Bjarne Stroustrup “Programming Principles and Practice Using C++”
Chapter 13 Exercise 5
Using GUI library called FLTK (Fast Light Tool Kit, “full tick”).
Output:
[code language=”cpp”]
// Philipp Siedler
// Bjarne Stroustrup’s PP
// Chapter 13 Exercise 5
#define _USE_MATH_DEFINES
#include "Simple_window.h"
#include "Graph.h"
#include <cmath>
using namespace Graph_lib;
ostream& operator<<(ostream& out, Point& a) {
out << "(" << a.x << "," << a.y << ")";
return out;
}
Point& operator+=(Point& a, Point& b) {
a = Point(a.x + b.x, a.y + b.y);
return a;
}
// CIRCLE ——————————-
Point centerCircle(Graph_lib::Circle& cir) {
return Point(cir.point(0).x + cir.radius(), cir.point(0).y + cir.radius());
}
Point nC(Graph_lib::Circle& cir) {
Point temp = centerCircle(cir);
return Point(temp.x, temp.y – cir.radius());
}
Point neC(Graph_lib::Circle& cir) {
Point temp = centerCircle(cir);
return Point(temp.x + cir.radius() * cos(M_PI / 4), temp.y – cir.radius() * sin(M_PI / 4));
}
Point eC(Graph_lib::Circle& cir) {
Point temp = centerCircle(cir);
return Point(temp.x + cir.radius(), temp.y);
}
Point seC(Graph_lib::Circle& cir) {
Point temp = centerCircle(cir);
return Point(temp.x + cir.radius() * cos(M_PI / 4), temp.y + cir.radius() * sin(M_PI / 4));
}
Point sC(Graph_lib::Circle& cir) {
Point temp = centerCircle(cir);
return Point(temp.x, temp.y + cir.radius());
}
Point swC(Graph_lib::Circle& cir) {
Point temp = centerCircle(cir);
return Point(temp.x – cir.radius() * cos(M_PI / 4), temp.y + cir.radius() * sin(M_PI / 4));
}
Point wC(Graph_lib::Circle& cir) {
Point temp = centerCircle(cir);
return Point(temp.x – cir.radius(), temp.y);
}
Point nwC(Graph_lib::Circle& cir) {
Point temp = centerCircle(cir);
return Point(temp.x – cir.radius() * cos(M_PI / 4), temp.y – cir.radius() * sin(M_PI / 4));
}
// ELLIPSE ——————————-
Point nE(Graph_lib::Ellipse& eli) {
int a = eli.major(); //width
int b = eli.minor(); //height
cout << a << endl;
cout << b << endl;
int x = eli.center().x;
int y = eli.center().y – b;
return Point(x,y);
}
Point neE(Graph_lib::Ellipse& eli) {
int a = eli.major(); //width
int b = eli.minor(); //height
cout << a << endl;
cout << b << endl;
int x = eli.center().x + a * cos(M_PI / 4);
int y = eli.center().y – b * sin(M_PI / 4);
return Point(x, y);
}
Point eE(Graph_lib::Ellipse& eli) {
int a = eli.major(); //width
int b = eli.minor(); //height
cout << a << endl;
cout << b << endl;
int x = eli.center().x + a;
int y = eli.center().y;
return Point(x, y);
}
Point seE(Graph_lib::Ellipse& eli) {
int a = eli.major(); //width
int b = eli.minor(); //height
cout << a << endl;
cout << b << endl;
int x = eli.center().x + a * cos(M_PI / 4);
int y = eli.center().y + b * sin(M_PI / 4);
return Point(x, y);
}
Point sE(Graph_lib::Ellipse& eli) {
int a = eli.major(); //width
int b = eli.minor(); //height
cout << a << endl;
cout << b << endl;
int x = eli.center().x;
int y = eli.center().y + b;
return Point(x, y);
}
Point swE(Graph_lib::Ellipse& eli) {
int a = eli.major(); //width
int b = eli.minor(); //height
cout << a << endl;
cout << b << endl;
int x = eli.center().x – a * cos(M_PI / 4);
int y = eli.center().y + b * sin(M_PI / 4);
return Point(x, y);
}
Point wE(Graph_lib::Ellipse& eli) {
int a = eli.major(); //width
int b = eli.minor(); //height
cout << a << endl;
cout << b << endl;
int x = eli.center().x – a;
int y = eli.center().y;
return Point(x, y);
}
Point nwE(Graph_lib::Ellipse& eli) {
int a = eli.major(); //width
int b = eli.minor(); //height
cout << a << endl;
cout << b << endl;
int x = eli.center().x – a * cos(M_PI / 4);
int y = eli.center().y – b * sin(M_PI / 4);
return Point(x, y);
}
int main()
try
{
Point tl(100, 100);
Simple_window win(tl, 600, 400, "Simple Window");
//CIRCLE
Graph_lib::Circle testCircle(Point(200, 200), 50);
testCircle.set_color(Color::red);
Point ptCircle = neC(testCircle);
Mark markCircle(ptCircle, ‘+’);
markCircle.set_color(Color::blue);
cout << ptCircle << endl;
win.attach(testCircle);
win.attach(markCircle);
//ELLIPSE
Graph_lib::Ellipse testEllipse(Point(400, 200), 100, 50);
testEllipse.set_color(Color::red);
Point ptEllipse = neE(testEllipse);
Mark markEllipse(ptEllipse, ‘+’);
markEllipse.set_color(Color::blue);
cout << ptEllipse << endl;
win.attach(testEllipse);
win.attach(markEllipse);
win.wait_for_button();
}
catch (exception& e) {
cout << e.what() << endl;
return 1;
}
catch (…) {
cout << "Exiting" << endl;
return 2;
}
[/code]
