StdPostFixEval.h

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#pragma once

namespace StdUtils
{
class STD_UTILS_PORT CStdPostFixEval  
{
protected:
        std::string m_strEquation;

        CStdArray<std::string> m_aryPostFix;

        CStdPtrArray<CStdVariable> m_aryVariables;

        CStdStack<double> m_aryStack;

        double m_dblSolution;

        void SavePostFixInArray(std::string &strEqu);
        void GetParams(double &dblLeft, double &dblRight, int iNumParams);
        CStdVariable *FindVariable(std::string strVarName);
        void FillInVariables(CStdArray<std::string> &aryPostFix);

public:
        CStdPostFixEval();
        virtual ~CStdPostFixEval();

        void AddVariable(std::string strVarName);
        void SetVariable(std::string strVarName, double dblVal);

        double Solution();

        void Equation(std::string strVal);
        std::string Equation();

        double Solve();
};

}                               //StdUtils