ANSI-standard macros, stdarg.h

Contents|Index|Previous|Next
ANSI-standard macros (stdarg.h)

By ANSI standards for C, a function has a variable number of arguments when its parameter list ends in an ellipsis (. . .). The parameter list must also include at least one explicitly named argument; that argument is used to initialize the variable list data structure.

ANSI standards for C define three macros ( va_start, va_arg, and va_end) to operate on variable argument lists. stdarg.h also defines a special type to represent variable argument lists; this type is va_list (for usage of va_list, see vprintf, vfprintf, vsprintf, va_arg, and va_start).