Why is the SDLQuit function not working

Hi this is my first attempt at messing around with open gl and SDL2.0 to do some graphics test programs that I plan to add music to when I get better at it.

Why is 

	if( e.type == SDL_QUIT )
					{
						quit = true;
					

	//Free resources and close SDL
	close();

not responding to kill the window when I click the x.

Thanks.

Entire code 

#include <SDL2/SDL.h>
#include <SDL2/SDL_opengl.h>
#include <GL/glu.h>
#include <GL/glut.h>
#include <stdio.h>
#include <string>

// -lSDL2 -lGLU -lglut -lGL

//Screen dimension constants
const int SCREEN_WIDTH = 640;
const int SCREEN_HEIGHT = 480;

//Starts …