Standard library header <stdarg.h>

This header provides support for varying arguments.

Types
va_list	holds the information needed by va_start, va_arg, va_end, and va_copy (typedef)
Macros
va_start	enables access to variadic function arguments (function macro)
va_arg	accesses the next variadic function argument (function macro)
va_copy (C99)	makes a copy of the variadic function arguments (function macro)
va_end	ends traversal of the variadic function arguments (function macro)

Synopsis

#define __STDC_VERSION_STDARG_H__ 202311L

typedef /*unspecified*/ va_list;

/*type*/ va_arg(va_list ap, /*type*/);
void va_copy(va_list dest, va_list src);
void va_end(va_list ap);
void va_start(va_list ap, ...);