2-1 2-2 2-3 2-4

2-1

(Keywords) if if Delphi

anddowntoinorstringarrayelseinheritedoutthenasendinitializationpackedthreadvarasmexceptinlineproceduretobeginexportsinterfaceprogramtrycasefileispropertytypeclassfinalizationlabelraiseunitconstfinallylibraryrecorduntilconstructorformodrepeatusesdestructorfunctionnilresourcestringvardispinterfacegotonotsetwhiledivifobjectshlwithdoimplementationofshrxor

Directives Delphi

absolutedynamicmessageprivateresidentabstractexportnameprotectedsafecallassemblerexternalnearpublicstdcallautomatedfarnodefaultpublishedstoredcdeclforwardoverloadreadvarargscontainsimplementsoverride readonlyvirtualdefaultindexpackageregisterwritedeprecatedlibrarypascalreintroducewriteonlydispidlocalplatformrequires

(Identifier)(Package)Dephi

1.AZ_aablOut

ediIn-bb7eleven//+c//+=c//=2.a8bb255b2c3Age#3//c+3//c 3//

3.Delphi255

4.ScorescoreSCORE

5.iffor

6.StudentNumber AverageIncomexiak23erp

7.(_)StudentNumberStudent_NumberStu_Numstu_numStuNumstunumStuNum

2-2Delphi

Delphi 25$$1218

Ee100.00232.3E2.3e-3

TrueFalse

'a'//'Office XP'//Line1Line2'Line1'1310'Line2'

DelphiDelphi

DelphiSimpleStringStructuredPointerProceduralVariantsimpleordinalintegercharacterBooleanenumeratedsubrangerealstringstructured setarrayrecordfileclassclass referenceinterfacepointerproceduralvariant

SimpleSimpleSimpleOrdinalRealOrdinalIntegerCharacterBooleanEnumeratedSubrangeOrdinalOrdinal7-4

SubrangeSubrangeSubrangeTnumberTnumberRealInteger type Tnumber = 0..100;

RealDelphiReal*GenericFundamental

Real5.0*10-324..1.7*1030815~168 Bytes Real482.9*10-39..1.7*103811~126 BytesSingle1.5*10-45..3.4*10387~84 BytesDouble5.0*10-324..1.7*1030815~168 BytesExtended3.6*10-4951...1.1*10493219~2010 BytesComp-263+1..263-119~208 BytesCurency-922337203685477.5808..922337203685477.580719~208 Bytes

BooleanTrueFalseBooleanDelphi*

Enumerated Enumerated type12-3TmouseButton12-3a type TmouseButton = mbLeft, mbRight, mbMiddle;TmyColor type TmyColor =Red, Yellow, Green, White;

IntegerInteger*GenericFundamental

Ineger-2147483648~2147483647Signed 32 bisCardinal0~4294967295Unsigned 32 bisShorin-128~127Signed 8 bisSmallin-32768~32767Signed 16 bisLongin-2147483648~2147483647Signed 32 bisIn64-263~263-1Signed 64 biBye0~255Unsigned 8 biWord0~65535Unsigned 16 biLongWord0~4294967295Unsigned 32 bi

CharacerCharacer*GenericFundamenal

Char8 bisAnsiChar8 bisWideChar16 bis

SringDelphiSring*SringShorSringAnsiSring

varBasic student :=studend+1suden var suden : ineger ;sudendsudend

Delphivar 1[,2] : ;var i : Ineger ; j,k : Real ; a : Sring ; var i : Ineger = 10 ; a : Sring = 'Office XP';

ypecas := ;c1a2 c1 :='a'; a2 :=Inegerc1;INrunc7-1

Ineral153.14159Symbolic

conscons PI=3.141593.14159PI

const Rae 0.02Rae0.02varDelphiconst = M=3const M = 3

2-2bcons

sunum=15sunum=20

2-2c :1. abab2. FormCreaebcdFormCreaeabcd4bbb3. bnSarClickcabcabccFormCreaec

2-3OperaorOperandAssignmenArihmeicComparisonLogicalBiwiseSringUnaryBinary

AssociaiviyPrecedence

:= C++JavaVB =sum := a+b; a+bsum sum := 0a := 3b := 5; sum := a + b;08 8 := x ;8x x := 8 ;

(Arihmeic operaors)( - )( + )( + )( - )( * )( / )(div)(mod)

(Relaional operaors)rueFalseDelphi

=SimpleClassClass ReferenceInerfaceSringPacked SringBooleanX=3>SimpleClassClass ReferenceInerfaceSringPacked SringBooleanXYSimpleSringPacked SringPCharBooleanXSimpleSringPacked SringPCharBooleanY>2=SimpleSringPacked SringPCharBooleanX=SimpleSringPacked SringPCharBooleanY>=3

(Logical operaors)Delphi

noBooleanBoolean nox>3andAndBooleanBooleanx>3andy>2orOrBooleanBooleanx>3ory>2xorXORBooleanBooleanx>3xory>2

Sring operaor =>=

Delphishlshr

@, no1*, /, div, mod, and, shl, shr, as2+, -, or, xor3=, , , =, in, is4:=5

x+y*zx+y*zx>2 and y>3Delphix>2 and y>3

3-4Saemen()Delphi sum := sum + 1 ;

Block Saemen Compund Saemen begin...endend;begin t := a ; a := b ; b := t ;end;

Expression5+35+3i = 0 ; a = 3 ; b = 5 ;sum := 0 ;6 ; //64+5 ; //9sum > 3 ;//Falsei ; //0a + b ; //8sum := a + b ;//sum = 8

CommensDelphi x := x + 3; x3sum := sum + y; ysum* *//Delphisum := sum + y; //ysum