Langton's ant: Difference between revisions

Langton's ant (view source)

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→‎{{header|REXX}}: corrected a comment, changed the wording in the REXX section header. -- ~~~~

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Revision as of 21:53, 16 May 2013 (view source) rosettacode>Prsephton (→‎{{header\|Prolog}}) ← Older edit		Revision as of 22:20, 16 May 2013 (view source) rosettacode>Gerard Schildberger m (→‎{{header\|REXX}}: corrected a comment, changed the wording in the REXX section header. -- ~~~~) Newer edit →
Line 2,925: =={{header\|REXX}}== This REXX program automatically justifies (or ''crops'') the '''left''', ~~and~~'''right''', '''top''' ~~(to~~and ~~the~~'''bottom''' ~~screen)~~of the ant's walk field on the screen. <br>Or in other words, ~~the~~this REXX program only shows the pertinent part of the ant's walk-field. <lang rexx>/REXX program implements Langton's ant and displays the path it walked./ parse arg dir . /allow specification: ant facing/ /binary colors: 0=white, 1=black/ @.=0 /define stem array (all white)./ lb=1 ; rb=100 /* ~~right~~left boundry, right boundry./ bb=1 ; tb=100 /bottom " top " / x=(rb-lb)%2 ; y=(tb-bb)%2 /approximate center (walk start)*/