Using Gui in C++ Draw a rectangle as a Rectangle and as a Polygon . Make the lin

Question

Using Gui in C++

Draw a rectangle as a Rectangle and as a Polygon. Make the lines of the Polygon yellow and the lines of the Rectangle green.

Draw a 200-by-50 Rectangle and place the text “Hi there!” inside it.

Draw your initials 100 pixels high. Use a thick Line. Draw each initial in a different colour.

Draw a chess board: 8-by-8 alternating yellow and blue squares. [Hint: Use a loop or two! ]

Draw a white 5-mm frame around a rectangle that is three-quarters the height of your screen and two-thirds the width.

Draw a two-dimensional house seen from the front, the way a child would: with a door, two windows, and a roof with a chimney. Feel free to add details; maybe have “smoke” come out of the chimney...

Explanation / Answer

Qn.3.

/**
* Draw your initials 100 pixels high. Use a thick line. Draw each initial
* in a different color.
*/

#include <stdexcept>
#include <FL/Fl_Window.H>
#include "Simple_window.h"
#include "Graph.h"

int main()
{
   using namespace Graph_lib; // our graphics facilities are in Graph_lib

try
{
   Point tl(100,100); // top left corner of window
   Simple_window win(tl,600,400,"ch12ex03"); // make a simple window

   // draw initial 'J'
   Line init_J1(Point(100,50),Point(250,50));
   init_J1.set_color(Color::red);
   init_J1.set_style(Line_style(Line_style::solid,10));
   win.attach(init_J1); // connect poly to the window

   Line init_J2(Point(175,50),Point(175,175));
   init_J2.set_color(Color::red);
   init_J2.set_style(Line_style(Line_style::solid,10));
   win.attach(init_J2); // connect poly to the window

   Open_polyline init_J3;
   init_J3.add(Point(175,175));
   init_J3.add(Point(155,200));
   init_J3.add(Point(120,200));
   init_J3.add(Point(100,175));
   init_J3.set_color(Color::red);
   init_J3.set_style(Line_style(Line_style::solid,10));
   win.attach(init_J3); // connect poly to the window

   // draw initial 'A'
   Open_polyline init_J4;
   init_J4.add(Point(300,200));
   init_J4.add(Point(350,50));
   init_J4.add(Point(400,200));
   init_J4.add(Point(382,150));
   init_J4.add(Point(320,150));
   init_J4.set_color(Color::blue);
   init_J4.set_style(Line_style(Line_style::solid,10));
   win.attach(init_J4); // connect poly to the window

   win.wait_for_button(); // display
}
catch(exception& e) {
   cerr <<"exception: " << e.what() << endl;
   return 1;
}
catch(...) {
   cerr << "Some exception ";
   return 2;
}
} // main()

Qn5. Draw a white 5-mm frame around a rectangle that is three-quarters the height of your screen and two-thirds the width.

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