while (open(MYFILE, "$filename") == 0) 
{ 
 printf("Cannot open file for reading");
 printf("\n\nDo you wish to enter a new file?: ");
 $choice = <>;

 if ($choice eq "no")
 {
  die("Program ending");
 }
 
 if ($choice eq "yes")
 {
  print("Enter the name of the file you wish to print: ");
  $filename = <>;
 }
}