VC++ tutorial

A classification of the type of data that a variable or object can hold in computer programming. Data types are an important factor in virtually all computer programming language. for example: integer, floating point, character, string, and pointer.

Fundamental of Datatypes

Type	Size in Bytes	Range of Values	Examples of Literals
bool	1	true or false	true, false
char	1	By default the same as type signed char: –128 to +127. Optionally you can make char the same range as type unsigned char.	‘A’, ‘Z’, ‘8’, ‘*’
signed char	1	–128 to +127
unsigned char	1	0 to 255
wchar_t	2	0 to 65,535	L’A’, L’Z’, L’8’, L’*’
short	2	–32,768 to +32,767
unsigned short	2	0 to 65,535
int	4	-77, 65, 12345, 0x9FE
unsigned int	4	0 to 4,294,967,295	10U, 64000U
long	4	–2,147,483,648 to 2,147,483,647	-77L, 65L, 12345L
unsigned long	4	0 to 4,294,967,295	5UL, 999999999UL
float	4	±3.4×10±38 with approximately 7 digits accuracy	3.14f, 34.506f
double	8	±1.7×10±308 with approximately 15 digits accuracy	1.414, 2.71828
long double	8	±1.7×10±308 with approximately 15 digits accuracy	1.414L, 2.71828L