#include<dos.h>
#include  <graphics.h>
#include<iostream.h>
#include<conio.h>
void show(int i,float h, float v);
void erease(int i, float h, float v);
void planeshow(int i,int k);
void ereasep(int i, int k);
char read_key();
void main(void)
{
    int   driver = DETECT,mode;
    int   i,j=0,k,f=0;
    char  x;
    int a[100];

    for (i=0; i<=99; i++)
    a[i]=0;

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

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

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

	show(i, 5.0, 9.0);
	x=read_key();
	if (x =='u') f=f-8;
	if (x =='i') f=f+8;
	if(x == 'm') {j=j+1; a[j]=i;}
	setcolor(YELLOW);  planeshow(5*(i-8), f);
	for (k=0; k<=j; k++)
	if (a[k] != 0) show(i-a[k], 5.0+0.3*k, 10.0+0.1*j);
	delay (300);
	ereasep(5*i, 5); ereasep(5*(i-8), f);
	erease(i, 5.0, 9.0);
       erease(i-10, 10.0, 8.0);
       for(k=0; k<=j; k++)
	if (a[k] != 0) erease(i-a[k], 5.0+0.3*k, 10.0+0.1*j);

     }

    closegraph();
}
void show(int i, float h, float v)
{    int x, y;

    x=h*i;
    y=v*i-0.15*i*i;
    setcolor(RED);
    circle(400-x,400-y,2);

}
void erease(int i, float h, float v)
{
   int x, y;
    x=h*i;
    y=v*i-0.15*i*i;
   setcolor(BLACK);
   circle(400-x,400-y,2);
}
void 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 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()
{   int y=1;
    char x;
    _AH=0x01;
    geninterrupt(0x16);
     y=_FLAGS&0x40;

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