Как заполнить vector с клавиатуры?

nt n;
std::vector< int > a;
cin >> n;
int buffer;
 
for (int i = 0; i < n; i++){
    getline(cin, buffer);
    a.push_back(buffer);
}

#include <iostream>
#include <vector>
 
int main()
{
    int num;
    std::vector<int> ivec;
    std::cout << "Please enter sequence of an integers (to quit press q):\n";
    while(std::cin >> num)
        ivec.push_back(num);
    std::cout << "\nThis is your sequence: ";
    for (auto x : ivec)     // нужна поддержка стандарта C++11
        std::cout << x << " ";
 
    return 0;
}

#include <iostream>
#include <iterator>
#include <algorithm>
#include <vector>
 
int main()
{
    typedef std::istream_iterator<int> in_it;
    typedef std::ostream_iterator<int> out_it;
    std::vector<int> v;
    std::cout << "Please enter sequence of an integers (to quit press q):\n"; // вот эту
    std::copy(in_it(std::cin), in_it(), std::back_inserter(v));
    std::copy(v.begin(), v.end(), out_it(std::cout, " "));
}

std::cout << "Please enter a sequence of integers (press q to quit):\n";

#include <iostream>
#include <vector>
#include <iterator>
 
using namespace std;
 
int main(){
  cout << "Please enter a sequence of integers (press q to quit):\n";
  vector<int> v(istream_iterator<int>(cin),{});
  for (const auto &i:v) cout << i <<"\n";
}

#include <iostream>
#include <vector>
#include <string>
using namespace std;
int main()
{
    string del;
    vector<string> h;
    while (cin >> del) h.push_back(del);
        for(int i = 0; i < h.size(); i++) cout << h[i] << " ";
}

#include <iostream>
#include <vector>
#include <string>
 
using namespace std;
 
int main()
{
    string del;
    vector<string> h;
    while (cin >> del && del != "exit") h.push_back(del);
    for (int i = 0; i < h.size(); i++) cout << h[i] << " ";
}

#include <iostream>
#include <vector>
#include <string>
#include <cstdio>
 
using namespace std;
 
int main()
{
    string del;
    vector<string> h;
    while (cin >> del && del.back() != EOF) h.push_back(del);
    for (int i = 0; i < h.size(); i++) cout << h[i] << " ";
}