利用进程实现tcp客户端信息的收发

fork创建一个子进程用来接收 父进程用来发送

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



int main(int argc, char const *argv[])
{
    int tcp_socket = socket(AF_INET, SOCK_STREAM, 0);
    if(tcp_socket < 0)
    {
        perror("");
    }else{

        printf("tcp通信对象创建成功！\n");
    }

    //2.链接服务器
    struct sockaddr_in ser_addr;
    ser_addr.sin_family = AF_INET;//IPV4
    ser_addr.sin_port = htons(6666) ;//采用大端序
    ser_addr.sin_addr.s_addr = inet_addr("192.168.202.1");

     int ret = connect(tcp_socket,(struct sockaddr *)&ser_addr, sizeof(ser_addr));

     if(ret < 0)
     {
        perror("");
     }else{
        printf("链接成功！\n");
     }


    //3.发送数据

   pid_t pid =  fork();
   if(pid == 0)
   {
    while (1)
    {
        //读取数据
        char buf[1024]  = {0};
        read(tcp_socket,buf,1024);
        printf("%s\n",buf); 
    }
    

   }else
   {
        while (1)
        {

            //发送数据
            char buf[1024]  = {0};
            scanf("%s",buf);
            write(tcp_socket,buf,strlen(buf));

        }
   }



    return 0;
}