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Argument access

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/ISO 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

See also

Universal C runtime routines by category