hash-map-5.c

#include <stdio.h>
#include <string.h>

int get_number (const char *name)  /* nicht mehr geschummelt, O(1), aber:               */
{                                  /*  - Speicher-ineffizient                           */
  static const int n[26] =         /* :] vollständig: "sechs" != "sieben", aber unschön */
    {                              /* :) zuverlässig: "egon" != "eins"                  */
       8, /* a */
      -1, /* b */
      -1, /* c */
       3, /* d */
       1, /* e */
       5, /* f */
      -1, /* g */
      -1, /* h */
      -1, /* i */
      -1, /* j */
      -1, /* k */
      -1, /* l */
      -1, /* m */
       0, /* n */
      -1, /* o */
      -1, /* p */
      -1, /* q */
      -1, /* r */
       6, /* s */
      -1, /* t */
      -1, /* u */
       4, /* v */
      -1, /* w */
      -1, /* x */
      -1, /* y */
       2  /* z */
    };
  static const char *check[26] =
    {
       "acht",
       NULL, /* b */
       NULL, /* c */
       "drei",
       "eins",
       "fünf",
       NULL, /* g */
       NULL, /* h */
       NULL, /* i */
       NULL, /* j */
       NULL, /* k */
       NULL, /* l */
       NULL, /* m */
       "null",
       NULL, /* o */
       NULL, /* p */
       NULL, /* q */
       NULL, /* r */
       "sechs",
       NULL, /* t */
       NULL, /* u */
       "vier",
       NULL, /* w */
       NULL, /* x */
       NULL, /* y */
       "zwei"
    };
  int value = -1;
  if (name && name[0] >= 'a' && name[0] <= 'z')
    {
      if (name[0] == 's' && !strcmp (name, "sieben"))
        value = 7;
      else
        {
          int i = name[0] - 'a';
          if (!strcmp (name, check[i]))
            value = n[i];
        }
    }
  return value;
}

int main (void)
{
  int eins = get_number ("eins");
  int zwei = get_number ("zwei");
  int drei = get_number ("drei");
  int vier = get_number ("vier");
  int fuenf = get_number ("fünf");
  int sechs = get_number ("sechs");
  int sieben = get_number ("sieben");
  printf ("%d %d %d %d %d %d %d\n", eins, zwei, drei, vier, fuenf, sechs, sieben);
  return 0;
}