byte는 1byte 의 크기를 갖으며 -128~127 까지의 값을 갖습니다.
short는 2byte의 크기를 갖으며 -32,768~32767 까지의 값을 갖고,
int는 4byte의 크기와 -2,147,483,648~2,147,483,647 까지의 값을 갖으며,
long은 8byte의 크기와 -9,223,372,036,854,775,808L ~9,223,372,036,854,775,807L
비주얼 씨에서 테스트해보았을 때는
long double 형도 double형과 똑같이 8바이트가 나오더군요...
반면에..
유닉스 환경에서 컴파일해 보니 long double유형이 12바이트가 나왔습니다...
궁금해서 MSDN을 뒤져보니....
Table 2.4 Sizes of Fundamental Types
| Type |
Size |
| char, unsigned char, signed char |
1 byte |
| short, unsigned short |
2 bytes |
| int, unsigned int |
4 bytes |
| long, unsigned long |
4 bytes |
| float |
4 bytes |
| double |
8 bytes |
| long double1 |
8 bytes |
1 The representation of long double and double is identical. However, long double and double are separate types.
| Type Name |
Bytes |
Other Names |
Range of Values |
| 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.