Problem with Camera ?

This is my code :


#include <GL\glut.h>
#include <stdlib.h>
#include <iostream.h>
#include <math.h>
void Init();
void Display();
void Reshape(int Width,int Height);
void Keyboard(unsigned char Key,int X,int Y);
void time(int value);


// Viewer
float x = 1.0,y=3.0,z=20.0;
float lx = 0.0, ly = 0.0,lz = 0.0;
float angle=0.0,deltaAngle = 0.0;
int deltaMove = 0;



void orientMe(float ang) {


	lx = sin(ang);
	lz = -cos(ang);
	glLoadIdentity();
	gluLookAt(x, y, z, 
		      x + lx,y + ly,z + lz,
			  0.0f,1.0f,0.0f);
}


void moveMeFlat(int i) {
	x = x + i*(lx)*0.1;
	z = z + i*(lz)*0.1;
	glLoadIdentity();
	gluLookAt(x, y, z, 
		      x + lx,y + ly,z + lz,
			  0.0f,1.0f,0.0f);
}



void pressKey(int key, int x, int y) {

	switch (key) {
		case GLUT_KEY_LEFT : 
			deltaAngle = -0.01f;break;
		case GLUT_KEY_RIGHT : 
			deltaAngle = 0.01f;break;
		case GLUT_KEY_UP : 
			deltaMove = 1;break;
		case GLUT_KEY_DOWN : 
			deltaMove = -1;break;
	}
}

void releaseKey(int key, int x, int y) {

	switch (key) {
		case GLUT_KEY_LEFT : 
		case GLUT_KEY_RIGHT : 
			deltaAngle = 0.0f;break;
		case GLUT_KEY_UP : 
		case GLUT_KEY_DOWN : 
			deltaMove = 0;break;
	}
}


void setPosViewer()
{
	if (deltaMove)
		moveMeFlat(deltaMove);
	if (deltaAngle) {
		angle += deltaAngle;
		orientMe(angle);
	}

}
void main(int Argc,char** Argv)
{
	glutInit(&Argc,Argv);
	glutInitDisplayMode(GLUT_DOUBLE| GLUT_RGB);
	glutInitWindowSize(500,500);
	glutInitWindowPosition(300,200);
	glutCreateWindow("Camera Lesson");
	Init();

	glutDisplayFunc(Display);
	glutReshapeFunc(Reshape);

	glutIgnoreKeyRepeat(1);
	glutSpecialFunc(pressKey);
	glutSpecialUpFunc(releaseKey);

	glutMainLoop();
	
	
}
 
void Init()
{
	glClearColor(0.0,0.0,0.0,0.0);
}
void Display()
{
	setPosViewer();
	
	glClearColor(0.0,0.0,0.0,0.0);
	glClear (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

	glutWireCube(3);

	glutSwapBuffers();

}
void Reshape(int Width,int Height)
{
	glViewport(0,0,(GLsizei)Width,(GLsizei)Height);
	glMatrixMode(GL_MODELVIEW);
	glLoadIdentity();
	
	gluPerspective(30,1.0,1.0,51.0);
	gluLookAt(x,y,z,lx,ly,lz,0.0,1.0,0.0);
	
				
		
}

 

It don’t work well.
I set camery at x,y,z
And I draw a obj ( Cube )
Then I control arrow key to change camera position and loking at point.

What’s my error ?