Header Files

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Header files

A header file is a file containing C declarations and macro definitions (see Macros) to be shared between several source files. You request the use of a header file in your program with the C preprocessing directive #include.

See the following documentation for more detailed discussion of header files.

- Uses of header files
- The #include directive
- How #include works
- Once-only include files
- Inheritance and header files

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