HP C A.06.05 Reference Manual

Chapter 7 185
7 Preprocessing Directives
Preprocessing directives work as compiler control lines. They allow you to direct the compiler
to perform certain actions on the source file.
You can select from any of the following topics:
• Source File Inclusion (#include)
• Macro Replacement (#define, #undef)
• Predefined Macros
• Conditional Compilation (#if, #ifdef, ..#endif)
• Line Control (#line)
• Pragma Directive (#pragma)
• _Pragma
• Error Directive (#error)
• Trigraph Sequences