Add 1990/dg/try.sh

It runs the program with a couple strings and then it feeds the source
code to the program (piped to less) as well (after showing the source
code with less).

1990/dg/try.sh

@@ -0,0 +1,38 @@
+#!/usr/bin/env bash
+#
+# try.sh - demonstrate IOCCC winner 1990/dg
+#
+
+# 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="$CC" all >/dev/null || exit 1
+
+# clear screen after compilation so that only the entry is shown
+clear
+
+
+read -r -n 1 -p "Press any key to run: echo 'to C or not to C' | ./dg: "
+echo 1>&2
+echo 'to C or not to C' | ./dg
+echo 1>&2
+
+echo "$ echo 'The quick brown fox jumps over the lazy dog' | ./dg" 1>&2
+read -r -n 1 -p "Press any key to continue: "
+echo 1>&2
+echo 'The quick brown fox jumps over the lazy dog' | ./dg
+echo 1>&2
+
+read -r -n 1 -p "Press any key to show dg.c (space = next page, q = quit): "
+echo 1>&2
+less -rEXF dg.c
+echo 1>&2
+
+read -r -n 1 -p "Press any key to run: ./dg < dg.c (space = next page, q = quit): "
+echo 1>&2
+./dg < dg.c | less -rEXF
+echo 1>&2