movement of the camera for DOLLY

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C++

C

I wanna to make a camera which is moving in some ways such as Dolly, pan, Tilt, Track and orbit

I have a code example too

#include <glut.h>
#include <conio.h>
//#include <iostream.h>
using namespace std;
GLfloat b=-0.5, a=0, C=0.04;
void display()
{
    glClear(GL_COLOR_BUFFER_BIT);
    glLoadIdentity();
    gluLookAt(.0, .0, .0, .0, .0, -1.0, .0, 1.0, .0);
    glTranslatef(.0, .0, -3.0);
    glutWireCube(1.0);
    glutSwapBuffers();
    //glflush();
}
void ifIDLE()
{
    a += .3;
    b = b + C;
    if (a >= 15.0)
    {
        C = -1.0 * C;
        a = 0.0;
    }
    //glTranslatef();
    //glutWireCube();
glutPostRedisplay();
}
void init()
{
    glClearColor(.0, .0, .0, .0);
    glColor3f(1.0, .4, .2);
    glMatrixMode(GL_PROJECTION);
    glLoadIdentity();
    glFrustum(-1.0, 1.0, -1.0, 1.0, 1.0, 10.0);
    //glFrustum(-1.0, 1.0,
    glMatrixMode(GL_MODELVIEW);
    glLoadIdentity();
}
int main(int argc,char** argv)
{
    glutInit(&argc, argv);
    glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB);
    glutInitWindowSize(500, 500);
    glutInitWindowPosition(0, 0);
    glutCreateWindow("perspective projection");
    glutIdleFunc(ifIDLE);
    //glutMainLoop();
    init();
    glutMainLoop();
    //cin>>C;
    return 0;
}

but I know it is not enough to have an app like the real one.
So any body has any idea about it:-?
Course I know I should make functions to have camera so help me on debugging;-)