Synopsis
#include <stdarg.h> void va_start(va_list ap, rightmost);
Description
Use va_start to initialize the variable argument list ap,
so that va_arg can extract values from it. rightmost is
the name of the last explicit argument in the parameter list (the
argument immediately preceding the ellipsis `...' that flags
variable arguments in an ANSI C function header). You can only use
va_start in a function declared using this ellipsis notation
(not, for example, in one of its subfunctions).
Returns
va_start does not return a result.
Portability
ANSI C requires va_start.
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