Memory not being freed as expected when using pointers

Hello everyone,

I am trying to write a template class but I get a memory leak. The class is as follows:

template <class T> class Cvector{

    public:
	Cvector(){//pass initial parameters
	    sizeOfStream=0;
	    oldstream=new T;
	    stream=new T;
	}

	void addData(T *dataIn, unsigned int size){//main function of class
	    stream=new T[sizeOfStream+size];
	    for (unsigned int i=0;i<sizeOfStream;i++) stream[i]=oldstream[i];
	    for (unsigned int i=0;i<size;i++) stream[sizeOfStream+i]=dataIn[i];
	    sizeOfStream+=size;
	    oldstream=new T[sizeOfStream];
	    for (unsigned int i=0;i<sizeOfStream;i++) oldstream[i]=stream[i];
	}

	unsigned int size(){//return the size of the array
	    return sizeOfStream;
	}

	void clear(){//flush values
	    delete[] stream;
	    delete[] oldstream;
	    sizeOfStream=0;
	}

	T *data(){//retrieve the array
	    return stream;
	}

    private:
	T *stream;
	T *oldstream;
	unsigned int sizeOfStream;
};

Now, when I do something along the lines of

Cvector<double> derp;
double *hurr=new double[1024];
for (int i=0;i<1024;i++) hurr[i]=i;
for (int i=0;i<1000;i++) derp.addData(hurr,1024);

it crashes because it runs out of RAM.

As you can see, what I am trying to do is make something similar to std::vector, but make it so that it accepts arrays of data, as opposed to the simple push_back(). If I try to call Cvector::clear() when I am done adding data, it doesn't free the memory.

How can I fix this memory leak problem?

Thank you.


Regards,
Mr_Cloud