Question

In the constructor of a class I have I create an array with the needed size like this:

ArrayClass::ArrayClass(int size) 
{
    Number* nmbr = new Number[size];
}

and

ArrayClass::ArrayClass()
{ 
    Number* nmbr = new Number[2];
}

I also have it specified in the header as

Number* nmbr;

While the creation of the array itself works I can’t seem to access it outside of the constructor. It seems like whenever I leave the constructor the variable gets freed from the memory. How do I prevent this so I can use the variable when calling the other functions in the class?

Answer 1

Try to declare the variable nmbr in the declaration of the class and not in the constructor.
Example:

class ArrayClass

{

private: 

Number *nmbr;

public:

ArrayClass();

ArrayClass(int size);

~ArrayClass()

}

ArrayClass::ArrayClass(int size) 

{

this->nmbr = new Number[size];

}

ArrayClass::ArrayClass() 
{

this->nmbr = new Number[2];

}

ArrayClass::~ArrayClass()
{

delete this->nmbr;

}