1 files changed, 38 insertions, 0 deletions

diff --git a/3/3.c b/3/3.c
new file mode 100644
index 0000000..3921e02
--- /dev/null
+++ b/3/3.c
@@ -0,0 +1,38 @@
+#include <ctype.h>
+#include <stdio.h>
+
+#define MAXLEN 1000
+
+/* expands shorthand notation like a-z and 0-9 for ASCII charset */
+void expand(char s1[], char s2[]);
+
+int main(int argc, char *argv[]) {
+  int i;
+  char c, s1[MAXLEN], s2[MAXLEN];
+
+  for (i = 0; i < MAXLEN - 1 && (c = getchar()) != '\n' && c != EOF; i++)
+    s1[i] = c;
+  s1[i] = 0;
+
+  expand(s1, s2);
+  printf("%s\n", s2);
+
+  return 0;
+}
+
+void expand(char s1[], char s2[]) {
+  int i, j, c;
+
+  for (i = 0, j = 0; j < MAXLEN - 1 && (c = s1[i]) != 0; i++) {
+    if (c == '-' && i > 0 && isalnum(s1[i - 1]) && isalnum(s1[i + 1])) {
+      c = s1[i - 1] + 1;
+      while (c < s1[i + 1])
+        s2[j++] = c++;
+      continue;
+    }
+
+    s2[j++] = c;
+  }
+
+  s2[j] = 0;
+}
\ No newline at end of file