Add 2005/persano/try.sh

2005/persano/.gitignore

@@ -8,3 +8,4 @@ indent.o
 persano
 persano.orig
 prog.orig
+seal.gif

2005/persano/README.md

@@ -18,10 +18,10 @@ setting binary mode on `stdout`. See [alternate code](#alternate-code) below.
 ## Try:
 
 ```sh
-./persano 3 16 > knot3-16.gif
+./try.sh
 ```
 
-Open the [GIF](https://en.wikipedia.org/wiki/GIF) file with a viewer capable of
+Open the [GIF](https://en.wikipedia.org/wiki/GIF) files with a viewer capable of
 displaying animated GIFs and watch closely at the bottom of the picture (you may
 need to use [gifsicle](https://www.lcdf.org/gifsicle/) - a great tool to
 manipulate animated GIFs - to slow down the animation and to compress the GIFs

2005/persano/try.sh

@@ -0,0 +1,45 @@
+#!/usr/bin/env bash
+#
+# try.sh - demonstrate IOCCC winner 2005/persano
+#
+
+# 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: ./persano 3 16 > knot3-16.gif: "
+echo 1>&2
+./persano 3 16 > knot3-16.gif
+echo 1>&2
+if [[ -f knot3-16.gif ]]; then
+    echo "Now open the file knot3-16.gif in a GIF viewer capable of viewing animated" 1>&2
+    echo "GIFs. See the README.md for details on a tool to manipulate it, if you wish." 1>&2
+fi
+
+read -r -n 1 -p "Press any key to run: ./persano 3 2 1 > foo.gif: "
+echo 1>&2
+./persano 3 2 1 > foo.gif
+echo 1>&2
+if [[ -f foo.gif ]]; then
+    echo "Now open the file foo.gif in a GIF viewer capable of viewing animated" 1>&2
+    echo "GIFs. See the README.md for details on a tool to manipulate it, if you wish." 1>&2
+fi
+
+read -r -n 1 -p "Press any key to run: ./persano 5 2 > seal.gif: "
+echo 1>&2
+./persano 5 2 > seal.gif
+echo 1>&2
+
+if [[ -f seal.gif ]]; then
+    echo "Now open seal.gif (Solomon's Seal knot) in a GIF viewer capable of viewing" 1>&2
+    echo "animated GIFs. See the README.md for details on a tool to manipulate it, if you wish." 1>&2
+fi