stdarg.h'
In ANSI 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 C defines 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 called va_list.
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