creating an object from another class

[restive falcon]

I need help with this error so this code is supposed to create a pointer variable of type SelectionAlgorithm then initialize the pointer by creating an object of class AlgorithmSortHeap but I get this error and I dont know what im doing wrong

[graceful atlas]

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[fleet cloak]

I don't get what you are trying to do.
You can't assign a pointer of incompatible types

[restive falcon]

um so there is supposed to be 3 algorithm classes and all of them have select method in them and setalgorithm method is supposed to create an object of the selected class so that algorithm will be used

and this line were given to us like this so
this->algorithm = new AlgorithmSortHeap(k);

I dont get whats wrong

[bitter solstice]

I think you are attempting assignment of a polymorphic type.
To understand what is going wrong we need to see more code.

We need to see:
a) the declaration of variable TestBed::algorithm
b) the declaration of class AlgorithmSortHeap

[restive falcon]

yeah I am

this is algorithmsortheap

but I dont have algorithm in testbed

[bitter solstice]

You must have

this->algorithm = new AlgorithmSortHeap(k);

What is TestBed::algorithm?

[bitter solstice]

Show us the header file, please.

[graceful atlas]

```cpp
int main() {
return 0;
}
```

[restive falcon]

do you mean this?

[bitter solstice]

Yep, as suspected.
Your AlgorithmSortHeap is not a kind of SelectionAlgorithm.
There is no inheritance there, so no polymorphism.

[restive falcon]

what

how do I fix that

[pale flame]

well you could just inherit

but I would recommend Concepts instead if you're allowed to use them

[graceful atlas]

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