| Predefined Macros

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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