Add 1989/ovdluhe/try.sh and fix Makefile

The try.sh script runs the program on the source file, the README.md and
the Makefile in a loop that runs four times. It has one loop so that
there is a better chance that it won't show the same output on the same
file more than once though it's certainly possible that it will.

The optimiser had been left disabled by accident and this has been
restored.

1989/ovdluhe/Makefile

@@ -68,7 +68,7 @@ CINCLUDE=
 
 # Optimization
 #
-OPT=
+OPT= -O3
 
 # Default flags for ANSI C compilation
 #

1989/ovdluhe/README.md

@@ -22,11 +22,7 @@ by chance or is killed.
 ### Try:
 
 ```sh
-./ovdluhe < ./ovdluhe.c
-./ovdluhe < ./ovdluhe.c
-
-./ovdluhe < README.md
-./ovdluhe < README.md
+./try.sh ; sleep 2 ; ./try.sh
 ```
 
 

1989/ovdluhe/try.sh

@@ -0,0 +1,34 @@
+#!/usr/bin/env bash
+#
+# try.sh - demonstrate IOCCC winner 1989/ovdluhe
+#
+
+# 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
+
+i=0
+for ((i=0; i<4; ++i)); do
+    read -r -n 1 -p "Press any key to run: ./ovdluhe < ovdluhe.c: "
+    echo 1>&2
+    ./ovdluhe < ovdluhe.c
+    echo 1>&2
+
+    read -r -n 1 -p "Press any key to run: ./ovdluhe < README.md: "
+    echo 1>&2
+    ./ovdluhe < README.md
+    echo 1>&2
+
+    read -r -n 1 -p "Press any key to run: ./ovdluhe < Makefile: "
+    echo 1>&2
+    ./ovdluhe < Makefile
+    echo 1>&2
+done

thanks-for-help.md

@@ -744,6 +744,12 @@ and over again, flooding the screen. The problem is that there was a `for` loop
 that by necessity had to not have an increment stage but only in the `if` path
 (in the loop itself) did the pointer get updated.
 
+Cody also provided the [try.sh](/1989/ovdluhe/try.sh) script which runs the
+program four times on three files to show the different output. It doesn't run
+the program on each file four times in a row but rather does it on each file
+and starts over, doing it four times, to help with hopefully allowing different
+output.
+
 Cody also provided an [alternate version](/1989/ovdluhe/ovdluhe.alt.c) based on the
 author's remarks. See the README.md for details. The fix described above was
 fixed in this version too, after it was discovered and fixed.