Add 2018/bellard/try.sh

2018/bellard/README.md

@@ -17,18 +17,20 @@ code](#alternate-code) below.
 
 ## Try:
 
-```sh
-eog lena.ppm # On Linux
-open -a Preview lena.ppm # On macOS
+First open [Lenna.png](Lenna.png) in your graphics viewer of choice. Next, after
+running the above command (`./prog > lena.ppm`), open `lena.ppm` in your
+graphics viewer of choice.  After that try:
 
-pngtopam < Lenna.png | pnmscale 0.25 | cjpeg -arithmetic -dct float -quality 14 > small.jpg
+```sh
+./try.sh
 ```
 
-NOTE: `pngtopam(1)` (or `pngtopnm(1)` for older versions) and `pnmscale` come from
-the netpbm project and `cjpeg(1)` comes from `libjpeg-turbo`. If you don't have
-these tools already see [FAQ 3.15 - How do I compile and install netpbm for
-entries that require it?](/faq.md#netpbm) and [FAQ 3.16 - How do I compile and
-install libjpeg-turbo for entries that require it?](/faq.md#libjpeg).
+NOTE: the script uses the tools `pngtopam(1)` (or `pngtopnm(1)` for older
+versions) and `pnmscale` come from the netpbm project and `cjpeg(1)` comes from
+`libjpeg-turbo`. If you don't have these tools already see [FAQ 3.15 - How do I
+compile and install netpbm for entries that require it?](/faq.md#netpbm) and
+[FAQ 3.16 - How do I compile and install libjpeg-turbo for entries that require
+it?](/faq.md#libjpeg).
 
 NOTE: [Lenna.png](Lenna.png) is from
 <https://upload.wikimedia.org/wikipedia/en/7/7d/Lenna_%28test_image%29.png>.