#include <iostream>
//Reverse a string with a ch_stack.

int main()
{
  ch_stack  s;
  char  str[max_len] = { "My name is Don Knuth!"};
  int  i = 0;
         
  cout<< str << endl;
  s.reset(); //s.top = EMPTY;would be illegal
  while (str[i])
    if (!s.full())
      s.push(str[i++])
    else
      break;
  while (!s.empty())   //print the reverse
    cout << s.pop();
    cout << endl;
  return 0;
}