Next: Undefining and Redefining Macros, Previous: Variadic Macros, Up: Macros [Contents][Index]

### 3.7 Predefined Macros

Several object-like macros are predefined; you use them without supplying their definitions. They fall into three classes: standard, common, and system-specific.

In C++, there is a fourth category, the named operators. They act like predefined macros, but you cannot undefine them.