000
17.04.2014, 03:55 Uhr
Yadgar
|
Hi(gh)!
Zwei Klassen für POV-Ray-Objekte, eine für Koordinatentripel:
| C++: |
class POV_point
{
private:
string name;
float xval;
float yval;
float zval;
public:
POV_point (float, float, float);
POV_point (string, float, float, float);
void set (float, float, float);
void dump (void);
};
POV_point::POV_point (float x, float y, float z)
{
xval = x;
yval = y;
zval = z;
}
POV_point::POV_point(string n, float x, float y, float z)
{
name = n;
xval = x;
yval = y;
zval = z;
}
void POV_point::set (float x, float y, float z)
{
xval = x;
yval = y;
zval = z;
}
void POV_point::dump (void)
{
if (name.compare("")) cout << name << ":" << endl;
cout << "<" << xval << ", " << yval << ", " << zval << ">" << endl;
cout << endl;
}
|
eine für Quader ("box"):
| C++: |
class POV_box
{
private:
const string type = "box";
string name;
POV_point corner1;
POV_point corner2;
public:
POV_box (string, float, float, float, float, float, float);
void set (float, float, float, float, float, float);
void dump (void);
};
POV_box::POV_box (string n, float x1, float y1, float z1, float x2, float y2, float z2)
{
name = n;
POV_point corner1 (x1, y1, z1);
POV_point corner2 (x2, y2, z2);
}
void POV_box::set (float x1, float y1, float z1, float x2, float y2, float z2)
{
corner1.set (x1, y1, z1);
corner2.set (x2, y2, z2);
}
void POV_box::dump (void)
{
cout << type << "\n"
<< "{" << "\n"
<< " " << endl;
corner1.dump();
cout << ", " << endl;
corner2.dump();
cout << "\n" << "}" << "\n" << endl;
}
|
Der Compiler erkennt anscheinend nicht, dass der Aufruf des Konstruktors von POV_point innerhalb des Konstruktors von POV_box durchaus dem Prototypen in POV_point (der Konstruktor ist überladen, ich verwende hier die Version ohne Namensstring) entspricht, ich bekomme eine Riesenlatte an Fehlermeldungen:
| Code: |
yadgar@debian:/media/Raytracing/Povscn/Flags/Coats of Arms$ g++ -std=c++11 flagmaker.cc -o flagmaker
flagmaker.cc: In constructor ‘POV_box::POV_box(std::string, float, float, float, float, float, float)’:
flagmaker.cc:63:87: error: no matching function for call to ‘POV_point::POV_point()’
flagmaker.cc:63:87: note: candidates are:
flagmaker.cc:28:1: note: POV_point::POV_point(std::string, float, float, float)
flagmaker.cc:28:1: note: candidate expects 4 arguments, 0 provided
flagmaker.cc:21:1: note: POV_point::POV_point(float, float, float)
flagmaker.cc:21:1: note: candidate expects 3 arguments, 0 provided
flagmaker.cc:7:7: note: POV_point::POV_point(const POV_point&)
flagmaker.cc:7:7: note: candidate expects 1 argument, 0 provided
flagmaker.cc:7:7: note: POV_point::POV_point(POV_point&&)
flagmaker.cc:7:7: note: candidate expects 1 argument, 0 provided
flagmaker.cc:63:87: error: no matching function for call to ‘POV_point::POV_point()’
flagmaker.cc:63:87: note: candidates are:
flagmaker.cc:28:1: note: POV_point::POV_point(std::string, float, float, float)
flagmaker.cc:28:1: note: candidate expects 4 arguments, 0 provided
flagmaker.cc:21:1: note: POV_point::POV_point(float, float, float)
flagmaker.cc:21:1: note: candidate expects 3 arguments, 0 provided
flagmaker.cc:7:7: note: POV_point::POV_point(const POV_point&)
flagmaker.cc:7:7: note: candidate expects 1 argument, 0 provided
flagmaker.cc:7:7: note: POV_point::POV_point(POV_point&&)
flagmaker.cc:7:7: note: candidate expects 1 argument, 0 provided
|
und kann mir beim besten Willen keinen Reim darauf machen!
Vor einigen Tagen wurde eine ähnliche Konstruktion, ebenfalls mit geschachtelten Konstruktoren:
| C++: |
class SVG_color
{
private:
short red;
short green;
short blue;
string name;
public:
SVG_color (short, short, short); // Konstruktor, ohne Namensstring
SVG_color (string, short, short, short); // Konstruktor, mit Namensstring
void set (short, short, short); // Zuweisung
void dump (void); // Anzeige der Element-Werte
};
SVG_color::SVG_color(short r=0, short g=0, short b=0)
{
red = r;
green = g;
blue = b;
}
SVG_color::SVG_color(string n, short r=0, short g=0, short b=0)
{
name = n;
red = r;
green = g;
blue = b;
}
void SVG_color::set(short r=0, short g=0, short b=0)
{
red = r;
green = g;
blue = b;
}
void SVG_color::dump(void)
{
if (name.compare("")) cout << name << ":" << endl;
cout << "Red: " << red << ", " << "Green: " << green << ", " << "Blue: " << blue << endl;
cout << endl;
}
class SVG_rectangle
{
private:
unsigned int startx;
unsigned int starty;
unsigned int width;
unsigned int height;
string name;
SVG_color fill;
public:
SVG_rectangle (string, unsigned int, unsigned int, unsigned int, unsigned int, short, short, short); // Konstruktor
void set (unsigned int, unsigned int, unsigned int, unsigned int, short, short, short); // Zuweisung
void dump (void); // Anzeige der Element-Werte
};
SVG_rectangle::SVG_rectangle(string n, unsigned int w, unsigned int h, unsigned int x=0, unsigned int y=0, short r=0, short g=0, short b=0)
{
name = n;
startx = x;
starty = y;
width = w;
height = h;
SVG_color fill(r, g, b);
}
void SVG_rectangle::set(unsigned int w, unsigned int h, unsigned int x=0, unsigned int y=0, short r=0, short g=0, short b=0)
{
startx = x;
starty = y;
width = w;
height = h;
fill.set(r, g, b);
}
void SVG_rectangle::dump(void)
{
cout << name << ":" << endl;
cout << "Upper left corner: x=" << startx << ", y=" << starty << endl;
cout << "Width: " << width << endl;
cout << "Height: " << height << endl;
cout << "Fill:" << endl;
fill.dump();
}
|
problemlos kompiliert! Wo soll da der Unterschied sein? Ich sehe keinen...
Bis bald im Khyberspace!
Yadgar
--
Flagmaker - ein Programmier-Blog |
