From: "Luismurf" <luismurf AT yahoo DOT co DOT uk>
Newsgroups: comp.os.msdos.djgpp
Subject: object oriented
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Message-ID: <vFOO6.5245$FL1.698492@afrodite.telenet-ops.be>
Date: Wed, 23 May 2001 13:10:51 GMT
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To: djgpp AT delorie DOT com
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Reply-To: djgpp AT delorie DOT com

Hey smart people,

This is my first attempt of an employee list.
classes                                            variables
person                                            naam (name)
|
+bediende (=servant)                    wedde (loan)
|    |
|    +verkoper (=salesman)            verkoopcijfer (items saled)
|
+arbeider (=worker)                    uur (hours worked)
                                                    loon (loan/hour)

hmm, well I hope you'll get the idea ;-)

How can i compile this in djgpp? Do I have to make a project or do I have to
link these files. And how do you do all this in djgpp?

Please help me out!

here's my source:
---person.h------------------------------
#ifndef PERSON.H
#define PERSON.H

class person
{
protected:            file://subclasses kunnen die zien
        char naam[25];
        double salaris;
public:
        virtual void display(void);
};

#endif
------------------------------------------
---person.cpp----------------------------
#include <iostream.h>
#include "person.h"

            // This method should never be called.  If it is ever
            // called, it is considered an error.
void
person::display(void)
{
   cout << "person::display - missing subclass method\n";
}
------------------------------------------
---beroep.h------------------------------
#ifndef BEROEP.H
#define BEROEP.H

file://Hier worden drie subclasses van person gemaakt.
file://bediende, arbeider en verkoper

#include "person.h"

class bediende : public person
{
        double wedde;
 public:
        void init_data(char in_naam[], double in_wedde);
        void display(void);
};

class arbeider : public person
{
        double uur;
        double loon;
 public:
        void init_data(char in_naam[], double in_uur, double in_loon);
        void display(void);
};

class verkoper : public bediende
{
        double verkoopcijfer;
 public:
        void init_data(char in_naam[], double in_wedde, double
in_verkoopcijfer);
        void display(void);
};

#endif
------------------------------------------
---beroep.cpp----------------------------
#include <iostream.h>
#include <string.h>
#include "person.h"
#include "beroep.h"

void
bediende::init_data(char in_naam[], double in_wedde)
{
   strcpy(naam,in_naam);
   salaris = in_wedde;
}

void
bediende::display(void)
{                               
   cout << "Bediende --> " << naam << " verdient " << salaris <<".\n";
}

void
arbeider::init_data(char in_naam[], double in_uur, double in_loon)
{
   strcpy(naam,in_naam);
   salaris = in_uur*in_loon;
}

void
arbeider::display(void)
{
   cout << "Arbeider --> " << naam << " verdient " << salaris << ".\n";
}

void
verkoper::init_data(char in_naam[], double in_wedde, double in_verkoopcijfer)
{
   strcpy(naam,in_naam);
   salaris = in_wedde+in_verkoopcijfer*0.01;
}

void
verkoper::display(void)
{
   cout << "Verkoper --> " << naam << " verdient " << salaris << ".\n";
}
------------------------------------------
---bereken.cpp---------------------------
#include <iostream.h>
#include "person.h"
#include "beroep.h"

person *staff[10];

int main()
{
 bediende *bedpt;
 arbeider *arbpt;
 verkoper *verpt;

 bedpt = new bediende;
 bedpt->init_data("Albert",40000.0);
 staff[0]=bedpt;
/*
 arbpt = new arbeider;
 arbpt->init_data("Cyriel",150,300.0);
 staff[1]=arbpt;

 verpt = new verkoper;
 verpt->init_data("Bea",20000.0,1000000.0);
 staff[2]=verpt;

 for (int index=0;index<3;index++)
 {
 staff[index]->display();
 }
*/
 staff[0]->display();
 cout << "End of list\n";
 return 0;
}
------------------------------------------
~END OF SOS~