#include<graphics.h>
#include<iostream.h>
#include <alloc.h>
#include<conio.h>
#include<dos.h>
void main()
{
   int x1,y1,x2,y2,x3,y3,x4,y4,n,w,i,couset;
   int gd,gm,sign,nos;
   void *image;
   gd=DETECT;
  initgraph(&gd,&gm,"\\borlandc\\bgi");
  image=(void*)malloc(sizeof(image));
  cout<<"Enter the start and end of stair  : ";
  cin>>x1>>y1>>x2>>y2;
  cout<<"Enter the number of steps         : ";
  cin>>nos;
  cleardevice();
  w=(x2-x1)/nos+1;
  n=(y2-y1)/nos;
  //image//
  setcolor(10);
  circle(25,12,5);
  setfillstyle(1,10);
  fillellipse(25,12,5,5);
  line(25,25,20,30);
  line(25,25,30,30);
  line(25,37,20,42);
  line(25,37,30,42);
  line(25,17,25,37);

  getimage(5,5,45,45,image);
  cleardevice();
 // drawingsteps/
 x3=x1;y3=y1;
 for(i=1;i<nos;i++)
 {
  line(x3,y3,x3+w,y3);
  line(x3+w,y3,x3+w,y3-n);
  x3=x3+w;
  y3=y3-n;
 }
 line(x3,y3,x3+w,y3);
 //animating//
 x4=x1;
 y4=y1-42;
 sign=1;couset=0;
 while(!kbhit())
 {
  putimage(x4,y4,image,1);
  delay(250);
  putimage(x4,y4,image,1);
  x4=x4+w*sign;
  y4=y4-n*sign;
  couset++;
  if(couset==nos-1)
  {couset=0;
  sign=-sign;
  }
  delay(100);
  }
  closegraph();
  }