没有 STL 容器的迭代器

Question

At first sorry about my English. I m preparing for my exam and I need to practice iterators, that don t work with containers. I would like to input some symbols right to the symbol like '\n' and I have no clue how can I do that. The problem is I am not able to stop entering symbols. Hope you can help me. Sincerely thank you!

#include <iostream>
#include <iterator>
#include <algorithm>
#include <fstream>
using namespace std;
int main()
{
    ofstream out("name.txt");
    istream_iterator<char> it(cin);
    istream_iterator<char> end_of_stream;
    ostream_iterator<char> fout(out, " ");
    copy (it, end_of_stream, fout);
}

Answer 1

There's no algorithm to copy until you get a particular value (I think) so instead you have to write your own loop.

Like this

while (it != end_of_stream && *it != '\n')
{
    fout << *it;
    ++it;
}