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1994-02-17
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Now that you have read README.DOC and INSTALL.DOC, and you have installed
Euphoria, here are some things you can try:
* Run each of the demo programs in the demo directory. You just type ex
followed by the name of the .ex file to execute. e.g.
ex buzz
will run the file buzz.ex. (Depending on your graphics card you may have to
edit a line in some of the .ex files to select a different graphics mode.
Most demos will try to use SVGA modes).
You can also double-click on the .ex files from Windows. You will have
to associate .ex files with ex.exe. A few of the demos are really intended
to be run from the command line, but most will look ok from Windows.
* Play the language wars game (demo\langwar\lw.ex). Start at the
novice level. It will take you a while to get used to the commands and
the directions. Can you defeat C++?
* Generate some beautiful Mandelbrot pictures (demo\mset.ex). Zoom in on the
interesting parts. Each picture is saved in a file so you don't have to
start from scratch each time.
* Try to win at 3D TicTacToe. It can be done.
* Use the Euphoria editor, ed, to edit a .e or .ex file. Notice the
use of colors. What happens if you delete a character from a keyword?
What happens when you add an extra level of brackets to an expression?
Use Esc q Enter to quit the editor - Esc h Enter for help.
* Try the benchmarks in demo\bench. Do you get the same ratios as we did
in comparison with QBasic? If you have a C/C++ compiler, how much faster
can you get these benchmarks to run? We bet you'll be surprised,
especially when you consider that Euphoria runs the benchmarks with
subscript checking and a host of other run-time checks.
* Read the manual in doc\refman.doc. The simple expressive power of Euphoria
makes this manual much shorter than a C/C++ manual. C/C++ packages
require thousands of pages of documentation. WATCOM C/C++ has 57 different
routines for memory allocation, and 67 different routines for manipulating
strings and blocks of memory. How many of these routines does Euphoria need?
Answer: zero. In Euphoria, memory allocation happens automatically and
strings are manipulated just like any other sequences.
* Try running a Euphoria program with tracing turned on. Add:
with trace
trace(1)
at the beginning of any .ex file.
* Try running a Euphoria program with profiling turned on. You need
to say "with profile" at the start and "profile" at the end, after
execution. The result will be in ex.pro. Language Wars is interesting.
* Try the learn.ex program in demo\learn. You may have trouble with this
until you know more about Euphoria.
* Take a look at the programs in bin: walkdir, grep, lines, eprint, freq etc.
These should be run from a command line.
* Try modifying some of the demo programs.
First some simple modifications (takes less than a minute):
What if there were 100 C++ ships in Language Wars? What if sb.ex had to
move 1000 tiny balls instead of 50 big ones? Change some parameters in
polygon.ex. Can you get prettier pictures to appear? Add some funny
phrases to buzz.ex.
Then, some slightly harder ones (takes a few minutes):
Define a new function of x and y in plot3d.ex. Modify walkdir.ex to print
a list of all files on your hard disk that meet some criteria, e.g. size
is 0; year is greater than 1993.
Then some challenging ones (takes an hour or more):
Add your own customized new command to the editor. Set up your own
customized database by defining the fields in mydata.ex.
Then some really challenging research problems!
Add SVGA graphics to Language Wars. Try to write a smarter 3D TicTacToe
algorithm. Develop a faster sorting algorithm than any in allsorts.ex.
Implement a faster Mandelbrot algorithm.
* Try writing your own program in Euphoria. A program can be as simple as:
? 2+2
Remember that after any error you can simply type "ed" to jump into
the editor at the offending file and line.
You can immediately run a program that you are editing by typing
Esc e Enter in the editor. When the program is finished, hit Enter to
return to the editor.
Once you get used to it, you'll be developing programs much faster in
Euphoria than you could in BASIC, Fortran, Pascal, C/C++ or any other
language that we are aware of.