classification | range | byte | Remark | |||
Simple type | Ordinal | Integer | Integer | -2147483648 .. 2147483647 | 4 | Signed 32 |
Cardinal | 0 .. 4294967295 | 4 | Unsigned 32-bit | |||
Shortint | -128 .. 127 | 1 | Signed 8 | |||
Smallint | -32768 .. 32767 | 2 | Signed 16 | |||
Longint | -2147483648 .. 2147483647 | 4 | Signed 32 | |||
Int64 | -263 .. 263 | 8 | Signed 64 | |||
Byte | 0 .. 255 | 1 | Unsigned 8 | |||
Word | 0 .. 65535 | 2 | Unsigned 16 | |||
Longword | 0 .. 4294967295 | 4 | Unsigned 32-bit | |||
character | AnsiChar (Char) | ANSI character set | 8th | |||
WideChar | Unicode character set | # 16 | ||||
Boolean | Boolean | False < True Ord(False) = 0 Ord(True) = 1 Succ(False) = True Pred(True) = False |
1 | |||
ByteBool | False <> True Ord(False) = 0 Ord(True) <> 0 Succ(False) = True Pred(False) = True |
1 | ||||
WordBool | 2 | |||||
LongBool | 4 | |||||
enumerate | ||||||
Child world | ||||||
Real | Real | 5.0×10-324 .. 1.7×10308 | 8 | [Accuracy] 15..16 | ||
Real48 | 2.9×10-39 .. 1.7×1038 | 6 | [The precision] 11..12; backward compatibility |
|||
Single | 1.5×10-45 .. 3.4×1038 | 4 | [Accuracy] 7..8 | |||
Double | 5.0×10-324 .. 1.7×10308 | 8 | [Accuracy] 15..16 | |||
Extended | 3.6×10-4951 .. 1.1×104932 | 10 | [Accuracy] 19..20 | |||
Comp | -263 + 1 .. 263 - 1 | 8 | [Accuracy] 19..20 | |||
Currency | -922337203685477.5808 .. 922337203685477.5807 |
8 | [精度]19..20 | |||
字符串 | ShortString | 255个字符 | 2..256B | 向后兼容 | ||
AnsiString | 大约 231 个字符 | 4B..2GB | 8位(ANSI)字符 | |||
WideString | 大约 230 个字符 | 4B..2GB | 多用户服务和 多语言应用程序; 和com定义的BSTR兼容 |
|||
其他 | String String[0..255] PChar PAnsiString PWideString |
|||||
结构类型 | 集合 | Set | 最多256个元素[0..255] | |||
数组 | 静态数组 | |||||
动态数组 | ||||||
记录 | Record | |||||
文件 | File | |||||
类 | Class | |||||
类引用 | Class reference | |||||
接口 | Interface | |||||
指针类型 | 无类型指针 | Pointer | ||||
有类型指针 | 预定义类型指针 | PAnsiString PString PByteArray PCurrency PDouble PExtended PSingle PInteger POleVariant PShortString PTextBuf PVarRec PVariant PWideString PWordArray |
||||
过程类型 | 程序过程类型 | Procedural | ||||
对象过程类型 | Procedural | |||||
变体类型 | Variant | |||||
OleVariant |
Delphi basic data type (built-in data types)
Guess you like
Origin blog.csdn.net/jason156/article/details/90649554
Recommended
Ranking