Question

The three macros defined by stdarg.h is _________

(a) start(), arg() and end()

(b) var_start(), var_arg() and var_end()

(c) va_start(), va_arg() and va_end()

(d) v_start(), v_arg() and v_end()

The question was asked by my college professor while I was bunking the class.

My question is from Variable Argument Lists in division C Library of C

Answer 1

Right option is (c) va_start(), va_arg() and va_end()

Best explanation: The header file stdarg.h has three macros defined in it. They are va_start(), va_arg() and va_end(). va_list  is a variable type that holds information needed by the three macros.