Rosetta Code

Category:XPL0: Difference between revisions

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Category:XPL0 (view source)

Revision as of 17:26, 7 December 2019

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XPL0 has been implemented on more than a dozen processors, but it's
currently maintained foron the Raspberry Pi and IBM-type PCs. Programs run under DOS and under versions ofLinux, Windows, that can still runand DOS apps. Free, open-source versions of the
compilers (interpreted, assembly-code compiled, and optimizing) are
available from the official website: xpl0.org [http://www.xpl0.org/]. The 32-bit version of the DOS compiler, XPLPX, was used for allmost of these Rosetta Code tasks, but more recent tasks were implemented using the compilers for the Raspberry Pi.
 
Here's how the traditional Hello World program is coded:
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All names must be declared before they can be used. The command word
''code'' associates the name Text to the built-in routine number 12, which
outputs strings. There are aboutover 80a hundred of these built-in routines that
provide capabilities such as input and output, graphics, and trig
functions.
 
The Raspberry Pi versions of the compilers (as well as the Windows' version, EXPL-32) automatically declare ''code'' declarations. Thus the above program can simply be written as:
 
<pre>
Text(0, "Hello World!")
</pre>
Loren
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