[C++] 자료형(Data Type)

C++의 자료형(Data Type)

• C++ 의 자료형에는 기본형, 문자형, 정수형, 실수형(부동 소수점형)이 있다.
  • 기본형
    • void
  • 문자형
    • (singed) char
    • unsigned char
    • wchar_t
  • 정수형
    • bool
    • (signed) short (int)
    • unsigned short (int)
    • (signed) int
    • unsigned int
    • (signed) long (int)
    • unsigned long (int)
    • __int8
    • __int16
    • __int32
    • __int64
  • 실수형(부동 소수점형)
    • float
    • (long) double

 

정수 자료형의 크기 및 범위 (LLP64/IL32P64, Windows)

자료형	크기	범위	비고
char signed char	1 Byte 8 Bits	-128 ~ 127
unsigned char	1 Byte, 8 Bits	0 ~ 255
short short int	2 Bytes 16 Bits	-32,768 ~ 32,767	int 생략 가능
unsigned short unsigned short int	2 Bytes 16 Bits	0 ~ 65,535	int 생략 가능
int signed int	4 Bytes 32 Bits	-2,147,483,648 ~ 2,147,483,647
unsigned unsigned int	4 Bytes 32 Bits	0 ~ 4,294,967,295	int 생략 가능
long long int signed long signed long int	4 Bytes 32 Bits	-2,147,483,648 ~ 2,147,483,647	int 생략 가능
unsigned long unsigned long int	4 Bytes 32 Bits	0 ~ 4,294,967,295	int 생략 가능
long long long long int signed long long signed long long int	8 Bytes 64 Bits	-9,223,372,036,854,775,808 ~ 9,223,372,036,854,775,807	int 생략 가능
unsigned long long unsigned long long int	8 Bytes 64 Bits	0 ~ 18,446,744,073,709,551,615	int 생략 가능

 

자료형의 크기 및 범위 (Microsoft Visual C++)

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
bool	1	none	false or true
char	1	signed char	–128 to 127
unsigned char	1	none	0 to 255
long	4	long int signed long int	–2,147,483,648 to 2,147,483,647
long long	8	none (but equivalent to __int64)	–9,223,372,036,854,775,808 to 9,223,372,036,854,775,807
unsigned long	4	unsigned long int	0 to 4,294,967,295
unsigned long long	8	unsigned long long int	0 to 18,446,744,073,709,551,615
enum	*	none	Same as int
float	4	none	3.4E +/- 38 (7 digits)
double	8	none	1.7E +/- 308 (15 digits)
long double	8	none	same as double
wchar_t	2	__wchar_t	0 to 65,535

※ float 형은 소수점 최대 7자리까지, double 형, long double 형은 소수점 최대 15자리까지의 정확성을 보장한다.

※ A variable of __wchar_t designates a wide-character or multibyte character type.

※ By default wchar_t is a typedef for unsigned short.

 

참고

https://melonicedlatte.com/algorithm/2018/03/04/022437.html

C/C++ 에 존재하는 모든 자료형 개념 총 정리 - Easy is Perfect