#include <stdio.h>
#include <conio.h>
#include <graphics.h>
main()
{
 int gd=DETECT;
 int gm=DETECT;
 int b,k=1,c,d=0;
 detectgraph(&gm, &gd);
 initgraph(&gm,&gd,"c:\\tc\\bgi");
 cleardevice();
 /*program*/
 start();
 printf("\n\n\t\t\t  Enter any Binary number : ");
 block();
 scanf("%d",&b);
 while(b>0)
 {
  c=b%10;
  d=d+(c*k);
  k=k*2;
  b=b/10;
  if(c<0||c>1)
  {
   printf("\n\n\n\n\t\t\t\t INVALID INPUT !");
   printf("\n\n\n\t\t\t      CANNOT ACCEPT INPUT");
   printf("\n\n\t\t\t ENTERED NUMBER IS NOT BINARY !");
   block();
   getch();
   exit();
  }
 }
 printf("\n\n\t\t\t     Binary equivalent : %d   ",d);
 block();
 getch();
}
start()
{
 int i,j;
 for(i=0;i<480;i++)
 {
  for(j=0;j<640;j++)
  {
   putpixel(j,i,BLUE);
  }
 }
}
block()
{
 int i,j;
 for(i=20;i<480;i++)
 {
  for(j=0;j<200;j++)
  {
   putpixel(j,i,BLUE);
  }
 }
}