#include <GL/glew.h>
#include <GL/freeglut.h>
#include <iostream>

using namespace std;

int main(int argc, char **argv) {
	// initialize GLUT
	glutInitContextVersion(4,1);
	glutInitContextFlags(GLUT_FORWARD_COMPATIBLE);
	glutInitContextProfile(GLUT_CORE_PROFILE);
	glutInit(&argc, argv);
	glutInitWindowSize(800,600);
	glutCreateWindow("Testing OpenGL 4.1...");

	// initialize GLEW
	GLenum GlewInitResult;
	glewExperimental = GL_TRUE;
	GlewInitResult = glewInit();

	if(GLEW_OK != GlewInitResult) {
		cerr << "Error: " << glewGetErrorString(GlewInitResult) << endl;
		exit(EXIT_FAILURE);
	}

	// display system information

	cout << "GLEW Version " << glewGetString(GLEW_VERSION) << endl
		 << "Vendor: " << glGetString(GL_VENDOR) << endl
		 << "Renderer: " << glGetString(GL_RENDERER) << endl
		 << "OpenGL Version: " << glGetString (GL_VERSION) << endl
		 << "GLSL Version: " << glGetString(GL_SHADING_LANGUAGE_VERSION) << endl;

    GLint nExtensions;
    glGetIntegerv(GL_NUM_EXTENSIONS, &nExtensions);
    cout << "Number of Extensions: " << nExtensions << endl
    	 << "\nExtensions loaded..." << endl;
    for( int i = 0; i < nExtensions; i++ ) {
        cout << glGetStringi(GL_EXTENSIONS, i) << endl;
    }
	glutMainLoop();
	return 0;
}