From 33613a85afc4b1481367fbe92a17ee59c240250b Mon Sep 17 00:00:00 2001 From: Sven Eisenhauer Date: Fri, 10 Nov 2023 15:11:48 +0100 Subject: add new repo --- Bachelor/Prog2/Z-Uebung/Teil1/shape.h | 120 ++++++++++++++++++++++++++++++++++ 1 file changed, 120 insertions(+) create mode 100644 Bachelor/Prog2/Z-Uebung/Teil1/shape.h (limited to 'Bachelor/Prog2/Z-Uebung/Teil1/shape.h') diff --git a/Bachelor/Prog2/Z-Uebung/Teil1/shape.h b/Bachelor/Prog2/Z-Uebung/Teil1/shape.h new file mode 100644 index 0000000..a304329 --- /dev/null +++ b/Bachelor/Prog2/Z-Uebung/Teil1/shape.h @@ -0,0 +1,120 @@ +// shape.h +// Definition of classes Point, Shape and Polyline. + +#ifndef SHAPE_H +#define SHAPE_H + +#include +using std::string; +using std::stringstream; +using std::ostream; + +#include // sqrt + +// class Point +struct Point +{ + double x, y; + Point( double xx = 0.0, double yy = 0.0 ) + : x( xx ), y( yy ) { } + + double distance( const Point& p2 ) const + { + double dx = x - p2.x, + dy = y - p2.y; + return sqrt( dx * dx + dy * dy ); + } + string toString() const + { + stringstream sstream; + sstream << '(' << x << ", " << y << ')'; + return sstream.str(); + } + Point& operator*=( double c ) + { x *= c; y *= c; return *this; } +}; + +inline Point operator+( const Point& p1, const Point& p2 ) +{ + return Point( p1.x + p2.x, p1.y + p2.y ); +} + +inline Point operator-( const Point& p1, const Point& p2 ) +{ + return Point( p1.x - p2.x, p1.y - p2.y ); +} + +inline bool operator==( const Point& p1, const Point& p2 ) +{ + return p1.x == p2.x && p1.y == p2.y; +} + +inline bool operator!=( const Point& p1, const Point& p2 ) +{ + return !( p1 == p2 ); +} + +inline ostream& operator<<( ostream& os, const Point& p ) +{ + os << p.toString(); + return os; +} + +// class Shape +class Shape +{ + protected: + Point anchor; // anchor: point of reference for position of figure + public: + Shape( const Point& a = Point() ) : anchor( a ) { } + virtual ~Shape() {} + + Point getAnchor() const { return anchor; } + void setAnchor( Point a ) { anchor = a; } + + void move( double dx, double dy ) // displacement + { anchor.x += dx; anchor.y += dy; } + + virtual void scale( double scalingFactor ) = 0; + virtual void draw() const = 0; + + virtual string toString() const + { + string str( "Shape-Anker: " ); + return str += anchor.toString(); + } +}; + +// class Polyline +class Polyline : public Shape +{ + protected: + Point* arrPoints; // end-points of lines, relativ to anchor + int nLines; // number of line-segments == number of end-points + + public: + Polyline( const Point& a = Point() ) // only one point + : Shape( a ), nLines( 0 ), arrPoints( NULL ) { } + Polyline( const Point& p1, const Point& p2 ) // one line + : Shape( p1 ), nLines( 1 ) + { + arrPoints = new Point( p2 - p1 ); + } + Polyline( Point arr[], int n ); + Polyline( const Polyline& src ); // copy constructor + ~Polyline() { delete [] arrPoints; } // destructor + + Polyline& operator=( const Polyline& src ); // assignment + + int getNumberOfLines() const { return nLines; } + double getLength() const; + void scale( double scalingFactor ); // scaling + virtual void draw() const { } + + Polyline& operator+=( const Point& p ); // appends a new point + Polyline& operator+=( const Polyline& pl ); // appends a new line + + string toString() const; +}; + +#endif -- cgit v1.2.3