What is the difference between “Real Types” and “Arithmetic Types” in C?

Question

The C99 standard describes them as so:

The integer and real floating types are collectively called real types.

Integer and floating types are collectively called arithmetic types.

Does this mean they're the same thing in C? Or are there any differences between them?

Answer 1

复杂类型是算术类型，但不是实数类型。

Answer 2

From ISO C 99 6.2.5 18:

Integer and floating types are collectively called arithmetic types. Each arithmetic type belongs to one type domain: the real type domain comprises the real types, the complex type domain comprises the complex types.