Argument Access

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The va_arg, va_end, and va_start macros provide access to function arguments when the number of arguments is variable. These macros are defined in STDARG.H for ANSI C compatibility, and in VARARGS.H for compatibility with UNIX System V.

Argument-Access Macros

Macro Use
va_arg Retrieve argument from list
va_end Reset pointer
va_start Set pointer to beginning of argument list