Delphi的数据类型(50分)

X

xx

Unregistered / Unconfirmed

GUEST, unregistred user!

• 1999-12-21

• #1

Delphi里有没有类似于unsigned short的数据类型？12位，范围：0-4095？
我有一文件，它是按unsigned short存储的数据（每个数据占2 bytes）。
还望大虾指教！

 

H

hubdog

Unregistered / Unconfirmed

GUEST, unregistred user!

• 1999-12-21

• #2

Integer -2147483648..2147483647 signed 32-bit
Cardinal 0..4294967295 unsigned 32-bit
Fundamental integer types include Shortint, Smallint, Longint, Int64, Byte, Word, and Longword.
Type Range Format
Shortint -128..127 signed 8-bit
Smallint -32768..32767 signed 16-bit
Longint -2147483648..2147483647 signed 32-bit
Int64 -2^63..2^63? signed 64-bit
Byte 0..255 unsigned 8-bit
Word 0..65535 unsigned 16-bit
Longword 0..4294967295 unsigned 32-bit
//word may be what you want

 

J

Jams

Unregistered / Unconfirmed

GUEST, unregistred user!

• 1999-12-21

• #3

No!No!

 

B

Beast

Unregistered / Unconfirmed

GUEST, unregistred user!

• 1999-12-22

• #4

hubdog真快，真全！
faint！

 

X

xx

Unregistered / Unconfirmed

GUEST, unregistred user!

• 1999-12-22

• #5

感谢hubdog！
可是可是我需要的数据是存成12位的哎，不是16位，虽然也是占2个字节。好象
高四位无效。所以当我想得到4095这个数时，用word类型得到的却是65535！
所以我想问一下，Delphi中有无数据类型直接存取12位的无符号短整数？
我该怎样解决这个问题？

 

K

kangxy

Unregistered / Unconfirmed

GUEST, unregistred user!

• 1999-12-22

• #6

用Char读取,自己在组合.BlockRead,

 

E

Energy

Unregistered / Unconfirmed

GUEST, unregistred user!

• 1999-12-22

• #7

a 是你的数据
转换
(a and $0FFF)

 

E

Energy

Unregistered / Unconfirmed

GUEST, unregistred user!

• 1999-12-22

• #8

如果有符号
a 是你的数据
转换
(a and $07FF) or ((a and $0800) shr 4)

 

K

kangxy

Unregistered / Unconfirmed

GUEST, unregistred user!

• 1999-12-22

• #9

读出的 a 本身就不对,FileLength div 16 <> FileLength div 12

 

X

xx

Unregistered / Unconfirmed

GUEST, unregistred user!

• 1999-12-22

• #10

多人接受答案了。