typedef char *va_list; #define va_start(list, start) list = (char *)(&(start)+1)#define va_end(list)#define va_arg(list, mode) (sizeof(mode)==1 ? ((mode *) (list += 4))[-4] : \sizeof(mode)==2 ? ((mode *) (list += 4))[-2] : ((mode *) (list += sizeof(mode)))[-1])