终止while（cin >> s）循环。 加速的C ++

Question

I almost sure this question had been ask, but after a long search I still can't find the answer. I extracted this piece of code from Accelerated C++, and I have a problem with terminating the while loop. Code is here:

#include <iostream>
#include <vector>

using namespace std;

istream& read(istream& in, vector<double>& vec)
{
    cout << "start reading" << endl;
    if (in) {
        vec.clear();
        double x;
        while (in >> x) {
            cout << "x=" << x << endl;
            vec.push_back(x);
        }
        in.clear();
    }
    cout << "end reading" << endl;
    return in;
}

int main() {
    vector<double> vec;
    read(cin, vec);
    return 0;
}

I input 1 2 3 4 5 type EOF (Ctrl-D on MacOS) the program does not terminate. I can continue typing values into the vector:

start reading
1 2 3 4 5 x=1
x=2
x=3
x=4
x=5


5
x=5
6
x=6
7
x=7

The closest question I found here: http://www.cplusplus.com/forum/beginner/49993/

Answer 1

Ok the problem was that in mac I should do the following: press ctrl-D to signal and end to stdin, and then the enter key to return the buffer. More: https://discussions.apple.com/thread/2361809