// windows.h needed for Windows 2000/Visual Studio 
#ifdef WIN32
  #include <windows.h>
#endif

// MacOS uses frameworks/different paths 
#ifdef __APPLE__
  #include <OPENGL/gl.h>
  #include <GLUT/glut.h>
#else
  #include <GL/gl.h>
  #include <GL/glut.h>
#endif

#include <stdio.h>

int main(int argc, char **argv)
{
  glutInit(&argc, argv);
  glutInitWindowSize(200,200);
  glutCreateWindow("Window");
  fprintf(stderr, "%s\n", glGetString(GL_VERSION));
  glutMainLoop();
  return 0; 
}