简单实现服务器/客户端的c代码

 #include<stdio.h>
 #include<stdlib.h>
 #include<string.h>
 #include<sys/types.h>
 #include<sys/socket.h>
 #include<netinet/in.h>
 #include <unistd.h>

 int main() {
     /* socket */
     int soc_ser_l=socket(PF_INET,SOCK_STREAM,);

     /* creat server sockaddr_in */
     struct sockaddr_in ser_addr;
     ser_addr.sin_family=AF_INET;
     ser_addr.sin_addr.s_addr=htonl(INADDR_ANY);
     ser_addr.sin_port=htons();
     memset(ser_addr.sin_zero,,);

     /* bind connect socket and ip/port */
     if(bind(soc_ser_l,(struct sockaddr*)&ser_addr,sizeof(ser_addr))==-)
     {
         printf("bind error");
         return ;
     }

     /* listen */
     if(listen(soc_ser_l,)==-)
     {
         printf("listen error");
         return ;
     }
     /* creat items */
     int soc_ser_t;
     struct sockaddr_in cli_addr;
     while (){
         /* accept */
         int len=sizeof(ser_addr);
         soc_ser_t=accept(soc_ser_l,(struct sockaddr *)&cli_addr,&len);
         if(soc_ser_t==-){
             perror("accept error");
             exit();
         }

         /* recv data */
         char recv_buf[];
         int ret=recv(soc_ser_t,recv_buf,,);
         if(ret>){
             recv_buf[ret]='\0';
             printf("server recv:");
             printf("%s\n",recv_buf);
         }

         /* send data  */
         char send_msg_str[];
         printf("server send:");
         fgets(send_msg_str,,stdin);
         *(strchr(send_msg_str,'\n'))='\0';
         send(soc_ser_t,send_msg_str,strlen(send_msg_str),);
         close(soc_ser_t);
     }

     close(soc_ser_l);
     return ;
 }

 #include<stdio.h>
 #include<string.h>
 #include<sys/types.h>
 #include<sys/socket.h>
 #include<netinet/in.h>
 #include <arpa/inet.h>
 #include <unistd.h>

 int main(){
     /* creat client socket */
     int soc_cli=socket(PF_INET,SOCK_STREAM,);
     /* creat server sockaddr_in */
     struct sockaddr_in ser_addr;
     ser_addr.sin_family=PF_INET;
     ser_addr.sin_addr.s_addr=inet_addr("192.168.195.129");
     ser_addr.sin_port=htons();//8888 port number has no ""
     memset(ser_addr.sin_zero,,);

     /* connect */
     if(connect(soc_cli,(struct sockaddr*)&ser_addr,sizeof(ser_addr))==-){
         printf("connect error");
         return ;
         }

     /* send */
     char cli_send_str[];
     printf("client send:");
     fgets(cli_send_str,,stdin);
     *(strchr(cli_send_str,'\n'))='\0';

     send(soc_cli,cli_send_str,strlen(cli_send_str),);

     /* recv */
     char cli_recv[];
     int ret=recv(soc_cli,cli_recv,,);
     if(ret>){
         cli_recv[ret]='\0';
         printf("client recv:");
         printf("%s\n",cli_recv);
         }

     close(soc_cli);
     return ;
     }