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C++ Data Types

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Modified on Sat, Jan 24, 2009, 6:10 PM by Administrator Categorized as C and C-plus-plus

Fundamental Data Types¶

Type	Also known as	Literals	Contents	Memory
`int`	`signed`; `signed int`		system dependent	4 bytes
`__int8`	`char`; `signed char`		-128 to 127	1 byte
`__int16`	`short`; `short int`; `signed short int`		-32,768 to 32,767	2 bytes
`__int32`	`signed`; `signed int`		-2,147,483,648 to 2,147,483,647	4 bytes
`__int64`	none			8 bytes
`char`	`signed char`	character enclosed in single quotes or a number	single character; -128 to 127 (ASCII)	1 byte
`unsigned char`	`unsigned char`	character enclosed in single quotes or a number	single character; 0 to 255 (ASCII)	1 byte
`short`	`short int`; `signed short int`		-32,768 to 32,767	2 bytes
`unsigned short`	`unsigned short int`		0 to 65,535	2 bytes
`long`	`long int`; `signed long int`	digits suffixed with an `L`	-2,147,483,648 to 2,147,483,647	4 bytes
`unsigned long`	`unsigned long int`	digits suffixed with a `UL`	0 to 4,294,967,295	4 bytes
`enum`	none		same as `int`	*
`float`	none	digits suffixed with an `f`	3.4E + 38 (7 digits)	4 bytes
`double`	none		1.7E + 308 (15 digits)	8 bytes
`long double`	none		1.2 E + 4932 (19 digits)	10 bytes

Numeric Data Types¶

Base	Literals
hexadecimal	Digits prefixed with `0x`
octal	Digits prefixed with `0` (zero)

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