Glut Error: No rotation

Hello, I have finished my code for a simple rotation program in glut. The problem is this: the program does not rotate!!!! Could you please help me by looking over my code? Thanks!!!

Code:

#include <GL/glut.h>
#include <iostream>

void enable (void) {
    glEnable (GL_DEPTH_TEST); //enable the depth testing
    glEnable (GL_LIGHTING); //enable the lighting
    glEnable (GL_LIGHT0); //enable LIGHT0, our Diffuse Light
    glShadeModel (GL_SMOOTH); //set the shader to smooth shader
    }


void renderScene(void) {
   glClear(GL_COLOR_BUFFER_BIT);
   glBegin(GL_TRIANGLES);
   glColor3f(1,0,0);//Change the object color to red
      glVertex3f(-2.0,-0.1,0.0);
      glVertex3f(0.4,0.0,0.0);
      glVertex3f(0.0,0.0,0.0);
   glEnd();
   glFlush();
}


void keyboard (unsigned char key, int x, int y) {
    if (key==‘q’)
    {
    xrot += 1;
    if (xrot >360) xrot -= 360;
    }

    if (key==‘z’)
    {
    xrot -= 1;
    if (xrot < -360) xrot += 360;
    }

    if (key==‘w’)
    {
    float xrotrad, yrotrad;
    yrotrad = (yrot / 180 * 3.141592654f);
    xrotrad = (xrot / 180 * 3.141592654f);
    xpos += float(sin(yrotrad)) ;
    zpos -= float(cos(yrotrad)) ;
    ypos -= float(sin(xrotrad)) ;
    }

    if (key==‘s’)
    {
    float xrotrad, yrotrad;
    yrotrad = (yrot / 180 * 3.141592654f);
    xrotrad = (xrot / 180 * 3.141592654f);
    xpos -= float(sin(yrotrad));
    zpos += float(cos(yrotrad)) ;
    ypos += float(sin(xrotrad));
    }

    if (key==‘d’)
    {
    yrot += 1;
    if (yrot >360) yrot -= 360;
    }

    if (key==‘a’)
    {
    yrot -= 1;
    if (yrot < -360)yrot += 360;
    }
    if (key==27)
    {
    exit(0);
    }



int main(int argc, char **argv) {
   glutInit(&argc, argv);
   glutInitDisplayMode(GLUT_DEPTH | GLUT_SINGLE | GLUT_RGBA);
   glutInitWindowPosition(100,100);
   glutInitWindowSize(800,800);
   glutCreateWindow("MynDrawn: An Open Source Alternative to Minecraft");
   glutDisplayFunc(renderScene);
glutIdleFunc (display); //update any variables in display,
//display can be changed to anyhing, as long as you move the
variables to be updated, in this case, angle++;
glutReshapeFunc (reshape); //reshape the window accordingly
glutKeyboardFunc (keyboard); //check the keyboard
glutMainLoop (); //call the main loop
return 0;
}

Where's the rest of the code - say any code which USES xrot when calling Glut drawing functions.