Internal nested while loop wont execute - c++

Question

I'm trying to create a nested while-loop structure, which will create a 3 * 3 grid of cubes. It only appears to run the internal loop one time, creating an "L" shape out of cubes. So, my guess is that the internal while loop is not resetting after it runs the first time, but I do appear to be explicitly resetting it.
I'd rather not post the entire code, as some is code given by my TA, and it feels wrong to post that without their permission.
void display()
{
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glEnable(GL_DEPTH_TEST);
UpdateTransform();
int x = 0;
int y = 0;
float Xres = 0;
float Yres = 0;
while(x < 3)
{
glPushMatrix();
glTranslatef(Xres,0,0);
drawOneCube();
glPopMatrix();
Xres += 0.3;
while(y < 3)
{
glPushMatrix();
glTranslatef(0,Yres,0);
drawOneCube();
glPopMatrix();
Yres += 0.3;
y++;
}
y = 0;
Yres = 0;
x++;
}
glutSwapBuffers();//this prevents that problem where the window copies the contents behind the window, possibly with glClear at the top of this function
}

Answer 1

It looks like your logic is incorrect. You should only be calling the cube drawing function at one point, something like this:
void display()
{
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glEnable(GL_DEPTH_TEST);
UpdateTransform();
int x = 0;
int y = 0;
float Xres = 0;
float Yres = 0;
for (x = 0; x < 3; ++x)
{
Yres = 0;
for (y = 0; y < 3; ++y)
{
glPushMatrix();
glTranslatef(Xres,Yres,0);
drawOneCube();
glPopMatrix();
Yres += 0.3;
}
Xres += 0.3;
}
glutSwapBuffers();
}