Glut de mes deux lasted

#include <windows.h>
#include <GL/glu.h>
#include <GL/glut.h>
static int window;
static int menu_id;
static int submenu_id;
int value = 0;

void menu(int num){
  if(num == 0){
    glutDestroyWindow(window);
    exit(0);
  }else{
    value = num;
  }
  glutPostRedisplay();
}

void display(void){
    glClear(GL_COLOR_BUFFER_BIT);
}


void create_menu(void){ submenu_id = glutCreateMenu(menu);
    glutAddMenuEntry("Cercle", 2);
    glutAddMenuEntry("Segment", 3); menu_id = glutCreateMenu(menu);
    glutAddMenuEntry("Effacer", 1);
    glutAddSubMenu("Dessiner", submenu_id);
    glutAddMenuEntry("Quitter", 0);
    glutAttachMenu(GLUT_RIGHT_BUTTON);


}

int main(int argc, char **argv){
    glutInit(&argc, argv);
    glutInitDisplayMode(GLUT_RGBA | GLUT_SINGLE);
    glutInitWindowSize(500,500);
    glutInitWindowPosition(100,100);
    window = glutCreateWindow("Glut Menu");
    create_menu();
    glutDisplayFunc(display);
    glClearColor(0.0,0.0,0.0,0.0);
    glutMainLoop();


}