net_client.cpp

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

#define MYPORT 9877
#define BUFFER_SIZE 1024

int main()
{
    //定义socket
    int sock_cli = socket(AF_INET,SOCK_STREAM,0);
    //定义sockaddr_in
    struct sockaddr_in servaddr;

    memset(&servaddr,0,sizeof(servaddr));
    servaddr.sin_family = AF_INET;
    servaddr.sin_port = htons(MYPORT);
    servaddr.sin_addr.s_addr = inet_addr("127.0.0.1");

    //连接服务器,成功返回0,出错返回-1
    if(connect(sock_cli,(struct sockaddr*)&servaddr,sizeof(servaddr))<0)
    {
        error("connect error!\n");
        exit(1);
    }

    char sendbuf[BUFFER_SIZE];
    char recvbuf[BUFFER_SIZE];
    memset(sendbuf,0,sizeof(sendbuf));
    memset(recvbuf,0,sizeof(recvbuf));
    while(fgets(sendbuf,sizeof(sendbuf),stdin)!=NULL)
    {
        send(sock_cli,sendbuf,strlen(sendbuf),0);
        if(strcmp(sendbuf,"exit\n")==0)
        {
            break;
        }
        recv(sock_cli,recvbuf,sizeof(recvbuf),0);
        fputs(recvbuf,stdout);
        memset(sendbuf,0,sizeof(sendbuf));
        memset(recvbuf,0,sizeof(recvbuf));
    }
    close(sock_cli);
    return 0;
}