void search() /*查询函数*/
{
int t,flag;
do
{
printf("\n按学号查询请按1;按姓名查询请按2;进入主函数按3\n");
scanf("%d",&t);
if(t>=1&&t<=3)
{
flag=1;
break;
}
else
{
flag=0;
printf("您输入有误，请重新选择!");
}
}
while(flag==0);
while(flag==1);
{
switch(t)
{
case 1:printf("按学号查询\n");search_num();break;
case 2:printf("按姓名查\n");search_name();break;
case 3:main();break;
default:break;
}
}
}
void main()
{
void creat();
void insert_by_head();
void insert_by_end();
void search_n_ele();
void search_num();
void serch_both();
void del();
void print();
creat();
insert_by_head();
insert_by_end();
search_n_ele();
search_num();
serch_both();
del();
print();
free(head);
}
int main(int argc, char *argv[])
{
int port_no;
int ipaddr;
int n;
char buf[BLKSIZE];
char buf2[BLKSIZE], output_buff[BLKSIZE];
struct timeval t1, t2;
struct sockaddr_in serv_addr2;
int serv_len2;
struct hostent *retrieve;
double r_sec, diff;
int rflag, wflag, endflag;
if (argc < 3) {
fprintf(stderr,"Usage: client serv_addr id(character) [port_no]\n");
exit(1);
}
port_no = (argc > 3) ? atoi(argv[2]) : SERV_UDP_PORT;
if ((retrieve = gethostbyname(argv[1])) == NULL) {
printf("Unknown host name: %s\n", argv[1]);
exit(1);
}
id = *argv[2];
ipaddr = *(unsigned int *)(retrieve->h_addr_list[0]);
printf("%d.%d.%d.%d (%d) に 入力した文字列を送信します\n",
ipaddr & 0xff, (ipaddr >> 8) & 0xff, (ipaddr >> 16) & 0xff, (ipaddr >> 24) & 0xff,
port_no);
bzero((char *)&serv_addr, sizeof(serv_addr));
serv_addr.sin_family = AF_INET;
serv_addr.sin_addr.s_addr = *(unsigned int *)(retrieve->h_addr_list[0]);
serv_addr.sin_port = htons(port_no);
if ((sockfd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
err_msg("client: can't open datagram socket");
}
bzero((char *)&cli_addr, cli_len);
cli_addr.sin_family = AF_INET;
cli_addr.sin_addr.s_addr = htonl(INADDR_ANY);
cli_addr.sin_port = htons(0);
if (bind(sockfd, (struct sockaddr *)&cli_addr, cli_len) < 0) {
err_msg("client: can't bind local address");
}
fcntl(sockfd, F_SETFL, O_NONBLOCK);
rflag = 1; wflag = 0;
while ( 1 ) {
if ( rflag == 1 ) {
if ( fgets(buf, BLKSIZE, stdin) ) {
strtok(buf, "\n\0");
if ( buf[0] == '\001' ) {
endflag = 0;
break;
}
rflag = 0;
}
}
if ( rflag == 0 ) {
gettimeofday(&t1, NULL);
sprintf(buf, "%s:%0.f.%0.f", buf, (double)t1.tv_sec, (double)t1.tv_usec);
if ( sendto(sockfd, buf, BLKSIZE, 0, (struct sockaddr *)&serv_addr, serv_len) > 0) {
rflag = 1;
}
}
while ( wflag == 0 ) {
n = recvfrom(sockfd, buf2, BLKSIZE, MSG_WAITALL, (struct sockaddr *)&serv_addr2, &serv_len2);
gettimeofday(&t2, NULL); // 受け取った時間を取得
if ( n > 0 ) {
if( buf2[0] == '\001' ) {
endflag = 1;
break;
}
r_sec = atof(search_num(buf2)); // 時間の部分を取得
wflag = 1;
}
}
if ( wflag == 1 ) {
diff = tvaltof(t1.tv_sec, t1.tv_usec) + tvaltof(t2.tv_sec, t2.tv_usec) - r_sec;
sprintf(output_buff, "%s\n%s\n%.0f.%.0f\n%f", buf, buf2, (double)t2.tv_sec, (double)t2.tv_usec, diff);
if ( fprintf(stdout, "%s\n", output_buff) ) { wflag = 0; }
}
}
if ( endflag == 0 ) {
fprintf(stdout, "%d.%d.%d.%d (%d)との通信終了\n", ipaddr & 0xff, (ipaddr >> 8) & 0xff, (ipaddr >> 16) & 0xff, (ipaddr >> 24) & 0xff, port_no);
}
