Two Object related question

[gflores]

How does one make an object null? I think in Java, one could merely do

anObject = null;

but I could be wrong. Basically, I have an array of objects and I want to delete one of the objects. I think null is the way to do it, no?

Secondly, I have this..

class EmpArys
{
	public:
		EmpArys();
		int findEmp(int pSocSecNbr);
		Employee getEmp(int pSocSecNbr);
		bool addEmp(Employee pEmp);
		bool delEmp(int pSocSecNbr);
		string toString();
		string getPayList(Tax pTaxTable);
	private:
		Employee empList[100];  //i've temporarily put 100 there
		int empCount;
		const int maxNumOfEmps, empNotFound;
};

I can't figure out how to instaniate empList to maxNumOfEmps and also to instantiate maxNumOfEmps to 100 and empNotFound to -1.
I can't instantiate them in the constructor because they are constant and not in the class either. Major help needed.

I tried this for instantiating the object in the constructors, which would work in Java (I think), but not in C++

 EmpArys::EmpArys()
{
empArys[maxNumOfEmps];
}

Thanks, I greatly appreciate the help.

[axon]

well, objects in java are a bit different that in c++. In Java you have low level types: int, char, but you also have Objects: Integer, String and so on.

In your case, you cannot just make an object of type EmpArys=null, you need you constructor, set all the object's variables.

[toysoldier]

Code:
EmpArys::EmpArys()
{
empArys[maxNumOfEmps];
}

I change it like this:

class newEmpArys::EmpArys()   //define another class
        : EmpArys
{
       empArys[maxNumOfEmps];
}

[hk_mp5kpdw]

Const data members need to be set in a class' initializer list. This is the only place they can be set upon creation of an instance of a particular object. The following modifications will allow you to create an EmpArys object with a value for maxNumOfEmps that you specify when instantiating an object. You can specify a value or not in which case a default value of 100 will be given. empNotFound gets set to -1.

class EmpArys
{
public:
        EmpArys(const int maxEmps);
        ~EmpArys();
        int findEmp(int pSocSecNbr);
        Employee getEmp(int pSocSecNbr);
        bool addEmp(Employee pEmp);
        bool delEmp(int pSocSecNbr);
        string toString();
        string getPayList(Tax pTaxTable);
private:
        Employee* empList;
        int empCount;
        const int maxNumOfEmps, empNotFound;
};

EmpArys::EmpArys(const int maxEmps = 100) : maxNumOfEmps(maxEmps), empNotFound(-1)
{
    // Dynamically allocate a chunk of memory to hold maxNumOfEmps Employees
    empList = new Employee[maxNumOfEmps];
}

EmpArys::~EmpArys()
{
    // Clean up dynamically allocated memory
    delete [] empList;
}
...
...
...
EmpArys a1;         // maxNumOfEmps for object a1 gets default value of 100
EmpArys a2(200);    // maxNumOfEmps for object a2 gets value of 200