#include <stl.h>
#include <iostream.h>
#include <string.h>

bool str_compare (const char* a_, const char* b_)
{
  return ::strcmp (a_, b_) < 0 ? 1 : 0;
}

char* labels[] = { "aa", "dd", "ff", "jj", "ss", "zz" };

int main ()
{
  const unsigned count = sizeof (labels) / sizeof (labels[0]);
  if (binary_search (labels, labels + count, "ff", str_compare))
    cout << "ff is in labels." << endl;
  else
    cout << "ff is not in labels." << endl;
  return 0;
}