JOYTemplate for Footer group ” ÿÿh�ÓX�[5¶k…òI”z ¶kÐ pÐhlÂìŠI” Y÷%Á³Ðz ¶kZ-–K¥Òi´Z-–Kâ Nä"Õ¦I…` ¶{x„ R< Nä"Õ¦I…` ¶{x„ R<Lï$ЦI”z ¶yx ULï$ЦI”z ¶xx ULï$ЦI”z ¶x ULï$ЦI”z ¶~x ULï$ЦI”z ¶}x ULï$ЦI”z ¶|x ULï$ЦI”z ¶sx ULï$ЦI”z ¶rx UModern €+¶¹+Yº²‚»»»»»"»›Ù¼»»KºÛº¹¼»í»[XÛ¹šš™:†Ñ©ª©˜Úº˜R¹½j–’¹‰ˆ¹™Ë}×[Y™qË«‹Ë»»»»ÝÝÝÝÝ"wD“d›9›r›£¹9š9ºšÌÜ»­îÛ›‰Ì·š›®Y–g»»»»»»»»»»»»»»»»»»»»»»»»»»»»»»»»»»»»»»»»»»»»»»»»Í»»»´Úº™»«Û»¨‰‰ˆ©š¨¸™™»—‹˜¸‰ëÉ«¬�»Û»»ºº½œÊ˜‰¸Ù©©½™Û«ÛÙ˜Œ€ x€Script 1: 0x„ R< ÈP˜ pVARIABLELISTERPROGRAMx€ x€Script 1: 0x„ R< È &KPage===å :(c)copyright1989byGeoffBuckeridgeð€ x€Script 1: 0x„ R< Ș ÈVARIABLELISTERPROGRAM(cont)x€ x€Script 1: 0x„ R< È &KPage===å :(c)copyright1989byGeoffBuckeridge€x€ x€Script 1: 0x„ R< È )Thepurposeofthisprogramistolistthenamesofallthevariables,usedin yourbasicprogram.Italsoprovidesacrossreferencetoallthelinenumbers  *wherethevariableshaveoccurred.Itsfullpotentialmightnotbeimmediately=obvioussoherearesomeusesitcanbeputto.   'Howmanytimeshaveyougotpartwaythroughdevelopingyourlatest100line  V?program,decidedthatyouneedanewvariable,andcan'tmakeupyourmind  whattocallit.Youcan'tusex%becauseyoualwaysusex%infor/nextloops. §�Z9$isoutofthequestionbecausethatstheoneyoualwaysuseinan�emergencyandthatwasemployedyesterday.  2Therewouldn'tbethisdilemaifyoualwayskeptanoteofthevariablesused /todate,andadescriptionoftheirfunction.Youdon't?Wellnevermind,I'm  surethatfewpeopledo.Theansweristodoaretrospectiveanalysisofyourlprogram,butthiscanbeaverytedioustask.   Theexercise,however,canbeextremelyrewardinginlotsofrespects.Itcan,îforexample,highlightsomeofthefollowingproblems.  ,a) � Variableswhichwereonlyinsertedtemporarilyandshouldhavebeenremoved.  ,b) � Aninconsistancyinthelabellingofvariables.e.g.Onevariablename maybefourletterslongwhenalltheotherstaketheforma5,g9,c2,etc.Thiswillnoteffecttheoperationoftheprogramjustitsreadability. q ,c) � ˆAninconsistancyinthetypesofvariable.e.g.Somecouldbe  Q&suffixedby%andothersnot,andyettheymightallcontainintegervalues.�Againnotadisaster,butnotprettyeither.  ,d) � Anewvariablehasbeenusedwhenanold,generalpurposeonecouldjhavebeenreused.   mVThesearejustafewgoodreasonstogothroughyourprogram,afterit's   written,andrationalisetheuseofvariables.SothisiswhereVARLISTcomesh€ x€Script 1: 0x„ R< ȶintoitsown,andit'squitesimpletouse.  %Onethingtonoteisthatthisprogramwillonlylistvariableswhicharetyped inlowercase.Itisalwaysbest,anyway,totypetheentireprograminlower =&case.ThatisexceptthosebitsbetweenquotesorinREMstatements.Then assoonasitislistedthebasickeywordsareconvertedtouppercaseleaving€therestjustasyoutypedit. UVARLIST,onlyworksonfilessavedinASCIIformat.Likeso: ²LOAD"MYPROG €SAVE"MYPROG",A ZThentypeSYSTEMtoreturntoCP/Mandattheprompttype: ‰VARLISTMYPROG  �Ø€ x€Script 1: 0x„ R< ȲAseachnewvariableisfounditisdisplayedonscreen.   ×ÀWhenalltheprogramhasbeenscannedthevariablesaresortedinto  >'alphanumericorder.Youcan,atthisstage,selectwhetheryouwanttosend  uJthelisttothevduorprinter,andchoosewhichoutputstyleyourequire.ÀTherearetwostyles,andyoucanpickeither,orboth.  L5Style1isacompletecrossreference.Itprintsalabelbylistingthevery  firstlineoftheprogram,usuallyaREMstatement.Thenfollowsthreecolumns %containingthevariablename,thenumberoftimesithasbeenusedandalltheElinenumbersonwhichitoccurred.  Style2startsinthesamefashionwithalabelthenfourcolumns.Thistimeit  6givesyouthevariablenameandthetotalnumberofoccurances.Butinstead oflistingallthelinenumbers,itonlyprovidesyouwiththefirstlineinwhich # thevariablewasused.ThelastcolumnjustproduceslinesonwhichtowriteÅdescriptions.   «”Nowifyougetintothehabbitoflistinganddocumentingyourprogram“variables,itwillmakelifeeasierwhenyouneedtorefertothemagain.