Add 1998/chaos/try.sh

The script runs the program on each data file, explaining how to use the
program, things to try and how to quit the program and how to terminate
the script prematurely.

1998/chaos/try.sh

@@ -0,0 +1,35 @@
+#!/usr/bin/env bash
+# 
+# try.sh - demonstrate IOCCC winner 1998/chaos
+#
+
+# 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" all >/dev/null || exit 1
+
+# clear screen after compilation so that only the entry is shown
+clear
+
+show_instructions()
+{
+    echo 1>&2
+    echo "Try the keys 'y', 'u', 'i', 'h', 'j' and 'k'; 'a' and 'z' zoom in and out." 1>&2
+    echo "When tired of moving it manually wait a short bit and watch what happens. You" 1>&2
+    echo "might try zooming in and out and then wait for it to start moving (again or" 1>&2
+    echo "initially). You can interrupt the automatic movement by pressing any key or 'q' to" 1>&2
+    echo "quit. Send intr/ctrl-c to quit the script prematurely." 1>&2
+    echo 1>&2
+}
+
+for f in cube.data desk.data ioccc.data pyramid.data xwing.data; do
+    clear
+    show_instructions
+    read -r -n 1 -p "Press any key to run: ./chaos $f: "
+    echo 1>&2
+    ./chaos "$f"
+done