/*  anum.c  --  take stream of characters off stdin and put the
                corresponding stream of ascii codes in decimal
                to stdout according to the formula  n - base
    Usage:   numa [base]

             If "base" is not specified on the command line, it defaults
             to BASE.
                                                                           */

#define BASE     0
#define MAXC   255                        /*  max ascii code               */
#define ASCLF   10
#include <stdio.h>
#include <stdlib.h>
main(argc,argv)
int argc;
char **argv;
{
int base, chx, num, onum, pchx;
if( (argc != 1) && (argc !=2) )
   {
   printf("  %s: One optional argument \"base\" -- defaults to %d.\n",
           argv[0], BASE);
   exit(20);
   }
base = BASE;
if(argc==2)
   {
   base = atoi(argv[1]);
   if(base < 0)
      {
      printf("  %s: Argument \"base\" cannot be negative.\n", argv[0]);
      exit(21);
      }
   if(base > MAXC)
      {
      printf("  %s: Argument \"base\" may not exceed %d.\n", argv[0], MAXC);
      exit(22);
      }
   }
num = 0;
pchx = 0;
while( (chx=getc(stdin)) != EOF )
   {
   num = chx - base;
   if(num < 0)
      {
      fprintf(stderr,"\n %s:  Code for -- %c (hex %x) < 0.\n",argv[0],chx,chx);
      exit(1);
      }
   if(pchx == 0)
      {
      printf("%d", num);
      }
   else
      {
      printf(" %d", num);
      }
   pchx = 1;
   }
putchar('\n');
exit(0);
}