// PrefixCalculator.h: interface for the CPrefixCalculator class.
//
//////////////////////////////////////////////////////////////////////

#if !defined(AFX_PREFIXCALCULATOR_H__ABF70BC1_BCE4_11D9_ABF6_00E04C224917__INCLUDED_)
#define AFX_PREFIXCALCULATOR_H__ABF70BC1_BCE4_11D9_ABF6_00E04C224917__INCLUDED_

#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000
#include "expression.h"
#include "stack.h"
class CPrefixCalculator : public CStack<CExpression*>  
{
public:
	double Calculate(int  PreSchem[],char OperatorTable[], double OperandTable[],CString& strMidExpression);

	void initiate(int nLength);
	CPrefixCalculator();
	virtual ~CPrefixCalculator();
	int m_nState;
protected:
	void push(CExpression* pEx);
	void push(char cOperator);
	void push(double dblOperand);
	CExpression* pop();
	void Calculate();
	bool CanCalculate();
	void ClearStack();
	bool *m_pFlag;
	int   m_nFlagLength;
	int m_nExpressionLength;
	int m_nCur;

};

#endif // !defined(AFX_PREFIXCALCULATOR_H__ABF70BC1_BCE4_11D9_ABF6_00E04C224917__INCLUDED_)