Thread: Drawing a flag with glut library, what i'm doing wrong????

Hi people. My name is Samuel. I'm trying to draw a simple flag, using the glut library on C. For your information, I have my experience working with C# and C++ but I have never tried C before. I let you guys know that so you know that you can talk me with concepts and I will understand. I just copy/paste a code at the web which suppose to draw a simple white and red lines in order to can create a flag with a star on it after that. The code that I have is as follow:

Code:

#include "windows.h"
#include "stdafx.h"
#include "glut.h"
#include <cmath>

void DrawStripes ()

{
int iStripes = 5;

float fDeltaY = 1.0 / iStripes;



float fStartX = 0.0;

float fEndX = 1.0;



for (int iStripeIndex = 0; iStripeIndex < 5; ++iStripeIndex) {


	if (iStripeIndex % 2 == 0) {

      glColor3f(204.0/255.0, 0.0, 0.0); // to make the red color

} else {

         glColor3f(1.0, 1.0, 1.0); // to make the white color

}



float fStartY = iStripeIndex*fDeltaY;

float fEndY = (iStripeIndex + 1)*fDeltaY;



glBegin(GL_QUADS);

glVertex2f(fStartX, fStartY);

glVertex2f(fEndX, fStartY);

glVertex2f(fEndX, fEndY);

glVertex2f(fStartX, fEndY);

glEnd();

}

}

void Initialize() {

            glClearColor(0.0, 0.0, 0.0, 0.0);

            glMatrixMode(GL_PROJECTION);

            glLoadIdentity();

            glOrtho(0.0, 1.0, 0.0, 1.0, -1.0, 1.0);

}
void Draw() {

          
	
DrawStripes();

			
          

}

int main(int iArgc, char** cppArgv) {

            glutInit(&iArgc, cppArgv);

            glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB);

            glutInitWindowSize(900, 500);

            glutInitWindowPosition(200, 200);

            glutCreateWindow("Bandera de Puerto Rico");

            Initialize();

            glutDisplayFunc(Draw);

            glutMainLoop();

            return 0;

}

I run the code and the output is just a white screen. A professor says that he made this code as an example and it should be showing the output that you can see in this link:

http://i1227.photobucket.com/albums/...t1/Coutput.png

I don't have experience in C but knowing C++ I still cant find the error. I'm sorry if this is a dumb question but if someone can help me to get the right output I will really appreciate it.

Samuel