Add 2018/ciura/try.alt.sh

This also fixes the missing reference to try.sh in the README.md file.

Using both scripts one can see the problem the alt code has that was
fixed by the author.

2018/ciura/README.md

@@ -19,8 +19,7 @@ below for more details.
 ## Try:
 
 ```sh
-./prog < Makefile
-./prog < README.md
+./try.sh
 ```
 
 
@@ -43,6 +42,16 @@ make alt
 Use `prog.alt` as you would `prog` above.
 
 
+### Alternate try:
+
+```sh
+./try.alt.sh
+```
+
+Do you spot the fix by running both [try.sh](try.sh) and
+[try.alt.sh](try.alt.sh)?
+
+
 ## Judges' remarks:
 
 This text was processed by `prog`. You may get confused.  We're not really sure:

2018/ciura/try.alt.sh

@@ -0,0 +1,27 @@
+#!/usr/bin/env bash
+#
+# try.alt.sh - demonstrate IOCCC winner 2018/ciura alt code
+#
+
+# make sure CC is set so that when we do make CC="$CC" it isn't empty. Doing it
+# this way allows us to have the user specify a different compiler in an easy
+# way.
+if [[ -z "$CC" ]]; then
+    CC="cc"
+fi
+
+make CC="$CC" alt >/dev/null || exit 1
+
+# clear screen after compilation so that only the entry is shown
+clear
+
+read -r -n 1 -p "Press any key to run: ./prog.alt < Makefile: "
+echo 1>&2
+./prog.alt < Makefile
+echo 1>&2
+
+read -r -n 1 -p "Press any key to run: ./prog.alt < README.md: "
+echo 1>&2
+./prog.alt < README.md
+
+exit 0