Thread: AString allocation

Hi

I have a class, with a private data member char *a. In the constructor, how can I allocate 20 bytes for char *a, and then set it to a parameter?

Code:

class A
{
      private:
         char *a;
};

A::A(char *b)
{
     //would like to allocate 20 bytes, and set b = a;
}

//desctructor
A::~A(void)
{   
     delete[] a;
}

Thanks