#include <iostream>
#include <string>
#include "stack.h"
#include "calculator.h"
using namespace std;


int main()
{
	Calculator mycalc;
	mycalc.clear();
	mycalc.add(4.52);
	mycalc.add(3.789);
	mycalc.divide(2.6);
	mycalc.multiply(3.12);
	mycalc.subtract(2.678);
	cout << mycalc.display() << endl;       // prints out "7.2928"
	mycalc.clear();
	mycalc.add(5.0);
	cout << mycalc.display() << endl;       // prints out "5"

	//advanced stuff #1: add a constructor
	Calculator calc1;
	cout << calc1.display() << endl;  //prints out 0

	//advanced stuff #2: add a parameterized constructor
	Calculator calc2(5);
	cout << calc2.display() << endl; //prints out 5

	//advanced stuff #4 (10 points extra credit): Create an 'undo' method for the calculator
	mycalc.undo();
	mycalc.undo();
	cout << mycalc.display() << endl;  //prints out 7.2928
	mycalc.undo();
	mycalc.undo();
	cout << mycalc.display() << endl;


	return 0;
}