point24.h

symbian平台下的24点游戏编程 很适合初学者的例子

#ifndef POINT24_H
#define POINT24_H

#include <e32base.h>
#include <eikedwin.h> 

enum TPoint24Operator
    {
    EPoint24OperatorNone,
    EPoint24OperatorAdd,
    EPoint24OperatorSub,
    EPoint24OperatorMulti,
    EPoint24OperatorDiv
    };

enum TPanicCode
	{
	EPanicCode_ValueRange = 1,
	EPanicCode_NullPointer
	};
        	
class TValue
    {
    public: // Data
        TInt iValue;
        TPoint24Operator iOperator;
        TValue* iLeftChild;
        TValue* iRightChild;
    
    public: // Constructor
        TValue() 
            {
            iValue = 0;
            iOperator = EPoint24OperatorNone;
            iLeftChild= NULL;
            iRightChild = NULL;
            };
    };
    
class CPoint24: public CBase
    {
    public:
        static CPoint24* NewL();
        ~CPoint24();
        void CalculateL(TInt aValue1, TInt aValue2, TInt aValue3, TInt aValue4, CEikEdwin* aEditResult);
    protected: 
        CPoint24();
    private: // function
        TValue* Calculate(const TValue* aValue1, const TValue* aValue2, TPoint24Operator aOperator);
        void    CalculateL(TValue* aValues[], TInt aValueCount);
        void    AddResultL();
        TBool   GetResult(TValue* aValue, TPoint24Operator aUpperOperator, TDes& aBuf, TBool aIsLeftChild = ETrue);
        TBool   IsRightOrder(TValue* aValue, TPoint24Operator aOperator);
        TBool   IsNeedParenthesis(TValue* aValue, TPoint24Operator aUpperOperator, TBool aIsLeftChild);
    private: // Data
        TValue iOriginalValue[4];
        TValue iResultValue[3];
        CEikEdwin* iEditResult;
        TInt   iResultOffset;
        TInt   iResultCount;
    };
#endif