how to create a pointer array of strings where each element points to another element in const array

garbage.cpp

#include <string>
using namespace std;

const string data[] = {
                        "A1,string1",
                        "A2,string2",
                        "A3,string3",
                        "A4,string4",
                        "A5,string5",
                        "A6,string6",
                        "A7,string7",
                        "A8,string8",
                      };

int parse_data()
{
  int     num_elements      = 0;
  for ( unsigned int i = 0; data[i].length(); i++ ) num_elements++;

  string *ptrarray[num_elements];

  for ( int i = 0; i < num_elements; i++ )
  {
    ptrarray[i] = &data[i];
  }

  return 0;
}