1 /* TCPClient.cpp  -- 用于传递struct */
 2 #include <stdlib.h>
 3 #include <stdio.h>
 4 #include <winsock2.h>
 5 #include <string.h>
 6 #include <time.h>
 7 #include <windows.h>
 8 #include <process.h>
 9 #include <math.h>
10 #define    BUFLEN        2000                  // 缓冲区大小
11 #define WSVERS        MAKEWORD(2, 0)        // 指明版本2.0 
12 #pragma comment(lib,"ws2_32.lib")         // 指明winsock 2.0 Llibrary
13 
14 /*------------------------------------------------------------------------
15 * main - TCP client for DAYTIME service
16 *------------------------------------------------------------------------*/
17 
18 SOCKET    sock, sockets[100] = { NULL };     /* socket descriptor            */                                                            //    int    cc;                                /* recv character count            */
19 char    *packet = NULL;               /* buffer for one line of text    */
20 char *pts, *input;
21 HANDLE hThread;
22 unsigned threadID;
23 
24 unsigned int __stdcall Chat(PVOID PM) {
25     time_t    now;
26     (void)time(&now);
27     pts = ctime(&now);
28     char buf[2000];
29     while (1) {
30         int cc = recv(sock, buf, BUFLEN, 0);   //cc为接收的字符数
31         if (cc == SOCKET_ERROR || cc == 0) {
32             printf("Error: %d ", GetLastError());
33             printf("与服务器断开连接！\n");
34             (void)closesocket(sock);
35             break;
36         }
37         else if (cc > 0) {
38             buf[cc] = '\0';
39             printf("%s\n", buf);
40         }
41     }
42     return 0;
43 }
44 int main(int argc, char *argv[]) {
45     time_t    now;
46     (void)time(&now);
47     pts = ctime(&now);
48     //char    *host = "192.168.220.1"; /* server IP to connect         */
49     //char *host = "192.168.220.1";
50     char *host = "202.116.76.22";
51     char *service = "5050";          /* server port to connect       */
52     struct  sockaddr_in sin;            /* an Internet endpoint address    */
53     WSADATA wsadata;
54     WSAStartup(WSVERS, &wsadata);       /* 启动某版本Socket的DLL        */
55     memset(&sin, 0, sizeof(sin));
56     sin.sin_family = AF_INET;
57     sin.sin_port = htons((u_short)atoi(service));    //atoi：把ascii转化为int. htons：主机序(host)转化为网络序(network), s--short
58     sin.sin_addr.s_addr = inet_addr(host);           //如果host为域名，需要先用函数gethostbyname把域名转化为IP地址
59     sock = socket(PF_INET, SOCK_STREAM, 0);
60     hThread = (HANDLE)_beginthreadex(NULL, 0, Chat, NULL, 0, &threadID);
61     printf("                             LET'S CHAT(CLIENT)\n");
62     connect(sock, (struct sockaddr *)&sin, sizeof(sin));
63     while (1) {
64         printf("请输入您要发送的信息:\n");
65         char buf1[2000];
66         gets_s(buf1);
67         if (!strcmp(buf1, "exit"))
68             goto end;
69         (void)send(sock, buf1, sizeof(buf1), 0);
70         (void)time(&now);
71         pts = ctime(&now);
72         printf("发送成功！\n当前时间:%s\n", pts);
73     }
74 
75 end:
76     CloseHandle(hThread);
77     closesocket(sock);
78     WSACleanup();                     /* 卸载某版本的DLL */
79     printf("按回车键继续...");
80     getchar();
81     return 0;                           /* exit */
82 }