#include	"unp.h"intmain(int argc, char **argv){	int					sockfd;	socklen_t			salen;	struct sockaddr		*sa;	if (argc != 3)		err_quit("usage: udpcli01 <hostname> <service>");	sockfd = Udp_client(argv[1], argv[2], (void **) &sa, &salen);	dg_cli(stdin, sockfd, sa, salen);	exit(0);}