echoclient.cc

达内IT培训Unix C++第一天源码（共四天） 是入门Unix 下C++编程的好东西

#include <iostream>
using namespace std;
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <unistd.h>
#include <fcntl.h>
#include <cstring>

int main()
{
	cout << "input server IP and port:";
	char ip[100];
	short port;
	cin >> ip >> port;
	sockaddr_in si;
	si.sin_family = AF_INET;
	si.sin_port = htons(port);
	inet_pton(AF_INET,ip,&si.sin_addr);
	int s = socket(AF_INET,SOCK_STREAM,0);
	if(s<0){
		cout << "error socket!" << endl;
		return -1;
	}
	socklen_t len=sizeof(si);
	if(connect(s,(sockaddr*)&si,len)<0){
		cout << "error connect!" << endl;
		return -1;
	}
	char buf[1000];
	for(;;){
		int n=read(s,buf,1000);
		if(n<=0) break;
		cout << "::" << buf << endl;
		cout << "input:";
		cin.getline(buf, 1000);
		strcat(buf, "\n");
		write(s, buf, strlen(buf));
		if(buf[0]=='q') break;
	}
	close(s);
}