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

// ~cps330/Examples/stack_I.C
// No class - direct implementation

#define MAX 10

main() {

  String str;
  int i;
  int top;
  int stack[MAX];

  top = 0;

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

    if ( str == "push" ) {
      cin >> i;
      cout << "Pushing " << i << "\n";
      stack[top++] = i;
    } else if ( str == "print" ) {
      cout << "Stack contents:\n";
      for(i=top-1; i>=0; i-- ) cout << stack[i] << "\n";
    } else if ( str == "pop" ) {
      cout << "Popping " << stack[--top] << "\n";
    } else if ( str == "quit" ) {
      break;
    } else {
      cout << "Error, please enter push, pop, or print\n";
    }
    
  } // End while

  cout << "Thanks for playing\n" ; 

}