Add 2020/otterness/try.sh

The .gitignore was updated but it cannot be sorted because it excludes
'*.mid' but then negates the .mid files in the repo, cvikl.mid and
entertainer.mid. These have to come after the exclusion of '*.mid'. This
is important as one might use the entry to create a .mid file that is
not done in the try script. The make clobber rule does not remove
'*.mid' files as doing so would remove the ones we want to keep.

2020/otterness/try.sh

@@ -0,0 +1,26 @@
+#!/usr/bin/env bash
+#
+# try.sh - demonstrate IOCCC winner 2020/otterness
+#
+
+# make sure CC is set so that when we do make CC="$CC" it isn't empty. Doing it
+# this way allows us to have the user specify a different compiler in an easy
+# way.
+[[ -z "$CC" || ! -f "$CC" || ! -x "$CC" ]] && CC="cc"
+
+make CC="$CC" all >/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 < cvikl.mid > output.mid: "
+echo 1>&2
+./prog < cvikl.mid > output.mid
+echo "Now play output.wav in an audio player that can play MIDI files." 1>&2
+echo 1>&2
+
+read -r -n 1 -p "Press any key to run: ./prog < entertainer.mid > output2.mid: "
+echo 1>&2
+./prog < entertainer.mid > output2.mid
+echo "Now play output2.wav in an audio player that can play MIDI files." 1>&2
+echo 1>&2