no member named line in std

Hi , I'm trying to write on file but here is a problem : where there is get line(input.line)) , Xcode return me an error : no member named 'line' in std::_1::basic_ifstream<char,std::_1::char_traits<char>>'. Can you help me ? Thanks

#include <iostream>

#include <fstream>

#include <string>

usingnamespacestd;

using std::ofstream;

using std::ifstream;

using std::string;

int main()

{

string line ;

cout<<" Cosa vorresti scrivere sul file ? "<<endl;

ofstream output;

output.open("myfile.txt");

while( line != "exit"){

output<<line<<endl;

cin>>line;

}

output.close();

cout<<"Ho scritto sul file !"<<endl<<endl;

cout<<"Contenuto file:"<<endl;

ifstream input;

input.open("myfile.txt");

while (getline(input.line)){

cout<<line<<endl;

}

input.close();

return 0;

}