#include <stream.h>
#include <String.h>

// ~cps330/Examples/Stack_II.C
// Create a stackint  class with member functions - add error checking

#define MAX 10

class Stackint {
  private:
    int top;
    int values[10];

  public:  
    Stackint() { top=0; cout <<"I am being constructed...\n"; }
    ~Stackint() { cout <<"I am being destructed...\n"; }

    int depth() { return top; } ;

    void push(int i) {
      if ( top >= 10 ) {
        cout << "Error, stack overflow\n";
      } else {
        values[top++] = i;
      }
    } // End push

    int pop() {
      int retval = 0;
      if ( top <= 0 ) {
        cout << "Error, stack underflow\n";
      } else {
        retval = values[--top];
      }
      return retval;
    }

    void print() {
      int i;
      cout << "Stack contents:\n";
      for(i=top-1; i>=0; i-- ) cout << values[i] << "\n";
    }

};  // End of the class

main() {

  String str;
  int i;
  Stackint stuff;

  while(1) {
    cout << "Enter a command (" << stuff.depth() << ") :";
    cin >> str;
    if ( cin.eof() ) break;

    if ( str == "push" ) {
      cin >> i;
      cout << "Pushing " << i << "\n";
      stuff.push(i);
    } else if ( str == "print" ) {
      stuff.print();
    } else if ( str == "pop" ) {
      cout << "Popping " << stuff.pop() << "\n";
    } else if ( str == "quit" ) {
      break;
    } else {
      cout << "Error, please enter push, pop, quit, or print\n";
    }
    
  } // End while

  cout << "Thanks for playing\n" ; 

}