Delphi Êý¾ÝÀàÐÍ
Ò»¡¢ÕûÊýÀàÐÍ
ÀàÐÍ ËùÕ¼×Ö½ÚÊý È¡Öµ·¶Î§
byte 1 0-255
word 2 0-65535
shortint 1 -128-127
smallint 2 -32768-32767
integer 4 -214748648-214748467
longint 4 -214748648-214748467
cordinal 4 0-2147483647
¶þ¡¢ÊµÊýÀàÐÍ
ÀàÐÍ Ëùµã×Ö½ÚÊý È¡Öµ·¶Î§
Real 6 ±2.9×10µÄ¸º39´Î·½µ½1.7×10µÄ38´Î·½
Single 4 ±1.1×10µÄ¸º45´Î·½µ½1.1×10µÄ38´Î·½
double 8 ±5.0×10µÄ¸º324´Î·½µ½1.7×10µÄ308´Î·½
extended 10 ±3.4×10µÄ¸º4932´Î·½µ½1.1×10µÄ4932´Î·½
Comp 8 -263-262
Èý¡¢×Ö·ûÀàÐÍ
×Ö·ûÀà Ëùµã×Ö½ÚÊý ÈÝÄÉ×Ö·û·¶Î§
ansichar 1 Ò»¸öASCii×Ö·û
widechar 2 Ò»¸öµ¥´úÂë×Ö·û
Char 1 Ò»¸öASCII×Ö·û
ËÄ¡¢×Ö·û´®ÀàÐÍ
ÀàÐÍ ÈÝÄÉÀàÐÍ ÊÇ·ñÒÔ¿Õ×Ö½Ú½áÊø ³¤¶È·¶Î§
shortstring Char ·ñ 255
ansistring Char ÔÊÐí Ô¼3GB
string Char ²»ÏÞ 255»ò3GB
widestring widechar ÔÊÐí Ô¼1.5GB
Îå¡¢²¼¶ûÀàÐÍ
ÀàÐÍ ·¶Î§ Ëùµã×Ö½ÚÊý
bool ×Ö 2
boolean Ò»×Ö½Ú 1
bytebool ×Ö½Ú 1
wordbool ×Ö 2
longbool Ë«×Ö½Ú 4
Ïêϸ°æ£º
(1) »ù±¾Êý¾ÝÀàÐÍ£º
a¡¢ ÕûÊýÀàÐÍ£º (ͨÓÃÀàÐÍ<32λ>£ºInteger£ÓзûºÅ£»Cardinal£ÎÞ·ûºÅ)
¾ßÌ壺
ÓзûºÅ£ºShortint<8λ>£¬Smallint<16λ>£¬Longint<32λ >
ÎÞ·ûºÅ£ºByte<8λ>£¬Word<16λ>£¬LongiWord<32λ >
b¡¢×Ö·ûÀàÐÍ£º (ͨÓÃÀàÐÍ<8λ>£ºChar £ÓëAnsiCharµÈͬ)
¾ßÌ壺
AnsiChar<8λ> £ºÖ÷Òª´æ·ÅAnsi×Ö·û
WideChar<16λ>£ºÖ÷Òª´æ·ÅUnicode×Ö·û
c¡¢²¼¶ûÀàÐÍ£º (ͨÓÃÀàÐÍ<8λ>£ºBoolean£ÓëByteBoolµÈÍ
Ïà¹ØÎĵµ£º
1.±»×°ÊÎÕß
{¡¶HeadFirstÉè¼Æģʽ¡·Ö®×°ÊÎģʽ }
{ ±¾µ¥ÔªÖеÄÀàΪ±»×°ÊÎÕß }
{ ±àÒ빤¾ß: Delphi7.0 }
{ E-Mail : xshlife@163.com }
unit uComponent;
interface
type
TBeverage = class(TObject) //³éÏóÒûÁÏÀà
protected
FDescription: String;
public
......
1. ¸´ÔÓµÄ×Óϵͳ
unit uSubObject;
interface
type
{ TAmplifierÓëTTuner£¬TCDPlayer£¬TDVDPlayerÏ໥ÒÀÀµ¡£ }
{ ÔÚTTunerµÈµÄ¼òµ¥ÊµÏÖʱÓò»µ½¶ÔTAmplifierµÄÒýÓ㬠}
{ µ«ÏÖʵÉú»îÖоÍÓ¦¸ÃÈÃTAmplifierÌṩ·þÎñ£¬ËùÒÔÕâÀï±£ÁôÁË¡£ }
{ TProjector¶ÔT ......
ÃüÁîģʽ¿ÉÒÔºÜÇáËɵÄʵÏÖ³·Ïú£¨Undo£©¹¦ÄÜ¡£
1. ÃüÁîµÄ½ÓÊÜÕß
unit uReceiveObject;
interface
type
TLight = class(TObject)
public
procedure Open;
procedure Off;
end;
implementation
{ TLight }
procedure TLight.Off;
begin
Writeln('Light is off.');
......
Ò»¡¢ÔÚDelphi7ÖÐÁ¬½ÓMS SQL Server 2000µÄ·½·¨¡£
¸Õ¿ªÊ¼Ê±½çÃæÈçÏ£ºÌí¼Ó4¸ö¿Ø¼þ¡£
ÉèÖÿؼþÊôÐÔ¹ý³Ì£º
1¡¢ADOConnection1ÉèÖÃ
1£©Ë«»÷ADOConnection1£¬½øÐÐÉèÖÃÁ¬½Ó×Ö·û´®£¨×÷ÓÃÊÇ£ºÑ¡È¡Á¬½ÓÇý¶¯·½Ê½ºÍÁ¬½ÓµÄÊý¾Ý¿âÉèÖã©¡£¹ý³ÌÈçÏÂͼËùʾ£º
2¡¢ADOQuery1ÉèÖãº
1£©ADOQuery1.connectionÊôÐÔΪADOConnection1; ......
Ò»¡¢Òý×Ó£º
ÏÖÔÚµÄWindowsÓ¦ÓóÌÐò¼¸ºõ¶¼Ê¹ÓÃͼ±ê¡¢Í¼Æ¬¡¢¹â±ê¡¢ÉùÒôµÈ£¬ÎÒÃdzÆËüÃÇΪ×ÊÔ´£¨Resource£©¡£×î¼òµ¥µÄʹÓÃ×ÊÔ´µÄ°ì·¨ÊÇ°ÑÕâЩ×ÊÔ´µÄÔ´Îļþ´òÈëÈí¼þ°ü£¬ÒÔ·½±ã³ÌÐòÐèÒªµÄʱºòµ÷Óá£×ÊÔ´ÊdzÌÐòµÄÒ»²¿·Ö£¬³ÌÐòÒªÕý³£ÔËÐоÍÀë²»ÁË×ÊÔ´Îļþ¡£µ«ÊÇËüÊDz»¿ÉÖ´ÐдúÂë¡£
ΪÁ˸üºÃµØ¹ÜÀí×ÊÔ´£¬DelphiÖÐÌṩÁËÒ»ÖÖ.RESÀàÐ ......