Design and test a reference array, Data Structure & Algorithms

Instructions

  • Design and test a reference array. Reference array stores the references to user supplied objects of different types. Just think it as a heterogeneous array which can contain elements of different types.
  • Exceptions must be used to handle all type of errors that may be encountered while using the array. The main errors are:
    • No object is found while trying to access an object from the array at a given position
    • The index may be beyond the array limits.
  • The necessary classes for the problems and also the driver main function are given. You have to provide the implementations of the member functions whose actual code is missing.

// ArrayImp.h

#include

#include

enum SortOrder { Asc, Desc};

class ArrayImp{

                protected:

                                size_t  size;

                                void ** vp;

                                ArrayImp( size_t sz);

                                ArrayImp( const ArrayImp& cp);

                                ~ ArrayImp();

                                ArrayImp& operator=(const ArrayImp & cp);

                                void * Get( size_t  index);

                                void * Put(size_t  index, const void * what);

                                void Print() const;

};

ArrayImp:: ArrayImp(size_t sz){

                if (sz > 0){

                                size = sz;

                                vp = new void* [size];

                                for ( int I = 0; I < size; i++)

                                                vp[i] = 0;

                }else{

                                vp = 0;

                                size 0;

                }

}

ArrayImp:: ArrayImp( const ArrayImp& cp){

                if ( cp.size > 0){

                                size = cp.size;

                                vp = new void * [size];

                                for ( int I = 0; i< size; i++)

                                                vp[i] = cp.vp[i];

                } else{

                                size = 0;

                                vp = 0;

                }

}

ArrayImp&  ArrayImp ::operator=(const ArrayImp & cp){

                                //  your responsibility

}

void * ArrayImp:: Get( size_t  index){

                return  vp[index];

}

void * ArrayImp:: Put(size_t  index, const void * what){

                void * oldVal = vp[index];

                vp[index] = const_cast (what);

                return oldVal;

};

void * ArrayImp:: ArrayImp:: Print() const{

                cout<<"Contents:"<

                for ( int I = 0; i< size; i++)

                                cou<

                cout<

};

// AExection.h

class  ArrayException{

                private:

                                size_t  index;                        // index causing exception

                public

                                ArrayException(size_t  pos){ index = pos;}

                                virtual const char * GetDescription() const = 0;

                                size_t   GetExceptionIndex() const{

                                                return index;

                                }

};

class NoObjectException: public ArrayException{

               public:

                                NoObjectException( size_t  pos): ArrayException(pos){}            

                                const char * GetDescription() const {

                                                return "ERROR: No object at the specified index position";

                                }

};

class RangeException: public ArrayException{

               protected:

                                size_t    size;

                public:

                                RangeException( size_t  pos, size_t   aSize): ArrayException(pos), size(aSize){}      

                                const char * GetDescription() const {

                                                 return "ERROR: Index out of bound";

                                }

                                size_t  GetArraySize() const { return  size;}

}

// SafeArray.h

#include

#include< ArrayImp.h >

#include< AExection.h>

const size_t  MAX = 256;

template

class SafeArray: private  ArrayImp{

                public:

                                SafeArray ( int sz = MAX);

                                SafeArray( const SafeArray & cp);

                                SafeArray & operator=(const SafeArray & cp);

                                ~ SafeArray();

                                int GetSize(){ return size;}

                                T& Get(size_t  pos) throw (NoObjectException, RangeException);

                                T& Put(size_t  pos, const T & thisObj) throw (RangeException);

                                T& operator[](size_t  index);

                                void Print() const;

};

// main driver program

#include

#include

#include< ArrayImp.h >

#include< AExection.h>

#include

int main(){

                SafeArray x(10), y(10);

                int  a= 10, b = -100;

                x.Put(0,a);

                x.Put(1,b);

                x.Print();

                x[1] = x[0];

                y = x;

                y.Print();

                try{

                                x[11] = x[3];

                }

                catch(const NoObjectException & exp){

                                cout<<"Caught: NoObjectException Exception"<

                                cout<<"Index Error : " <

                };

                catch(...){

 

                                cout<<"Caught an Exception<

                };

                cout<<"Trying to access beyond arrya limit"<

                try{

                                x[11] = x[12];

                }

                catch(const ArrayException& exp){

                                cout<<

                                cout<<"Index Error : " <

                };

                catch(...){

                                 cout<<"Caught an Exception<

                };

                return 0;

}

Posted Date: 2/26/2013 4:08:15 AM | Location : United States







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