C / C++ / MFC

#include <iostream>
#include <vector>
using namespace std;

int main()
{
  vector <int> v;

  v.push_back(1);
  v.push_back(2);
  v.push_back(3);

  cout << "v-front " << v.front() << "\n";
  cout << "v-back " << v.back() << "\n";

  v.insert(v.begin(), 4); // insert '4' before the first item: now '4' is the new front of 'v'

  cout << "v-front " << v.front() << "\n";

  v.insert(v.end() - 1, 5); // insert '5' just before the last item (back) of 'v', now '5' is the second-last item of 'v'

  v.insert(v.end(), 6); // insert '6' just before the 'pass-the-end' of 'v', that is '6' is the new back of 'v'.

  for (auto x : v) // show, in order, all 'v' items
    cout << x << " ";
  cout << "\n";
}

Victor Nijegorodov wrote:

What is it?

charlieg wrote:

What am I missing?

std::vector<char*>* pMyvec = new std::vector<char*>(); // a pointer to a vector of pointers.
// use push_back to fill the vector with pointers:
pMyvec->push_back("A string");
pMyvec->push_back("Another string");

// pass the vectro to a function:
int result = myfun(pMyvec);
// on return the contents may have been changed