| 윈도우 프로그래밍 자료 |
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| 제목 | MFC에서, DATA Type Range 1998/06/08 (19:16) |
| 이름 | 김효원 |
| 번호 | 14 |
| 조회 | 326 |
| 본문 |
Data Type Ranges C/C++ recognizes the types shown in the table below. Type Bytes Other Names Range ---- ----- ----------- ----- int * signed, signed int System dependent unsigned int * unsigned System dependent __int8 1 char, signed char -128 to 127 __int16 2 short, short int, signed short int -32,768 to 32,767 __int32 4 signed, signed int -2,147,483,648 to 2,147,483,647 __int64 8 none -9,223,372,036,854,775,808 to 9,223,372,036,854,775,807 char 1 signed char -128 to 127 unsigned char 1 none 0 to 255 short 2 short int, signed short int -32,768 to 32,767 unsigned short 2 unsigned short int 0 to 65,535 long 4 long int, signed long int -2,147,483,648 to 2,147,483,647 unsigned long 4 unsigned long int 0 to 4,294,967,295 enum * none Same as int float 4 none 3.4E +/- 38 (7 digits) double 8 none 1.7E +/- 308 (15 digits) long double 10 none 1.2E +/- 4932 (19 digits) The long double data type (80-bit, 10-byte precision) is mapped directly to double (64-bit, 8- byte precision) in Windows NT and Windows 95. Signed and unsigned are modifiers that can be used with any integral type. The char type is signed by default, but you can specify /J to make it unsigned by default. The int and unsigned int types have the size of the system word. This is two bytes (the same as short and unsigned short) in MS-DOS and 16-bit versions of Windows, and 4 bytes in 32-bit operating systems. However, portable code should not depend on the size of int. Microsoft C/C++ also features support for sized integer types. See __int8, __int16, __int32, __int64 for more information. Also see Integer Limits |
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