client.cpp~

本代码是基于LINUX系统下的

#include <iostream>
#include <stdio.h>
#include <unistd.h>
#include <errno.h>
#include <sys/select.h>
#include <string>
#include <sys/types.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <sys/socket.h>
#include <sys/wait.h>
#include <netdb.h>
#define PORT 3490
#define MAXDATASIZE 100
using namespace std;

int main(int argc, char *argv[])
{
	int sockfd;
	int numbytes;
	char buf[MAXDATASIZE] = "ni shi ge sha ";
	fd_set readfd;
	int len = 0;
	int i = 0;
	struct hostent *he;
	struct sockaddr_in their_addr;
	FD_ZERO(&readfd);
	if((sockfd = socket(AF_INET, SOCK_STREAM, 0)) == -1)
	{
		perror("socket");
		exit(1);
	}
	their_addr.sin_family = AF_INET;
	their_addr.sin_port = htons(PORT);
	their_addr.sin_addr.s_addr = inet_addr("127.0.0.1");
	bzero(&(their_addr.sin_zero), 8);
	if(connect(sockfd, (struct sockaddr *)&their_addr, sizeof(struct sockaddr)) == -1)
	{
		perror("connect");
		exit(1);
	}
	send(sockfd, buf, 100, 0);
	FD_ZERO(&readfd);
//	FD_SET(sockfd, &readfd);
//	select(2, &readfd, NULL, NULL, 0);
	while(1)
	{
		cin.getline(buf, 100, '\n');	
		len = strlen(buf);
		if((send(sockfd, buf, len, 0))== -1)
		{
			perror("send");
			exit(1);
		}
		memset(buf, '\0', 100);
		if(fork() == 0)
		{
			recv(sockfd, buf, 100, 0);
			cout << "the message from sever:"<< buf<< endl;
			exit(0);
		}
	//	FD_SET(sockfd, &readfd);
	//	select(2, &readfd,NULL , NULL, 0);
	/*	if(FD_ISSET(sockfd, &readfd))
		{
			if((recv(sockfd, buf, 100, 0)) == -1)
			//perror("recv");
			cout<< buf<< endl;
			//FD_CLR(sockfd, &readfd);
		}
		FD_ZERO(&readfd);
		//cin>> buf;
		
	}*/
	//buf[numbytes] = '\0';
	//cout<< "received: "<< buf<< endl;
//	close(sockfd);
	}	
}