C++ Lab13 String Permutation

#include <iostream>
#include <vector>
#include <string>
#include <sstream>
#include <algorithm>
#include <iterator>

using namespace std;

void printVector(std::vector<string> vec) {
    copy(vec.begin(), vec.end(), ostream_iterator<string>(cout, " "));
    cout << endl;
}

int main() {
    string userinput;
    int counter = 0;

    cout << "Enter text: ";
    getline(cin, userinput);

    stringstream ss(userinput);
    istream_iterator<string> begin(ss);
    istream_iterator<string> end;
    vector<string> vstrings(begin, end);
    cout << endl;

    sort(vstrings.begin(), vstrings.end());

    do {
        printVector(vstrings);
        counter++;
    } while (next_permutation(vstrings.begin(), vstrings.end()));

    cout << endl << counter << " Possible output." << endl;
    system("pause");
    return 0;
}