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Help with instance of one class in another

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Join Date: Oct 2008

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jbrock31

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Help with instance of one class in another

Nov 21st, 2008

Hello everyone.

I need help using an instance of a class in another. Below are two header files. NumDays.h and TimeOff.h

I need to have instances of the NumDays class in the TimeOff class as members. When i try to create the instance called maxSickDays, i do not get access to the NumDays member functions. What is wrong with my code? Thanks in advance.

NumDays.h

 Help with Code Tags 
 C++ Syntax (Toggle Plain Text) 
#ifndef NUMDAYS
#define NUMDAYS
#include <iostream>
 
class NumDays
{
 
private:
	int hours;
	float days;
	float calcDays();
 
public:
	NumDays()
	{ hours = 0; days = 0.0; }
 
	void setHours(int hrs)
	{ hours = hrs; }
	int getHours()
	{ return hours; }
	float getDays();
 
	NumDays operator + ( const NumDays& );
	NumDays operator - ( const NumDays& );
	NumDays operator --();
	NumDays operator ++();
	NumDays operator ++ ( int );
	NumDays operator -- ( int );
 
};
 
#endif
#ifndef NUMDAYS
#define NUMDAYS
#include <iostream>

class NumDays
{

private:
	int hours;
	float days;
	float calcDays();

public:
	NumDays()
	{ hours = 0; days = 0.0; }

	void setHours(int hrs)
	{ hours = hrs; }
	int getHours()
	{ return hours; }
	float getDays();
	
	NumDays operator + ( const NumDays& );
	NumDays operator - ( const NumDays& );
	NumDays operator --();
	NumDays operator ++();
	NumDays operator ++ ( int );
	NumDays operator -- ( int );

};

#endif

and now TimeOff.H

 Help with Code Tags 
 C++ Syntax (Toggle Plain Text) 
#ifndef TIMEOFF
#define TIMEOFF
#include <iostream>
#include "NumDays.h"
#include <string>
using namespace std;
 
class TimeOff
{
private:
	string name;
	int idNum;
	NumDays maxSickDays;
 
public:
	TimeOff();
 
 
	void setName ( string n )
	{ name = n; }
	void setIdNum ( int id )
	{ idNum = id; }
 
	string getName()
	{ return name; }
	int getIdNum()
	{ return idNum; }
 
};
 
#endif
#ifndef TIMEOFF
#define TIMEOFF
#include <iostream>
#include "NumDays.h"
#include <string>
using namespace std;

class TimeOff
{
private:
	string name;
	int idNum;
	NumDays maxSickDays;
		
public:
	TimeOff();
	

	void setName ( string n )
	{ name = n; }
	void setIdNum ( int id )
	{ idNum = id; }

	string getName()
	{ return name; }
	int getIdNum()
	{ return idNum; }
	
};

#endif

Thank you!

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Join Date: Nov 2008

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Re: Help with instance of one class in another

Nov 21st, 2008

Can I see the part where you try to access the NumDays()?

"Jedenfalls bin ich überzeugt, daß der Alte nicht würfelt."
"I became very sensitive to what will happen to all this and all of us." -Two geniuses named Albert

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Join Date: Oct 2008

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Re: Help with instance of one class in another

Nov 21st, 2008

Oops. I took all the calls to that when it would not work. Below is TimeOff.h where i am trying to use the maxSickDays instance and then its setHours member function. Thank you.

 Help with Code Tags 
 C++ Syntax (Toggle Plain Text) 
#ifndef TIMEOFF
#define TIMEOFF
#include <iostream>
#include "NumDays.h"
#include <string>
using namespace std;
 
class TimeOff
{
private:
	string name;
	int idNum;
	NumDays maxSickDays;
 
public:
	TimeOff();
 
 
	void setName ( string n )
	{ name = n; }
	void setIdNum ( int id )
	{ idNum = id; }
 
	void setMaxSickDays( int h )
	{ maxSickDays.setHours(h); }    /// trying to access this instance of NumDays
 
 
	string getName()
	{ return name; }
	int getIdNum()
	{ return idNum; }
 
 
 
};
 
#endif
#ifndef TIMEOFF
#define TIMEOFF
#include <iostream>
#include "NumDays.h"
#include <string>
using namespace std;

class TimeOff
{
private:
	string name;
	int idNum;
	NumDays maxSickDays;
		
public:
	TimeOff();
	

	void setName ( string n )
	{ name = n; }
	void setIdNum ( int id )
	{ idNum = id; }

	void setMaxSickDays( int h )
	{ maxSickDays.setHours(h); }    /// trying to access this instance of NumDays


	string getName()
	{ return name; }
	int getIdNum()
	{ return idNum; }

	
	
};

#endif

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Join Date: Oct 2008

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jbrock31

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Re: Help with instance of one class in another

Nov 21st, 2008

I figured out my problem. When i defined the mutator and accessor functions in the cpp file instead of the header i was able to access the nested class' member variables and functions. Below are my revised header and cpp files.

TimeOff.h

 Help with Code Tags 
 C++ Syntax (Toggle Plain Text) 
#ifndef TIMEOFF
#define TIMEOFF
#include <iostream>
#include "NumDays.h"
#include <string>
using namespace std;
 
class TimeOff
{
private:
	string name;
	int idNum;
	NumDays maxSickDays;
 
 
public:
	TimeOff();
 
 
	void setName ( string n )
	{ name = n; }
	void setIdNum ( int id )
	{ idNum = id; }
	void setMaxSickDays( int );
 
 
 
	float getMaxSickDays();
	string getName()
	{ return name; }
	int getIdNum()
	{ return idNum; }
 
 
 
};
 
#endif
#ifndef TIMEOFF
#define TIMEOFF
#include <iostream>
#include "NumDays.h"
#include <string>
using namespace std;

class TimeOff
{
private:
	string name;
	int idNum;
	NumDays maxSickDays;
	
		
public:
	TimeOff();
	

	void setName ( string n )
	{ name = n; }
	void setIdNum ( int id )
	{ idNum = id; }
	void setMaxSickDays( int );



	float getMaxSickDays();
	string getName()
	{ return name; }
	int getIdNum()
	{ return idNum; }


	
};

#endif

now TimeOff.cpp

 Help with Code Tags 
 C++ Syntax (Toggle Plain Text) 
#include "TimeOff.h"
#include "NumDays.h"
#include <iostream>
#include <string>
using namespace std;
 
TimeOff::TimeOff()
{
	name = "";
	idNum = 0;
	maxSickDays.setHours(0);
//	sickTaken.setHours(0);
//	maxVacation.setHours(0);
//	vacTaken.setHours(0);
//	maxUnpaid.setHours(0);
//	unpaidTaken.setHours(0);
}
void TimeOff::setMaxSickDays ( int hrs )
{
	maxSickDays.setHours(hrs);
 
}
float TimeOff::getMaxSickDays()
{
	return maxSickDays.getDays();
}
#include "TimeOff.h"
#include "NumDays.h"
#include <iostream>
#include <string>
using namespace std;

TimeOff::TimeOff()
{
	name = "";
	idNum = 0;
	maxSickDays.setHours(0);
//	sickTaken.setHours(0);
//	maxVacation.setHours(0);
//	vacTaken.setHours(0);
//	maxUnpaid.setHours(0);
//	unpaidTaken.setHours(0);
}
void TimeOff::setMaxSickDays ( int hrs )
{
	maxSickDays.setHours(hrs);
	
}
float TimeOff::getMaxSickDays()
{
	return maxSickDays.getDays();
}