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// author : Sven Gothel - Stapenhorststrasse 35a - 33615 Bielefeld
//
// menge.h
//
// Original von
// Martin Schader & Stefan Kuhlins : Programmieren in C++, Springer Verlag,
// ISBN-3-540-56524-8
//
// Kapitel 18, Aufgabe 9
//
/*
*
* $Log: menge.h $
* Revision 1.4 1995/04/07 16:54:53 Sven_Gothel
* *** empty log message ***
* Revision 1.3 1995/04/04 10:37:29 Sven_Gothel
* *** empty log message ***
* Revision 1.2 1994/12/15 15:28:16 Sven_Gothel
* the very first check in !!!
* all files contains the log message now !!!
* Sven Gothel, Bielefeld 14.12.1994 !!!
*
* Revision 1.1 1994/12/15 15:18:42 Sven_Gothel
* Initial revision
*
*/
# ifndef _MENGE_H
# define _MENGE_H
#include <iostream>
#include "liste.h" // Template-Liste
template<class T> class Menge {
public:
int leer() const { return l.laenge() == 0; }
int card() const { return l.laenge(); }
int istElement(const T&);
int fuegeEin(const T&);
int loesche(const T&);
void inhalt() const;
Menge operator*(Menge&) const;
private:
Liste<T> l;
};
template<class T> int Menge<T>::fuegeEin(const T& x)
{
return (istElement(x) >= 0) ? 0 : l.fuegeEin(x);
}
template<class T> int Menge<T>::loesche(const T& x)
{
int pos = istElement(x);
if (pos >= 0)
l.loesche(pos);
return pos >= 0;
}
template<class T> int Menge<T>::istElement(const T& x)
{
for (int i = 0; i < card(); i++)
if (l[i] == x)
return i;
return -1;
}
template<class T> void Menge<T>::inhalt() const
{
std::cout << "{ ";
if (!leer()) {
std::cout << l[0];
for (int i=1; i<card(); i++) {
std::cout << ", " << l[i];
}
}
std::cout << " }" << std::endl;
}
template<class T> Menge<T> Menge<T>::operator*(Menge<T>& a) const
{
Menge<T> axb;
for (int i=0; i<card(); i++)
if (a.istElement(l[i]) >= 0)
axb.fuegeEin(l[i]);
return axb;
}
// TESTTEIL DER MENGE ::
/*
int main()
{
Menge<int> m1;
m1.fuegeEin(127);
m1.fuegeEin(214);
m1.fuegeEin(63);
cout << "m1 = "; m1.inhalt();
Menge<int> m2;
m2.fuegeEin(127);
m2.fuegeEin(210);
m2.fuegeEin(63);
cout << "m2 = "; m2.inhalt();
const Menge<int> x = m1*m2;
cout << "m1*m2 = "; x.inhalt();
return 0;
}
*/
# endif
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