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.

• Standard Predefined Macros
• Common Predefined Macros
• System-specific Predefined Macros
• C++ Named Operators