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+/* Searching and Sorting Example
+ Copyright (C) 1991-2017 Free Software Foundation, Inc.
+
+ This program is free software; you can redistribute it and/or
+ modify it under the terms of the GNU General Public License
+ as published by the Free Software Foundation; either version 2
+ of the License, or (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, if not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+
+/* Define an array of critters to sort. */
+
+struct critter
+ {
+ const char *name;
+ const char *species;
+ };
+
+struct critter muppets[] =
+ {
+ {"Kermit", "frog"},
+ {"Piggy", "pig"},
+ {"Gonzo", "whatever"},
+ {"Fozzie", "bear"},
+ {"Sam", "eagle"},
+ {"Robin", "frog"},
+ {"Animal", "animal"},
+ {"Camilla", "chicken"},
+ {"Sweetums", "monster"},
+ {"Dr. Strangepork", "pig"},
+ {"Link Hogthrob", "pig"},
+ {"Zoot", "human"},
+ {"Dr. Bunsen Honeydew", "human"},
+ {"Beaker", "human"},
+ {"Swedish Chef", "human"}
+ };
+
+int count = sizeof (muppets) / sizeof (struct critter);
+
+
+
+/* This is the comparison function used for sorting and searching. */
+
+int
+critter_cmp (const void *v1, const void *v2)
+{
+ const struct critter *c1 = v1;
+ const struct critter *c2 = v2;
+
+ return strcmp (c1->name, c2->name);
+}
+
+
+/* Print information about a critter. */
+
+void
+print_critter (const struct critter *c)
+{
+ printf ("%s, the %s\n", c->name, c->species);
+}
+
+
+/*@group*/
+/* Do the lookup into the sorted array. */
+
+void
+find_critter (const char *name)
+{
+ struct critter target, *result;
+ target.name = name;
+ result = bsearch (&target, muppets, count, sizeof (struct critter),
+ critter_cmp);
+ if (result)
+ print_critter (result);
+ else
+ printf ("Couldn't find %s.\n", name);
+}
+/*@end group*/
+
+/* Main program. */
+
+int
+main (void)
+{
+ int i;
+
+ for (i = 0; i < count; i++)
+ print_critter (&muppets[i]);
+ printf ("\n");
+
+ qsort (muppets, count, sizeof (struct critter), critter_cmp);
+
+ for (i = 0; i < count; i++)
+ print_critter (&muppets[i]);
+ printf ("\n");
+
+ find_critter ("Kermit");
+ find_critter ("Gonzo");
+ find_critter ("Janice");
+
+ return 0;
+}