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// �bung PG 2, Teil 4
// inhomogeneous list for Shape-Objects (2nd version)
// Author: Prinz / Kirch-Prinz / Weber
// Date: 26.05.05
#include <iostream>
#include "shapeList.h"
using namespace std;
int main()
{
cout << "\n\t *** Eine Liste geometrischer Figuren ***\n"
<< endl;
ShapePtrList myShapes;
cout << myShapes.toString() << endl; // print list
cout << "Elemente in die Liste einfuegen: " << endl;
// append at end of list:
myShapes.push_back( new Line( Point( 0, 0 ), Point( 2, 2 ) ) );
myShapes.push_back( new Rectangle( Point( -1, -1 ), 2, 2) );
// insert ellipse at front of list:
myShapes.push_front( new Ellipse( Point( 0, 0 ), 3, 1) );
Point vertices[] = { Point( 0, -3 ), Point( -3, 0 ), Point( 0, 3 ), Point( 3, 0 ) };
Shape* ptr = new Polygon( vertices, 4 ); // a rombus
// insert polygon as second element:
myShapes.insert( ++myShapes.begin(), ptr );
// a circle as last-but-one element:
ShapePtrList::iterator pos = // position of circle
myShapes.insert( --myShapes.end(), new Circle( Point( 0, 0 ), 5 ) );
( *pos )->scale( 0.7 ); // make this element smaller
cout << "Anzahl Elemente in der Liste: "
<< myShapes.size() << endl;
cout << myShapes.toString() << endl; // print list
cout << "Figur vor dem Kreis loeschen ... " << endl;
myShapes.erase( --pos );
cout << "und die zweite Figur (das Polygon) verschieben: " << endl;
pos = myShapes.begin();
ptr = *( ++pos ); // second element = pointer to polygon
ptr->move( 0, 3 ); // move upwards
cout << "Die veraenderte Liste: " << endl
<< myShapes.toString(); // print list
cin.get();
cout << "Kopie der Liste anlegen "
"und Groesse der Figuren verdoppeln:" << endl;
ShapePtrList yourShapes( myShapes ); // use of copy constructor
yourShapes.scale( 2.0 ); // double size of figures
cout << yourShapes.toString() << endl; // print new list
cout << "Die urspruengliche Liste ist unveraendert:\n"
<< myShapes.toString() << endl; // print old list
cout << "Zuweisung von Listen testen!\n"
<< "Erste Figur (Ellipse) in der neuen Liste loeschen"
<< endl;
yourShapes.pop_front();
cout << "und die Liste der urspruengliche Liste zuweisen:" << endl;
myShapes = yourShapes; // assignment
cout << myShapes.toString(); // print result
cin.get();
return 0;
}
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