if(argc==2)printf("The argument supplied is %s\n",argv[1]);
  else if(argc>2)printf("Too many arguments supplied.\n");
  else printf("One argument expected.\n");

  if (argc == 1) printf("\nYou should give an argument in the command line \n");
  else
    {choice = (int) *(argv[1]);
      printf ("ASCII %d\n",choice);
      if (choice>=49) printf ("\ninterpolating string lengths\n");
    }