Generic Classes in C

Question

Generic Classes was the topic I was reading. I at one point became immobile. 

Here is the relevant code:

template <class StackType> class stack
{
    StackType stck[10];
    int tos;
public:
    stack() {tos=0;}
    void push(StackType ob);
    StackType pop();
};

My question is that in template <class StackType> class stack, there are two classes made (StackType and stack)?

I mean how does the compiler treat this as like making stack a nested class of StackType or something else?