64비트 리눅스에서의 gcc 데이터 타이별 사이즈

( signed | unsigned ) char : 1byte
( unsigned ) short : 2byte
( unsigned ) int : 4byte
( unsigned ) long : 8 byte
float : 4byte
double : 8byte
long double : 16byte

주의사항: VC++ 64bit 버전에선 long 타입이 4byte.

참고로 integer의 사이즈 때문에 고민스러울 떄는 그냥
- #include <stdint.h>
를 해주자.

int32_t 타입등에 대해서 궁금할 때는
http://linux.die.net/man/3/int32_t

아랫 부분의 위의 URL에서 발췌.

Exact-width integer types

Integer types having exactly the specified width

typedef signed char int8_t

typedef unsigned char uint8_t

typedef signed int int16_t

typedef unsigned int uint16_t

typedef signed long int int32_t

typedef unsigned long int uint32_t

typedef signed long long int int64_t

typedef unsigned long long int uint64_t

Integer types capable of holding object pointers

These allow you to declare variables of the same size as a pointer.

typedef int16_t intptr_t

typedef uint16_t uintptr_t

Minimum-width integer types

Integer types having at least the specified width

typedef int8_t int_least8_t

typedef uint8_t uint_least8_t

typedef int16_t int_least16_t

typedef uint16_t uint_least16_t

typedef int32_t int_least32_t

typedef uint32_t uint_least32_t

typedef int64_t int_least64_t

typedef uint64_t uint_least64_t