/* errexit.cpp - errexit */#include <stdarg.h>#include <stdio.h>#include <stdlib.h>#include <winsock.h>/*------------------------------------------------------------------------ * errexit - print an error message and exit *------------------------------------------------------------------------ *//*VARARGS1*/voiderrexit(const char *format, ...){	va_list	args;	va_start(args, format);	vfprintf(stderr, format, args);	va_end(args);	WSACleanup();	exit(1);}