c++ stl 读文件

#include <iostream>
#include <fstream>
#include <iterator>
#include <list>
#include <errno.h>
#include <string.h>
using namespace std;

int main()
{
    ifstream inf("data.dat");

    if(inf)
    {
        istream_iterator<string> it(inf),end;
        list<string> ls(it,end);
        ostream_iterator<string> ot(cout," ");
        copy(ls.begin(),ls.end(),ot);
        cout<<endl;
        inf.close();
    }
    else
    {
        cerr<<strerror(errno)<<endl;
    }

    return 0;
}