if (!glfwInit()) {
     // Handle initialization failure
     return -1;
}

glfwGetVersionString();

glfwTerminate();

  GLFWwindow* window;

  window = glfwCreateWindow(640, 480, "Hello World", NULL, NULL);
    if (!window)
    {
        glfwTerminate();
        return -1;
    }

      /* Make the window's context current */
    glfwMakeContextCurrent(window);

  while (!glfwWindowShouldClose(window))
    {
        /* Render here */
        glClear(GL_COLOR_BUFFER_BIT);

        /* Swap front and back buffers */
        glfwSwapBuffers(window);

        /* Poll for and process events */
        glfwPollEvents();
    }

glfwDestroyWindow(window);