Frank Zhao - 2003-04-16

I'm compile follow code in dev-4.9.8.0 get some problem,but in succeed  in vc++ 7.0 . It's the sample code in "The c++ programming language (special edition)" (sec3.8.3):
#include <iostream>
#include <fstream>
#include <string>
#include <vector>
#include <algorithm>
using namespace std;       

int main()
{
    string from,to;
    cin>> from>>to;

    ifstream is(from.c_str());
    istream_iterator<string> ii(is);
    istream_iterator<string> eos;

    vector<string> b(ii,eos);
    sort(b.begin(),b.end());

    ofstream os(to.c_str());
    ostream_iterator<string> oo(os,"\n");

    unique_copy(b.begin(),b.end(),oo);

return !is.eof()||!os;

}

The compile message is "14 D:\c++\test.cpp
`istream_iterator' undeclared (first use this function)"

Can anyone explain this. thanks!