Is a macro that obtains the next argument in a list of variable arguments.
#include <stdarg.h>
type va_arg (
param,
type);
(IN) Specifies a variable argument list.
(IN) Specifies the argument type.
Returns the value of the next variable argument, according to type passed as the second parameter.
The macro va_arg can be used to obtain the next argument in a list of variable arguments. It must be used with the associated macros va_start and va_end. A sequence such as the following:
va_list curr_arg;
type next_arg;
next_arg = va_arg (curr_arg, type);
causes next_arg to be assigned the value of the next variable argument. The type is the type of the argument originally passed.
The macro va_start must be executed first in order to properly initialize the variable next_arg and the macro va_end should be executed after all arguments have been obtained.
The data item curr_arg is of type va_list which contains the information to permit successive acquisitions of the arguments.