#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 }

      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 }