#include<dos.h>
#include  <graphics.h>
#include<iostream.h>
#include<conio.h>
class Air{
public:
    int size;
    void planeshow(int i,int k);
    void ereasep(int i, int k);
    void shoot(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, 200+size+k, size);
    circle(i+3, 200+2*size+k, size);

    for (j=0; j<=4+3*size; j=j+size)
    circle(i+j, 200+k, size);

    circle(i+5, 200-size+k, size);
    circle(i+3, 200-2*size+k, size);
}
void Air::ereasep(int i, int k)
{
    int j;
     setcolor(BLACK);
     circle(i+5, 200+size+k, size);
     circle(i+3, 200+2*size+k, size);

    for (j=0; j<=4+3*size; j=j+1)
    circle(i+j, 200+k, size);

    circle(i+5, 200-size+k, size);
    circle(i+3, 200-2*size+k, size);

}
void  Air::shoot(int i, int k)
{int j; sound(700);
   for(j=0; j<=10; j++)
   {
   setcolor(RED); line(i+j*30, 200+k,i+j*30+18, 200+k );  delay (30);
   setcolor(BLACK);     line(i+j*30, 200+k,i+j*30+18, 200+k);
   }
   nosound();
}
class Shoot {
     public:
	     void point(int i, int k);
	     void sh(int i, int k);
};
void Shoot::point(int i, int k)
{
 setcolor(YELLOW);  circle(400+i, 400+k, 1);
}

void  Shoot::sh(int i, int k)
{int j; sound(900);
   for(j=0; j<=10; j++)
   {
   setcolor(RED);
   line(400-j*30+i, 400+k-30*j,400-j*30+i-10, 400+k-30*j-10);  delay (30);
   setcolor(BLACK);
   line(400-j*30+i, 400+k-30*j,400-j*30+i-10, 400+k-30*j-10);
   }
   nosound();
}
char read_key();
void main(void)
{
    int   driver = DETECT,mode;
    int   sf=0, i,k,f=0,f3=0, xi=0, yi=0;
    char  x;
    Air y1, y2, y3;
    Shoot bullet;



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

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

    for ( i = 0; i < 80; i++ )
     {
	 setcolor(BLUE); y1.size=2; 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.size=3; y2.planeshow(5*(i-8), f);

	setcolor(RED); y3.size=3;y3.planeshow(5*(i-16), f3);
	if(x=='k'){sf=1;  y2.shoot(5*(i-8), f);}
	bullet.point(xi,yi); if(x=='l') bullet.sh(xi,yi);
	if (sf==0) delay (300);
	else sf=0;
	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 '?';
}