socket客户端服务器

//by [email protected]
#include<iostream>
#include <stdlib.h> 
#include "unistd.h"
#include <errno.h> 
#include <string.h> 
#include <sys/types.h> 
#include <netinet/in.h> 
#include <sys/socket.h> 
#include <sys/wait.h> 
using std::cin;
using std::cout;
using std::endl;
void sig(int signal){
	int ch_pid;
	int sta;
	while(ch_pid=(waitpid(-1,&sta,0)>0)){}
}
int main(){
	signal(SIGCHLD,sig);
	int listenfd,confd;
	pid_t pid;
	socklen_t c_len;
	listenfd=socket(AF_INET,SOCK_STREAM,0);
	struct sockaddr_in cliaddr,serveraddr;
	bzero(&serveraddr,sizeof(serveraddr));
	serveraddr.sin_family = AF_INET;
	serveraddr.sin_addr.s_addr = htonl(INADDR_ANY);
	serveraddr.sin_port = htons(4546);
	bind(listenfd,(struct sockaddr*)&serveraddr,sizeof(serveraddr));
	listen(listenfd,0);
	while(true){
		confd = accept(listenfd,(struct sockaddr*)&cliaddr,&c_len);
		cout<<"accept"<<endl;
		if((pid=fork())==0){
			close(listenfd);
			write(confd,"hello , I am Server ! n ",100);
			close(confd);
			exit(0);
			return 0;
		}
		cout<<"receiv "<<endl;
		close(confd);
	}
	return 0;
}

//by [email protected]
#include<iostream>
#include <stdlib.h> 
#include "unistd.h"
#include <errno.h> 
#include <string.h> 
#include "stdio.h"
#include <sys/types.h> 
#include <netinet/in.h> 
#include <sys/socket.h> 
#include <sys/wait.h> 
#include <arpa/inet.h>
#include <string> 
using std::cin;
using std::cout;
using std::endl;
int main(){
	int confd;
	confd = socket(AF_INET,SOCK_STREAM,0);
	struct sockaddr_in addr;
	bzero(&addr,sizeof(addr));
	addr.sin_family = AF_INET;
	addr.sin_port = htons(4546);
	inet_pton(AF_INET,"127.0.0.1",&addr.sin_addr);
	connect(confd,(struct sockaddr*)&addr,sizeof(addr));
	char buffer[300];
	read(confd,buffer,300);
	cout<<buffer<<endl;
	return 0;
}