C++(www.cppentry.com) defines a set of arithmetic types, which represent integers, floating-point numbers, and individual characters and boolean values. In addition, there is a special type named void. The void type has no associated values and can be used in only a limited set of circumstances. The void type is most often used as the return type for a function that has no return value.

C++(www.cppentry.com) 的基本内置类型包括算术类型（整数、浮点数、字符、布尔值）和void。

The size of the arithmetic types varies across machines. By size, we mean the number of bits used to represent the type. The standard guarantees a minimum size for each of the arithmetic types, but it does not prevent compilers from using larger sizes. Indeed, almost all compilers use a larger size for int than is strictly required. Table 2.1 (p. 36) lists the built-in arithmetic types and the associated minimum sizes.

Because the number of bits varies, the maximum (or minimum) values that these types can represent also vary by machine.