Add 1990/scjones/try.sh

The script allows one to more easily see (and verify) what the entry
does. This involves a temporary file that is created (and removed at the
end of the script but which has also been added to .gitignore).

1990/scjones/.gitignore

@@ -7,3 +7,4 @@ indent.o
 prog.orig
 scjones
 scjones.orig
+scjones.tmp.c

1990/scjones/README.md

@@ -12,6 +12,13 @@ make all
 ```
 
 
+## Try:
+
+```sh
+./try.sh
+```
+
+
 ## Judges' remarks:
 
 The addition of trigraphs has made it easier to make programs hard to read.  It

1990/scjones/try.sh

@@ -0,0 +1,35 @@
+#!/usr/bin/env bash
+#
+# try.sh - demonstrate IOCCC winner 1990/scjones
+#
+
+# 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 show scjones.c: "
+echo 1>&2
+less -rEXF scjones.c
+echo 1>&2
+
+read -r -n 1 -p "Press any key to run: ./scjones (space = next page, q = quit): "
+echo 1>&2
+./scjones | less -rEXF
+
+read -r -n 1 -p "Press any key to run: ./scjones > scjones.tmp.c: "
+echo 1>&2
+./scjones > scjones.tmp.c
+echo 1>&2
+
+read -r -n 1 -p "Press any key to compare scjones.c and scjones.tmp.c: "
+echo 1>&2
+diff -s scjones.c scjones.tmp.c
+rm scjones.tmp.c