一个最简单的聊天程序2

1. #include <stdio.h>
2. #include <string.h>
3. #include <conio.h>
4. #include <winsock2.h>
5. #pragma comment(lib,"Ws2_32.lib")
7. SOCKET server;
8. SOCKET client;
10. WSADATA wsaData;
11. int wsaReturn;
12. sockaddr_in local;
13. sockaddr_in from;
14. int fromlen = sizeof(from);
16. int sendlen = 0;
18. static char chat[256] = {0};
19. char recevie[256] = {0};
20. static char infor[50] = {0};
21. char welcome[] = "欢迎登陆到Etionas的主机";
23. bool cansend = false;
25. int MyServer(void)
26. {
27.     wsaReturn = WSAStartup(0x101,&wsaData);
28.     if(wsaReturn != 0)
29.     {
30.         printf("未知错误!/n");
31.         WSACleanup();
32.         return 0;
33.     }
35.     local.sin_family = AF_INET;
36.     local.sin_addr.s_addr = ADDR_ANY;
37.     local.sin_port = htons((u_short)4567);
39.     server = socket(AF_INET,SOCK_STREAM,0);
40.     if(client == INVALID_SOCKET)
41.     {
42.         printf("创建socket失败!/n");
43.         return 0;
44.     }
46.     if(bind(server,(sockaddr *)&local,sizeof(local)) != 0)
47.     {
48.         printf("绑定失败!/n");
49.         return 0;
50.     }
52.     if(listen(server,5) != 0)
53.     {
54.         printf("监听失败!/n");
55.         return 0;
56.     }
58.     while(1)
59.     {
60.         printf("等待客户的连接…………/n");
61.         client = accept(server,(sockaddr *)&from,&fromlen);
62.         if(client == INVALID_SOCKET)
63.         {
64.             printf("accept失败!/n");
65.             return 0;
66.         }
67.         else
68.         {
69.             strcpy(infor,inet_ntoa(from.sin_addr));
70.             printf("接受来自%s的连接/n",infor);
71.             printf("发送欢迎消息……/n");
72.             if((sendlen = send(client,welcome,sizeof(welcome),0)) == -1)
73.             {
74.                 printf("发送欢迎消息失败!/n");
75.                 return 0;
76.             }
77.             else
78.             {
79.                 printf("要发送的数据长度为%d/n",sizeof(welcome));
80.                 printf("实际发送的数据长度为%d/n",sendlen);
81.             }
83.             while(1)
84.             {
85.                 if(!cansend)
86.                 {
87.                     printf("………………………………接收消息…………………………/n");
88.                     recv(client,recevie,sizeof(recevie),0);
89.                     printf("%s/n",recevie);
90.                     cansend = true;
91.                     printf("………………………………接收完成…………………………/n");
92.                 }
93.                 else
94.                 {
95.                     printf("请输入你要说的话:");
96.                     scanf("%s/0",chat);
97.                     send(client,chat,strlen(chat)+1,0);
98.                     cansend = false;
99.                 }
100.             }
101.         }
102.         closesocket(client);
103.     }
104.     closesocket(server);
105.     WSACleanup();
106.     return 0;
107. }
108. int main(void)
109. {
110.     int ok;
111.     ok = MyServer();
112.     if(!ok)
113.     {
114.         printf("启动服务器失败!/n");
115.     }
116.     return 0;
117. }

//服务器端代码：