName( ) const { return CustName; }
   void SetCustName( string j ) { CustName = j; }
};

WorTN::WorTN( string d ) { CustName = d; }

void WorTN::cust_num( ) {

   cout << " \n WorTN parameterized constructor proof\n\n Type customer name
then press 'ENTER' key  ";

   cin >> CustName; cout <<" \n Customer name: "<< CustName <<endl;  }

WorTN::~WorTN( ) {

   cout <<" \n WorTN destructor fx flushed object containing variable value
"<< CustName

<<"\n\n_________________________________________________________________________"<<endl;}


//____________________________________________________________________________

                               //BTN.h interface

class BTN : public WorTN {

public:
   int NumWrkLines;

   BTN( ) {cout <<"\n BTN default constructor proof\n";}

   BTN( int e );

   void cust_num_lines( );

  ~BTN( );

   int GetNumWrkLines( ) const { return NumWrkLines; }
   void SetNumWrkLines( int k ) { NumWrkLines = k; }
};

BTN::BTN( int e ) { NumWrkLines = e; }

void BTN::cust_num_lines( ) {

   cout << " \n BTN parameterized constructor proof\n\n Type number of lines
then press 'ENTER' key  ";
   cin >> NumWrkLines;



BTN::~BTN( ) {

   cout <<" \n BTN destructor fx flushed object containing variable value "<<
NumWrkLines

<<"\n\n_________________________________________________________________________"<<endl;}

//___________________________________________________________________________________

                       //Tnum_main.cpp utilization

ostream &operator<<(ostream &print1, Tnum m) {

   print1 << m.NXX << "-" << m.LINE << "\n";
   return print1; }

ostream &operator<<(ostream &print2, WorTN n) {
   print2 << "\n Customer: "<< n.CustName << "\n";
   return print2; }

ostream &operator<<(ostream &print3, BTN o) {

   return print3; }

ostream& T( ostream& p ) { return p <<'\a'; }

int main( ) {

   Tnum xx;     xx.ph_num( );
   WorTN yy;    yy.cust_num( );
   BTN zz;      zz.cust_num_lines( );

   Tnum x( "(303) ","777-","1111" );
   Tnum y( "(303) ","444-","2222" );
   cout << x << y <<T<<T<<T<<T<<"\n__________________________\n";

   WorTN q( "Security" );
   WorTN r( "Library" );
   cout << q << r <<T<<T<<T<<T<<"\n__________________________\n";

   BTN s( 10 );
   BTN t( 8 );
   cout << s << t <<T<<T<<T<<T<<"\n__________________________\n";

system ("pause");
return 0;
}

[/CODE]