question about using "this"

[cartpauj]

I have a class called Period and inside of it two functions, one called Sub() and another called IsGreater(): They are called in the form

z = a.Sub(b) //subtract b from a return result
if (c.IsGreater(d)) //if c is greater than d return true 

My question is, I'm trying to call IsGreater inside of Sub but I cannot figure out how to use "this" work.

I want:
Period Sub(Period b)
{
Period temp;

if (this.IsGreater(b)) //where this should refer to Period a
{
//DO STUFF
}
return temp;
}

[Disch]

'this' is a pointer, so you would use the -> operator instead of the . operator.

if(this->IsGreater(b))
{
  // ...
}

But of course.. the 'this' is implied when you call it from another member function. So you can just leave it out entirely:

if(IsGreater(b))

[cartpauj]

THANKS A MILLION!