#include<sys/socket.h>
#include<stdio.h>
#include<stdlib.h>
#include<string.h>
#include<netinet/in.h>
#include<arpa/inet.h>
#include<unistd.h>
int main()
{
int fd = socket(AF_INET，SOCK_DGRAM，0);
if(fd == -1 )
{
printf("socket error:%m ");
exit(-1);
}else{
printf("socket complete:%m ");
}
struct sockaddr_in addr = {0};
addr.sin_family = AF_INET;
addr.sin_port = htons(8888);
addr.sin_addr.s_addr = inet_addr("192.168.64.128");
int r = connect(fd，reinterpret_cast<struct sockaddr*>(&addr)，sizeof(addr));
if(r == -1)
{
printf("bind error%m ");
exit(-1);
}else{
printf("bind complete ");
}
write(fd，"come from ipB!"，strlen("come from ipB!"));
close(fd);
return 0;
}

　　将以上两段程序与开始两段程序对比着看，总的来说编程的步骤是一样的，主要是结构体struct sockaddr_un{}与struct sockaddr_in{}的无别和socket()中第一个参数的区别。这也说明了基于socket的进程间的通信模型可以很好的推广到网络编程。