echoclnt.cpp

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

#define SERVERIP "127.0.0.1"
#define SERVERPORT 13000
#define MAXBUFFER 256

int main(int argc,char** argv)
{
    int clientFd,ret;
    struct sockaddr_in serveraddr;
    char buf[MAXBUFFER];
    clientFd=socket(AF_INET,SOCK_STREAM,0);//创建socket
    if(clientFd<0)
    {
        printf("socket error:%s \n",strerror(errno));
        exit(-1);
    }

bzero(&serveraddr,sizeof(serveraddr));
    serveraddr.sin_family=AF_INET;
    serveraddr.sin_port=htons(SERVERPORT);
    inet_pton(AF_INET,SERVERIP,&serveraddr.sin_addr);

//连接到服务器
    ret=connect(clientFd,(struct sockaddr *)&serveraddr,sizeof(serveraddr));

if(ret!=0)
    {
        close(clientFd);
        printf("connect error:%s \n",strerror(errno));
        exit(-1);
    }
    while(1)
    {
        bzero(buf,sizeof(buf));
        scanf("%s",buf);
        write(clientFd,buf,sizeof(buf));//写数据
        bzero(buf,sizeof(buf));
        read(clientFd,buf,sizeof(buf));//读数据
        printf("pid=%d, 20191205, zx, echo:%s\n",getpid(), buf);
    }
    close(clientFd);
    return (EXIT_SUCCESS);
}

20191205 / zx代码

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echoclnt.cpp

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20191205 / zx代码