//
// Program to test stack class.
// (This file is meant to be #include'd by another file that
//   uses a "typedef XXXX stacktype" to set the type of items
//   in the stack.)
//
// Program is driven by command input:
//   P x -- push x onto stack.
//   p -- pop top element from stack.
//   t -- print top element of stack.
//   s -- print size of stack and whether empty.
//   c -- test copy constructor by creating a copy of the
//          current stack and (destructively) printing the
//          copy. 
//   a -- test assignment by creating stack with one element,
//          using '=' to replace it with current stack, and
//          (destructively) printing the new stack.
//   end-of-file to quit
// Lines beginning "#" are ignored.
//

#include <iostream.h>
#include <stdlib.h>
#include "stack.h"

void printAndDestroy(stack<stacktype> & s1)
{
  while (!s1.empty()) {
    cout << s1.top() << endl;
    s1.pop();
  }
  return;
}

int main()
{
  stack<stacktype> s1;

  char cmd;
  char prompt[] = "Command?  ";

  cerr << prompt;
  while (cin >> cmd)
    {
      if (cmd == '#') 
	cin.ignore(10000,'\n');
      if (cmd == 'P') {
	stacktype elem;
	cin >> elem;
	s1.push(elem);
      }
      else if (cmd == 'p')
	s1.pop();
      else if (cmd == 't')
	cout << "top element = " << s1.top() << endl;
      else if (cmd == 's') {
	cout << "size of stack = " << s1.size() << endl;
	if (s1.empty())
	  cout << "stack is empty\n";
	else
	  cout << "stack is not empty\n";
      }
      else if (cmd == 'c') {
	stack<stacktype> s1copy(s1);
	cout << "copy of stack, made with copy constructor:\n";
	printAndDestroy(s1copy);
      }
      else if (cmd == 'a') {
	stack<stacktype> s1copy;
	s1copy.push(s1.top());
	s1copy = s1;
	cout << "copy of stack, made with assignment:\n";
	printAndDestroy(s1copy);
      }
      cerr << prompt;
    }
  cerr << endl;

  cout << "\nThat's all, folks!\n";
  return EXIT_SUCCESS;
}