hi, I got a question, what does it mean when the * is used twice. for example ** what does that mean?

It dereferences the results of the previous dereference.

int a;int* pa = &a*pa == a;int** ppa = &pa*ppa == pa;**ppa == *pa == a;

*edit: Naturally, you can do this indefinately.

int*** pppa = &ppa*pppa == ppa;**pppa == *ppa == pa;***ppa == **ppa == *pa == a;

However, think long and hard if you ever find yourself needing more than two dereferences at a time. There's a chance something is more complicated than it needs to be.

CM