#include<dos.h>
#include  <graphics.h>
#include<iostream.h>
#include<conio.h>
class Air{
public:

    void planeshow(int i,int k);
    void ereasep(int i, int k);
    /*i decides the herizontal position */
    /* k decides the vertical position */
};
void Air::planeshow(int i,int k)
{
    int j;

    circle(i+5, 202+k, 2);
    circle(i+3, 204+k, 2);

    for (j=0; j<=8; j++)
    circle(i+j, 200+k, 2);

    circle(i+5, 198+k, 2);
    circle(i+3, 196+k, 2);
}
void Air::ereasep(int i, int k)
{
    int j;
     setcolor(BLACK);
    circle(i+5, 202+k, 2);
    circle(i+3, 204+k, 2);

    for (j=0; j<=8; j++)
    circle(i+j, 200+k, 2);

    circle(i+5, 198+k, 2);
    circle(i+3, 196+k, 2);
}


char read_key();
void main(void)
{
    int   driver = DETECT,mode;
    int   i,iiiiik,f=0,f3=0;
    char  x;
    Air y1, y2, y3;



    initgraph(&driver,&mode,"a:\\bgi");

      setcolor(WHITE);
      line(1,400,400,400);

    for ( i = 0; i < 80; i++ )
     {
	 setcolor(BLUE);  y1.planeshow(5*i, 5);


	x=read_key();
	if (x =='u') f=f-8;
	if (x =='i') f=f+8;
	if (x=='o') f3=f3-8;
	if (x=='p') f3=f3+8;

	setcolor(YELLOW);  y2.planeshow(5*(i-8), f);
	setcolor(RED); y3.planeshow(5*(i-16), f3);
	delay (300);
	y1.ereasep(5*i, 5); y2.ereasep(5*(i-8), f);
	y3.ereasep(5*(i-16), f3);

     }

    closegraph();
}

char read_key()
{   int y=1;
    char x;
    _AH=0x01;
    geninterrupt(0x16);
     y=_FLAGS&0x40;

     if(y == 0)
     {
       _AH=0x00;
       geninterrupt(0x16);
       x=_AL;
       return x;  }
       return '?';
}