istream_iterator 和 ostream_iterator

C++ primer code learning
binds standard input cin through istream_iterator and
binds standard output cout through ostream_iterator

#include <iterator>
using std::istream_iterator;
using std::ostream_iterator;

#include<vector>
using std::vector;

#include<iostream>
using std::cin;
using std::cout;
using std::endl;

int main(int argc, char const *argv[])
{
    
    
    vector<int> vec;
    istream_iterator<int> in_iter(cin);
    istream_iterator<int> eof;		//结束符

    while (in_iter != eof)
    {
    
    
        vec.push_back(*in_iter);
        in_iter++;
    }
    ostream_iterator<int> out_iter(cout, " ");

    for(auto e : vec)
        out_iter = e;
    cout << endl;

    system("pause");   
    return 0;
}

这个地方有个小坑：
The input is of type int: when entering the while loop input through cin, the end of the data or the next line must be typed: Ctrl + Z and press Enter and line feed to end; the
input is of string type: when entering the while loop input through cin, the next line of data , type: Ctrl + Z and press Enter and line feed to end;

Input is string type

Input is string type