Moving car

#include<dos.h>
#include<iostream.h>
#include<conio.h>
#include<graphics.h>
#include<stdlib.h>
#define PI 3.14159
void draw_wheel(int x,int y,int theta)
{
int incr=45;
setcolor(getmaxcolor());
setfillstyle(EMPTY_FILL,getmaxcolor());
for(double i=theta;i<theta+360.0;i+=2*incr)
{
sector(x,y,i,i+incr,20,20);
arc(x,y,i+incr,i+2*incr,20);
}
}
void draw_car(int ang)
{
int car_color=YELLOW;
draw_wheel(50,200,ang);
draw_wheel(200,200,ang);
setcolor(car_color);
line(0,80,639,80);
line(0,300,639,300);
line(25,200,0,200);
line(0,200,0,160);
line(0,160,40,160);
line(40,160,70,130);

line(70,130,170,130);
line(170,130,200,160);
line(200,160,260,160);
line(260,160,260,200);
line(260,200,225,200);
line(175,200,75,200);

arc(50,200,0,180,25);
arc(200,200,0,180,25);

setfillstyle(SOLID_FILL,car_color);
floodfill(150,170,car_color);
}
void main()
{
int gd,gm,i,j;
void *bitmap1,*bitmap2;
detectgraph(&gd,&gm);
initgraph(&gd,&gm,"C:\\TC\\BGI");
draw_car(0);
bitmap1=malloc(imagesize(0,130,270,230));
getimage(0,130,270,230,bitmap1);
putimage(0,130,bitmap1,XOR_PUT);
draw_car(22);
bitmap2=malloc(imagesize(0,130,270,230));
getimage(0,130,270,230,bitmap2);
putimage(0,130,bitmap2,XOR_PUT);
for(i=0;!kbhit();i+=10)
{
if(i>500)i=0;
putimage(i,130,bitmap1,OR_PUT);
delay(100);
putimage(i,130,bitmap1,XOR_PUT);
putimage(i+5,130,bitmap2,OR_PUT);
delay(50);
putimage(i+5,130,bitmap2,XOR_PUT);
}
closegraph();
}