fractioninstruction.h

Trolltech公司发布的图形界面操作系统。可在qt-embedded-2.3.10平台上编译为嵌入式图形界面操作系统。

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**
** This file is part of the Qtopia Environment.
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** under the terms of the GNU General Public License as published by the
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#ifndef CALC_FRACTION_H
#define CALC_FRACTION_H

#include <qtopia/calc/instruction.h>
#include <qtopia/calc/fractiondata.h>

//Fraction instruction base
class QTOPIA_EXPORT BaseFractionInstruction:public Instruction {
public:
    BaseFractionInstruction();
    ~BaseFractionInstruction(){};

    virtual void eval();
    virtual void doEval(FractionData *,FractionData *){};
    virtual void doEval(FractionData *){};
};

// Factory
class QTOPIA_EXPORT iFractionFactory:public Instruction {
public:
    iFractionFactory();
    ~iFractionFactory(){};
    void eval();
};

// Copy
class QTOPIA_EXPORT iFractionCopy:public BaseFractionInstruction {
public:
    iFractionCopy();
    ~iFractionCopy(){};
    void eval();
};

// Conversions
class QTOPIA_EXPORT iConvertDoubleFraction:public Instruction {
public:
    iConvertDoubleFraction();
    ~iConvertDoubleFraction(){};
    void eval();
};

// Mathematical functions
class QTOPIA_EXPORT iAddFractionFraction:public BaseFractionInstruction {
public:
    iAddFractionFraction();
    ~iAddFractionFraction(){};
    void doEval(FractionData *,FractionData *);
};

class QTOPIA_EXPORT iSubtractFractionFraction:public BaseFractionInstruction {
public:
    iSubtractFractionFraction ();
    ~iSubtractFractionFraction (){};
    void doEval(FractionData *,FractionData *);
};

class QTOPIA_EXPORT iMultiplyFractionFraction:public BaseFractionInstruction {
public:
    iMultiplyFractionFraction ();
    ~iMultiplyFractionFraction (){};
    void doEval(FractionData *,FractionData *);
};

class QTOPIA_EXPORT iDivideFractionFraction:public BaseFractionInstruction {
public:
    iDivideFractionFraction ();
    ~iDivideFractionFraction (){};
    void doEval(FractionData *,FractionData *);
};

class QTOPIA_EXPORT iNegateFractionFraction:public BaseFractionInstruction {
public:
    iNegateFractionFraction ();
    ~iNegateFractionFraction (){};
    void doEval(FractionData *);
};

#endif