// Calculator.cpp : Defines the class behaviors for the application.
//

#include "stdafx.h"
#include "Calculator.h"
#include "CalculatorUI.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

/////////////////////////////////////////////////////////////////////////////
// CCalculatorApp

BEGIN_MESSAGE_MAP(CCalculatorApp, CWinApp)
	//{{AFX_MSG_MAP(CCalculatorApp)
		// NOTE - the ClassWizard will add and remove mapping macros here.
		//    DO NOT EDIT what you see in these blocks of generated code!
	//}}AFX_MSG
	ON_COMMAND(ID_HELP, CWinApp::OnHelp)
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CCalculatorApp construction

CCalculatorApp::CCalculatorApp()
{
	// TODO: add construction code here,
	// Place all significant initialization in InitInstance
}

/////////////////////////////////////////////////////////////////////////////
// The one and only CCalculatorApp object

CCalculatorApp theApp;

/////////////////////////////////////////////////////////////////////////////
// CCalculatorApp initialization

BOOL CCalculatorApp::InitInstance()
{
	AfxEnableControlContainer();

	// Standard initialization
	// If you are not using these features and wish to reduce the size
	//  of your final executable, you should remove from the following
	//  the specific initialization routines you do not need.
	
#ifdef _AFXDLL
	Enable3dControls();			// Call this when using MFC in a shared DLL
#else
	Enable3dControlsStatic();	// Call this when linking to MFC statically
#endif
	
	CCalculatorUI dlg;
	m_pMainWnd = &dlg;
	int nResponse = dlg.DoModal();
	if (nResponse == IDOK)
	{
		// TODO: Place code here to handle when the dialog is
		//  dismissed with OK
	}
	else if (nResponse == IDCANCEL)
	{
		// TODO: Place code here to handle when the dialog is
		//  dismissed with Cancel
	}

	// Since the dialog has been closed, return FALSE so that we exit the
	//  application, rather than start the application's message pump.
	return FALSE;
}

//////////////////////////////////////////////////////////////////////
// Calculator Class
//////////////////////////////////////////////////////////////////////

//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////

Calculator::Calculator()
{
	buffer1.init();
	buffer2.init();
	buffer3.init();
}

Calculator::~Calculator()
{

}

void Calculator::plus(CString x,CString y,CString &z,BOOL &overflow)
{
	buffer1 = x;
	buffer2 = y;
	
	buffer3 = buffer1.plus(buffer2,overflow);

	buffer3.toString(z);
}

void Calculator::minus(CString x,CString y,CString &z,BOOL &overflow)
{
	buffer1 = x;
	buffer2 = y;
	
	buffer3 = buffer1.minus(buffer2,overflow);

	buffer3.toString(z);
}

void Calculator::multiply(CString x,CString y,CString &z,BOOL &overflow)
{
	buffer1 = x;
	buffer2 = y;
	
	buffer3 = buffer1.multiply(buffer2,overflow);

	buffer3.toString(z);
}

void Calculator::divide(CString x,CString y,CString &z,BOOL &overflow)
{
	if (y.Compare("0") == 0) {
		z = "overflow";
		overflow = TRUE;
		return;
	}

	buffer1 = x;
	buffer2 = y;
	
	buffer3 = buffer1.divide(buffer2,overflow);

	buffer3.toString(z);
}

