C语言英文课件Chapter 10.ppt

《C语言英文课件Chapter 10.ppt》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。

1、chapter10STRUCTURESANDUNIONSAstructureisacollectionofoneormorevariables,possiblyofdifferenttypes,whicharetreatedasaunitinsteadofasseparateentities.10.1structuredefinition10.2structurevariablescitingandinitialization10.3structurearray10.4structurepointer10.5linkdispoing---applicationofstructure

2、pointer10.6unionandenumeration10.7typedef10.1STRUCTURETYPEANDDECLARATIONOFSTRUCTUREVARIABLESTHESTRUCTURETYPE,INCLANGUAGE，isthecounterpartas“record”inotheradvancedlanguage.一、questionemergingSTUDENTSCORESMANAGETABLECANOTDEALWITH2DARRAYSDIFFERENTTYEPES！1001ZhangXinM2087911002WangLiF2098961003Chen

3、FongM2186901004LiXiaopenM207786numnamesexagescore1score2二、structuretypedeclarationCommonusage：structstructuretypename{datatypemember1;datatypemember2;…………datatypemembern;};structstudent{intnum;charname[20];charsex;intage;floatscore1;floatscore2;};Typenamenumnamesexagescore1score2structstudent

4、demonstration：1、therulestoname“structuretypename”and“membername”,aresamewiththevariables’.2、thedefinitionsofvariablescanbeseperatedorinasamelineliketheinstancebeloweg.structdate{intyear,month,day;};3、thedefinitionsofvariablescouldbebasictypesoranotherstructuretypewhichhasbeendeclarated.eg.thet

5、ype”birthday”intheeg.Ofstructuretypestd_infoisadefinitedstructuretype--date三、STRUCTUREVARIABLESDECLARATIONStructuretype（userdefinition）Standarttype（systemdefinition）1、indirectdeclaration──firstdeclarethestructuretype,thenthestructurevariablesThesameusagestructstudent{intnum;charname[20];charse

6、x;intage;floatscore1;floatscore2;};structstudentstu1,stu2;numnamesexagescore1score2stu12、directdeclaration(1)definitethestructurevariable,whendefinitingthestructuretype；(2)definitethestructurevariabledirectly；(1)structstudent{intnum;charname[20];……floatscore2;}stu1,stu2;(2)struct{intnum;charna

7、me[20];……floatscore2;}stu1,stu2;3、demonstration(1)differstructuretypeandvariable,whicharecompletelydifferentconception,justastypeintandvariableofint(2)membernamesinstructure,maybesameasothervariablesinprogram,standfordifferentobjects[eg