The types are defined as a set of values in C++.

They can have different proposes in a program, and that is why they are classified in this order:

  • Character types: They can represent a single character, such as ‘A’ or ‘$’. The most basic type is char, which is a one-byte character.
  • Numerical integer types: They can store a whole number value, such as 7 or 1024. They exist in a variety of sizes, and can either be signed or unsigned, depending on whether they support negative values or not.
  • Floating-point types: They can represent real values, such as 3.14 or 0.01, with different levels of precision, depending on which of the three floating-point types is used.
  • Boolean type: The Boolean type, known in C++ as bool, can only represent one of two states, true or false.
Category Type Contents
Integral char Type char is an integral type that usually contains members of the execution character set — in Microsoft C++, this is ASCII.
The C++ compiler treats variables of type char, signed char, and unsigned char as having different types. Variables of type char are promoted to int as if they are type signed charby default, unless the /J compilation option is used. In this case they are treated as typeunsigned char and are promoted to int without sign extension.
bool Type bool is an integral type that can have one of the two values true or false. Its size is unspecified.
short Type short int (or simply short) is an integral type that is larger than or equal to the size of type char, and shorter than or equal to the size of type int.
Objects of type short can be declared as signed short or unsigned short. Signed short is a synonym for short.
int Type int is an integral type that is larger than or equal to the size of type short int, and shorter than or equal to the size of type long.
Objects of type int can be declared as signed int or unsigned int. Signed int is a synonym for int.
__intn Sized integer, where n is the size, in bits, of the integer variable. The value of n can be 8, 16, 32, or 64. (__intn is a Microsoft-specific keyword.)
long Type long (or long int) is an integral type that is larger than or equal to the size of typeint.
Objects of type long can be declared as signed long or unsigned long. Signed long is a synonym for long.
longlong Larger than an unsigned long.
Objects of type long long can be declared as signed long long or unsigned long long.Signed long long is a synonym for long long.
Floating float Type float is the smallest floating type.
double Type double is a floating type that is larger than or equal to type float, but shorter than or equal to the size of type long double.
long double 1 Type long double is a floating type that is equal to type double.
Wide-character __wchar_t A variable of __wchar_t designates a wide-character or multibyte character type. By default,wchar_t is a native type but you can use /Zc:wchar_t- to make wchar_t a typedef forunsigned short.

Use the L prefix before a character or string constant to designate the wide-character-type constant.

Fundamental Types has also need a amount of storage required and depending on the category it will define how much space it needs.

Group Type names* Notes on size / precision
Character types char Exactly one byte in size. At least 8 bits.
char16_t Not smaller than char. At least 16 bits.
char32_t Not smaller than char16_t. At least 32 bits.
wchar_t Can represent the largest supported character set.
Integer types (signed) signed char Same size as char. At least 8 bits.
signed short int Not smaller than char. At least 16 bits.
signed int Not smaller than short. At least 16 bits.
signed long int Not smaller than int. At least 32 bits.
signed long long int Not smaller than long. At least 64 bits.
Integer types (unsigned) unsigned char (same size as their signed counterparts)
unsigned short int
unsigned int
unsigned long int
unsigned long long int
Floating-point types float
double Precision not less than float
long double Precision not less than double
Boolean type bool
Void type void no storage
Null pointer decltype(nullptr)

This pages really help me out!

http://www.cplusplus.com/doc/tutorial/variables/

https://msdn.microsoft.com/en-us/library/cc953fe1.aspx

-The Admin!

CC BY 4.0 Basic Types and their use in C++ by esaupreciado is licensed under a Creative Commons Attribution 4.0 International License.