// Printing a string one character at a time using
// a constant pointer to constant data -- must
// use array subscript notation
#include <iostream.h>

void printCharacters(const char * const);

main()
{
   char string[] = "print characters of a string";

   cout << "The string is:" << endl;
   printCharacters(string);
   cout << endl;
   return 0;
}

// In printCharacters, sPtr is a constant pointer 
// to a character constant.
// Characters cannot be modified through sPtr
// (i.e., sPtr is a "read-only" pointer).
// Must use array subscript notation to access elements.
// sPtr is just like a regular array name!
void printCharacters(const char * const sPtr)
{
  int i;
  for (i = 0; sPtr[i] != '\0'; i++)   // no initialization
      cout << sPtr[i];
}