operator overrriding

Question

I have a class A that overload [] operator and class B inherited from A
B have different behaviour with this operator
ptotype in A
int& operator[](int index);
in B that U want
const int operator[](int index);

how to do this overload and avoiding override

2) can I make a member in A that is accessible outside except subclasses ?

thanks for helping

Answer 1

ok I will put my well then share if I felt

I appreciate your aid

Answer 2

ABADA S , i actually don't get your requirement. please check below code and let me know if you are looking for some different behaviour :

#include <iostream>
using namespace std;

class A
{
int array[5];
public :
A()
{
array [0] = 1;
array [1] = 2;
array [2] = 3;
array [3] = 4;
array [4] = 5;
}
int& operator[](int index);
};

class B : public A
{
int array[5];
public :
B()
{
array [0] = 11;
array [1] = 12;
array [2] = 13;
array [3] = 14;
array [4] = 15;
}
const int operator[] (int index );
};

int& A::operator[](int index)
{
return array[index];
}

const int B::operator[](int index)
{
return array[index];
}

int main()
{
A obja;
B objb;

int x = obja[2];
int y = objb[2];

cout << x << endl;
cout << y << endl;

return 0;
}

Answer 3

Ketan Lalcheta
in this code why did you declared and define outside ?
can you do it but define inside the classes? (your way is working thanks for it)

for the second question
I know something about it and how does it work , please give me an example 😊

Answer 4

I got a compile error when defining inside ... maybe I have problems in compiler

Answer 5

for your second question, you can have keyword friend... let me know if you need more details or example on friend class nd friend function

Answer 6

ABADA S you can define inside class as well.. I generally declare class in header file and define it into source cpp files so I did it same way in a single file..

refer below code for friend function:
https://code.sololearn.com/cJVcu6dzm5fU/?ref=app

Answer 7

try it on sololearn and share code link if you get error...