va_arg, va_copy, va_end, va_start
가변 인수 목록에 액세스합니다. Accesses variable-argument lists. type va_arg( va_list arg_ptr, type ); void va_copy( va_list dest, va_list src ); // (ISO C99 and later) void va_end( va_list arg_ptr ); void va_start( va_list arg_ptr, prev_param ); // (ANSI C89 and later) void va_start( arg_ptr ); // (deprecated Pre-ANSI C89 standardization version) The Va_arg, va_arg, va_copy, va_end, and va_start macros provide a portable way to access the arguments to a function when the function takes a variable number of arguments.