Whyis()funWhatdelightsmayitspractitionerexpectashisreward?Firstisthesheerjoyofmakingthings.Asthechilddelightsinhismudpie,sotheadultenjoysbuildingthings,especiallythingsofhisowndesign.Secondisthepleasureofmakingthingsthatareusefultootherpeople.Thirdisthefascinationoffashioningcomplexpuzzle-likeobjectsofinterlockingmovingpartsandwatchingthemworkinsubtlecycles,playingouttheconsequencesofprinciplesbuiltinfromthebeginning.Fourthisthejoyofalwayslearning,whichspringsfromthe(请作答此空)natureofthetask.Inonewayoranothertheproblemisevernew,anditssolverlearnssomething:sometimes(),sometimestheoretical,andsometimesboth.Finally,thereisthedelightofworkinginsuchatractablemedium.The(),likethepoet,worksonlyslightlyremovedfrompurethought-stuff.Fewmediaofcreationaresoflexible,soeasytopolishandrework,soreadilycapableofrealizinggrandconceptualstructures.Yettheprogram(),unlikethepoet'swords,isrealinthesensethatitmovesandworks,producingvisibleoutputsseparatefromtheconstructitself.Itprintsresults,drawspictures,producessounds,movesarms.Programmingthenisfunbecauseitgratifiescreativelongingsbuiltdeepwithinusanddelightssensibilitieswehaveincommonwithallmen.
A.repeating B.basic] C.non-repeating D.advance]正确答案C
