#include <vector>
#include <iostream>

using namespace std;

int main(void)
{
  vector<char> x;
  x.push_back('a');
  x.push_back('b');
  x.push_back('c');
  char* p = &(x[1]);
  cout << *p << endl;
  x[1] = 'x';
  cout << *p << endl;

  return 0;
}