套接字问题
各位大虾 本人初学套接字 我就想问问我的程序为什么老是连不上呢????

服务端:

C/C++ code

#include <stdio.h>      2 #include <stdlib.h>      3 #include <sys/types.h>      4 #include <sys/socket.h>      5 #include <string.h>      6 #include <arpa/inet.h>      7      8      9 #define PORT 5000     10     11     12 int main()     13 {          14         int listensfd,connectfd;     15         struct sockaddr_in server;     16         struct sockaddr_in client;     17         int sin_size;     18     19         listensfd = socket(AF_INET,SOCK_STREAM,0);     20         if (listensfd < 0)     21         {     22                 perror("socket failed!");     23                 exit(1);                }     25         else     26         {     27                 printf("Create socket success!\n");     28         }     29     30         bzero(&server,sizeof(server));     31         server.sin_family = AF_INET;     32         server.sin_port = htons(PORT);     33         server.sin_addr.s_addr = htonl(INADDR_ANY);     34         if (bind(listensfd,(struct sockaddr *)&server,sizeof(struct sock addr)) == -1)     35         {     36                 perror("bind error!");     37                 exit(1);     38         }     39         else     40         {     41                 printf("bind success!\n");     42         }     43     44         if (listen(listensfd,5) < 0)     45         {     46                 printf("listen error!");     47                 exit(1);     48         }     49         else     50         {     51                 printf("listen success!\n");     52         }     53     54         sin_size = sizeof(struct sockaddr_in);     55         if ((connectfd = accept(listensfd,(struct sockaddr *)&client,&sin_size)) == -1)     56         {     57                 perror("accept error!");     58                 exit(1); }     60         else     61         {     62                 printf("asdfsdfsadf");     63                 send(connectfd,"Welcom to my service!",50,0);     64                 close(connectfd);     65                 close(listensfd);     66         }     67         return 1;     68 }

C/C++ code

      1 #include <stdio.h>      2 #include <string.h>      3 #include <sys/types.h>      4 #include <sys/socket.h>      5 #include <netinet/in.h>      6 #include <arpa/inet.h>      7      8      9 #define PORT 5000     10     11 int main()     12 {     13         int sockfd;     14         char buf[512];     15         struct sockaddr_in server;     16         sockfd = socket(AF_INET,SOCK_STREAM,0);     17         if (sockfd < 0)     18         {     19                 perror("Create socket failed!\n");     20                 exit(1);     21         }     22         else     23         {     24                 printf("Creat socket success!\n");     25         }     26         bzero(&server,sizeof(server));     27         server.sin_family = AF_INET;     28         server.sin_port = htons(PORT);     29         inet_aton("127.0.0.1",&server.sin_addr);     30         if (connect(sockfd,(struct sockaddr *)&server,sizeof(struct sockaddr) < 0))     31         {     32                 perror("connect failed!\n");     33         }     34         else     35         {     36                 recv(sockfd,buf,sizeof(buf),0);     37                 printf("%s",buf);     38         }     39 }

在client中，
30 if (connect(sockfd,(struct sockaddr *)&server,sizeof(struct sockaddr) < 0))


写错了,改成

30 if (connect(sockfd,(struct sockaddr *)&server,sizeof(struct sockaddr) )< 0)

[解决办法]
http://hi.baidu.com/shirdrn/blog/item/62eb0f109ab37309213f2ef1.html