new files

Task/Search-a-list/C/search-a-list.c

@@ -0,0 +1,40 @@
+#include <stdio.h>
+#include <string.h>
+
+const char *haystack[] = {
+  "Zig", "Zag", "Wally", "Ronald", "Bush", "Krusty", "Charlie",
+  "Bush", "Boz", "Zag", NULL
+};
+
+int search_needle(const char *needle, const char **hs)
+{
+  int i = 0;
+  while( hs[i] != NULL ) {
+    if ( strcmp(hs[i], needle) == 0 ) return i;
+    i++;
+  }
+  return -1;
+}
+
+int search_last_needle(const char *needle, const char **hs)
+{
+  int i, last=0;
+  i = last = search_needle(needle, hs);
+  if ( last < 0 ) return -1;
+  while( hs[++i] != NULL ) {
+    if ( strcmp(needle, hs[i]) == 0 ) {
+      last = i;
+    }
+  }
+  return last;
+}
+
+int main()
+{
+  printf("Bush is at %d\n", search_needle("Bush", haystack));
+  if ( search_needle("Washington", haystack) == -1 )
+    printf("Washington is not in the haystack\n");
+  printf("First index for Zag: %d\n", search_needle("Zag", haystack));
+  printf("Last index for Zag: %d\n", search_last_needle("Zag", haystack));
+  return 0;
+}