Question

How do i Overload the & operator to concatenate two arrays?, so elements from both arrays will be seen

Below is code i have so far. everything works except the operator overload of &. The & operator only works when both array are equal, first array smaller then second, fails when first array is the largest.

class smartArray{
public:
int *elements; // dynamic array, memory is allocated in the constructor. Use *this to access size member.
int length(); // returns the length of the array
smartArray(); // default constructor, sets size to 0
smartArray(int size); // constructor, allocates the memory for *elements, if size==0, then no memory allocation is done
~smartArray() ;// destructor
void resize(int newsize) ; // resizes array
bool operator==(const smartArray &another_point) ; // overloads == operator
bool operator!=(const smartArray &another_point) {
return !((*this)==another_point);
}
int& operator[] (const int index);
smartArray(smartArray &); // copy constructor

smartArray operator&(const smartArray & );
smartArray operator+(const smartArray & );
smartArray operator*(const smartArray & );
smartArray operator/(const smartArray & );
smartArray operator-(const smartArray & );
private :
friend ostream& operator<<(ostream &, smartArray &);
friend istream& operator>>(istream &, smartArray & );
int size ;
};

smartArray smartArray :: operator&(const smartArray& a ) { // overlaods concatenation of arrays, checks for size of arrays
int i,m,n;
n=size m=size>a.size?size:a.size;
int q=m+n;
smartArray c(q);
if(size< a.size){ // functions make array of elements from previous arrays
for ( i = 0 ; i < n ; i++)
c.elements[i]= elements[i];
for ( i = 0 ; i < q ; i++)
c.elements[n+i]=a.elements[i];
} else
for ( i = 0 ; i < n ; i++){
c.elements[i]= a.elements[i];

for ( i = 0 ; i < q ; i++)
c.elements[n+i]=elements[i];
}
return c;
}

Answer 1

c++ code after removing error

---------------------------------------------------------------------------------------------------------------------------------------------------------

#include<iostream>

using namespace std;

class smartArray{

public:

int *elements; // dynamic array, memory is allocated in the constructor. Use *this to access size member.

int length(); // returns the length of the array

smartArray() // default constructor, sets size to 0

{

size=0;

}

smartArray(int siz) // constructor, allocates the memory for *elements, if size==0, then no memory allocation is done

{

size=siz;

}

void input();

void dis();

//~smartArray() ;// destructor

//void resize(int newsize) ; // resizes array

//bool operator==(const smartArray &another_point) ; // overloads == operator

//bool operator!=(const smartArray &another_point) {

//return !((*this)==another_point);

//}

//int& operator[] (const int index);

//smartArray(smartArray &); // copy constructor

smartArray operator&(const smartArray & );

//smartArray operator+(const smartArray & );

//smartArray operator*(const smartArray & );

//smartArray operator/(const smartArray & );

//smartArray operator-(const smartArray & );

private :

//friend ostream& operator<<(ostream &, smartArray &);

//friend istream& operator>>(istream &, smartArray & );

int size ;

};

smartArray smartArray :: operator&(const smartArray& a ) { // overlaods concatenation of arrays, checks for size of arrays

int i,m,n;

n=size ;

m=a.size;

int q=m+n;

smartArray c(q);

// allocate meomry dynamic

c.elements=new int[q];

if(size< a.size){ // functions make array of elements from previous arrays

//cout<<"if part";

for ( i = 0 ; i < n ; i++)

c.elements[i]= elements[i];

for ( i = 0 ; i < m ; i++)

c.elements[n+i]=a.elements[i];

}

else

{

//cout<<"else part";

for ( i = 0 ; i < m ; i++)

c.elements[i]= a.elements[i];

for ( i = 0 ; i < n ; i++)

c.elements[m+i]=elements[i];

}

return c;

}

int main()

{

int n;

// input from user

cout<<"Enter numbers of elemets to store in array 1: ";

cin>>n;

smartArray ob1(n);

ob1.input();

cout<<"Enter numbers of elemets to store in array 2: ";

cin>>n;

smartArray ob2(n);

ob2.input();

smartArray ob3;

ob3=ob1&ob2;

ob3.dis();

}

void smartArray::input()

{

elements =new int[size];

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

{

cin>>elements[i];

}

}

void smartArray::dis()

{

int i;

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

{

cout<<elements[i]<<"\t";

}

}

-------------------------------------------------------------------------------------------------------------------------------------------------------

Output

CAUsers satsahib Documents operator overloading 3.cpp [Executing) - Dev-C++5.11 File nter numbers of elemets to store in array 1: 4 Pro nter numbers of elemets to store in array 2: 3 rocess exited after 6.65 seconds with return value ress any key to continue . compiler % Resources ilh compile Log V. Debug @ Find Results a Close - Warnings: d - Output Filename: C:Users\satsahiblDocumentsloperator_overloading 3.exe - Output Size 1.83399105072021 MiB - Compilation Time: 1.16s Shorten compiler poths Line: 48 Col: 3 Sel: 0 Lines: 109 Length: 2349 Insert Done parsing in 0.016 seconds 6:58 AM Type here to search 4* 4/7/2018 3