Specifications (minimum):
The CDROM class contains the following, private, data members:
string Name; // The Name of the CDROM
string CDType; // The Type of CDROM
float Cost; // The Cost of the CDROM
The ONLY recognized (i.e., legal) CDROM types are, “Game”, “Word”, “Compiler”, “Spreadsheet”, “Dbase”, and “Presentation” (AND, no others!).
The CDROM class contains the following, public, member functions:
CDROM();
// Constructor – hard-code initializes data members
void LoadInformation();
// Prompt for, input, validate and set all data members
float ReturnCost();
// Return the value in the Cost member data.
void DisplayInformation();
// Display to the screen the values in the data members in a neatly organized manner.
void ChangeData();
// Interactively change the data in the calling object - similar to LoadInformation(), except the old information is being selectively overwritten.
* Since the instructor has allowed them, I've added in some helper mutators to set the information.
I've written the header and cpp files for the class, but I could use help in debugging it while still maintaining the specs of the assignment.
Specifically, the error codes I get for these two files are:
1> CDROM.cpp
1>\cdrom.cpp(103): error C2511: 'float CDROM::ReturnCost(void) const' : overloaded member function not found in 'CDROM'
1>\cdrom.h(40) : see declaration of 'CDROM'
1>cdrom.cpp(108): error C2511: 'void CDROM::DisplayInformation(void) const' : overloaded member function not found in 'CDROM'
1>\cdrom.h(40) : see declaration of 'CDROM'
How do I set up ReturnCost() & DisplayInformation() so that they aren't coming up as an overloaded function?
My Header Code
#ifndef CDROM_H // allows for additional headers
#define CDROM_H
//=============================================================================
// INCLUDE FILES
#include <string>
//
//=============================================================================
// Class Object
class CDROM
//============================================================================
{
public: // available outside of class
CDROM(); // SMF to set value
void LoadInformation(); // member functions
float ReturnCost();
void DisplayInformation();
void ChangeData() ;
private: // not available outside class
void SetName(); // Special Helper Mutators
void SetCost();
void SetType();
private: // Like paragraph indicators - useful to separate things
std::string Name; // The NAME of the CDROM
std::string CDType; // The TYPE of CDROM - Game, Word, Compiler,
std::string Type; // Spreadsheet, DBase, and Presentation
float Cost;
};
//=============================================================================
// END OF CONDITIONAL BLOCK
#endifMy CPP code for the Class:
// INCLUDE FILES
#include "CDROM.h" // for processing CDROM class
#include <iostream> // for io processing
using namespace std;
//
//=============================================================================
// CONSTANT DEFINITIONS
//
//=============================================================================
// EXTERNAL CLASS VARIABLES
//
//=============================================================================
//*****************************************************************************
// BEGINNING OF PROGRAMMING CODE
//*****************************************************************************
CDROM::CDROM() : Cost(0.0), CDType( "6. Presentation" )
{
}
void CDROM::SetName() // Helper functions to do the work of getting,
{ // validating, and displaying the user data.
cout << "Enter Name:" << endl;
cin >> Name; // This will allow good reuse in LoadInformation()
} // & ChangeData().
void CDROM::SetCost() // Needs validation since its a float
{
for ( ;; ) // This will keep the user in the input loop until
// they enter a valid float for Cost.
{
cout << "Enter Cost:" << endl;
cin >> Cost;
if ( !cin || cin.gcount( ) != 1 )
{
cout << "Invalid Cost." << endl;
}
else
{
break;
}
}
}
void CDROM::SetType() // Tricky mutator - have to check it against Each type listed
{
for (;;)
{
cout << "Enter Type:" << endl;
cin >> Type;
if (Type != "Game" && Type != "Word" && Type !="Compiler" && Type !="Spreadsheet" && Type !="DBase" && Type !="Presentation")
{
cout << "Invalid Type." << endl;
}
else
{
break;
}
}
}
void CDROM::LoadInformation()
{
cout << "Enter CDROM Information:" << endl;
SetName( );
SetType( );
SetCost( );
}
float CDROM::ReturnCost() const // Not changing data - make const.
// A good rule of thumb, const by default -
//justify why it isn't.
{
return Cost;
}
void CDROM::DisplayInformation() const // Again, doesn't modify any data member or call any const methods of the class
{
cout <<"Current CDROM Listings Are As Follows: " << endl;
cout << "Name: " << Name << endl;
cout << "Type: " << CDType << endl;
cout << "Cost: " << setprecision(2) << "$ " << Cost << endl;
}
void CDROM::ChangeData()
{
cout << "Change Name? (Y/N)";
char change;
cin >> change;
if ((change == 'Y') || (change == 'y'))
{
SetName();
}
cout << "Change Type? (Y/N)";
cin >> change;
if ((change == 'Y') || (change == 'y'))
{
SetType();
}
cout << "Change Cost? (Y/N)";
cin >> change;
if ((change == 'Y') || (change == 'y'))
{
SetCost();
}
}