Add 1998/df/try.sh

This script runs repeatedly until (when prompted) one hits 'q' (or 'Q')
or else sends ctrl-c/intr. I also added a question to the extra credit
questions: are there any misspelt words and if there are what are they?
I also added that there's a way to cheat very easily but I did not say
how to do it. It should be pretty obvious how to do it to anyone who
tries the program once or if not once a few times.

1998/df/README.md

@@ -11,6 +11,19 @@ make all
 ./df
 ```
 
+
+## Try:
+
+```sh
+./try.sh
+```
+
+This will run the program in a loop until you exit (`q` when prompted or
+ctrl-c/intr).
+
+Can you figure out a very simple pipeline to cheat?
+
+
 ## Judges' remarks;
 
 Everyone talks about how data hiding can produce clearer code; I am
@@ -33,6 +46,7 @@ Extra credit questions:
 - Where are the words stored?
 - How many words does this entry use?
 - Can you add more words to the program and still make it work?
+- Are there any misspelt words? If yes what are they?
 
 
 ## Author's remarks:

1998/df/try.sh

@@ -0,0 +1,25 @@
+#!/usr/bin/env bash
+# 
+# try.sh - demonstrate IOCCC winner 1998/df
+#
+
+# 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="$CC" all >/dev/null || exit 1
+
+# clear screen after compilation so that only the entry is shown
+clear
+
+while [[ 1 ]]; do
+    read -r -n 1 -p "Press any key to run ./df or 'q' to quit: "
+    echo 1>&2
+    if [[ "$REPLY" = "q" || "$REPLY" = "Q" ]]; then
+	exit 0
+    fi
+    ./df
+done

thanks-for-help.md

@@ -2269,10 +2269,14 @@ prior to each run.
 [Cody](#cody) changed a `int *` used for `fopen(3)` to be a `FILE *` to be more correct
 and prevent any possible problems in some systems (which has happened).
 
-Cody also made the fixed version look more like the original version by using
+Cody also made the fixed version to look more like the original version by using
 the old style of `main()` args so that it reads `i,love_unix` more naturally,
-and by changing the typedef `lint` (to `int` - see the code for why this has to
+and by changing the `typedef int lint` to be `typedef int _int`. See the code
-be done in modern systems) to be `_int`.
+for why this has to be done this way.
+
+Cody also added the [try.sh](/1998/df/try.sh) script which runs the program in a
+loop until one hits `q` (or `Q`) or sends intr/ctrl-c. He also proposed there's
+a way to cheat very easily. Can you figure out how?
 
 
 ## <a name="1998_dlowe"></a>[1998/dlowe](/1998/dlowe/dlowe.c) ([README.md](/1998/dlowe/README.md]))