#include<stdio.h>
#include<conio.h>
#include<dos.h>

void main()
{
 int bootflag=0;
 char *err[]={"Abandoning control...","Error: Invalid Input\nPress a key to try again..."};
 char *bm[]={"Booting with DOS...","Booting with Windows...","Booting with DOS and transferring control to BC.BAT..."};
 char *text[]={"BootChoice by Shekhar A. Sherikar\n","*** MENU ***","1. Press F1 to Boot with DOS","2. Press F2 to Boot with WINDOWS","3. Press F3 to Boot with DOS & run commands in file BC.BAT","4. Press ESC to forcefully terminate this program"},ch;
 while(bootflag==0)
 {
  clrscr();
  puts(text[0]);
  puts(text[1]);
  puts(text[2]);
  puts(text[3]);
  puts(text[4]);
  puts(text[5]);
  printf("\nEnter your option: ");
  ch=getch();
  if(ch==27)
  {
   puts("ESC");
   puts(err[0]);
   exit(0);
  }
  if(ch==0)
   ch=getch();
  switch(ch)
  {
   case 59:puts("F1");
	   bootflag=1;
	   break;
   case 60:puts("F2");
	   bootflag=2;
	   break;
   case 61:puts("F3");
	   bootflag=3;
	   break;
   default:puts(err[1]);
	   getch();
	   bootflag=0;
	   break;
  }
 }
 switch(bootflag)
 {
  case 1:puts(bm[0]);
	 break;
  case 2:puts(bm[1]);
	 system("WIN");
	 break;
  case 3:puts(bm[2]);
	 system("BC.BAT");
	 break;
 }
}