socket编程c ++连接错误

Question

你可以帮我解决socket编程问题。我的目的是读取包含一些ip的.txt文件，打开一个套接字并检查所有ip的连接状态。 我为此编写的代码是： -

int main()

{

char data[100];

ofstream myfile;
myfile.open("new.txt");

myfile<<"www.google.com";

myfile<<"www.yahoo.com"

myfile.close();

ifstream readfile;

readfile.open("new.txt");

while(!readfile.eof())

{

if(!readfile.eof())

{

readfile.getline(data,100);

int status;

struct addrinfo host_info;

struct addrinfo *host_info_list;

 memset(&host_info, 0, sizeof host_info);

 host_info.ai_family = AF_INET;

 host_info.ai_socktype = SOCK_STREAM;

 status = getaddrinfo("data", "22", &host_info, &host_info_list);

 if (status != 0)  cout << "getaddrinfo error" << gai_strerror(status) ;


else

{

 int socketfd;

socketfd = socket(host_info_list->ai_family, host_info_list->ai_socktype, 

host_info_list->ai_protocol);

if (socketfd == -1) cout << "socket error " ;

else

{

cout << "Connect()ing..."  << std::endl;

//int status;

status = connect(socketfd, host_info_list->ai_addr, host_info_list-       >  ai_addrlen);

if (status == -1)  cout << "connect error" ;

else

 {

 cout << "connection successful"<<endl;

    freeaddrinfo(host_info_list);

    close(socketfd);

}

 }}}}

 return 0;
 }