Chapter 8 Help - Overriding The Dealloc Method

[JTMontana]

Hi,

I tried to override the dealloc method in my Rectangle class, everything seems to work fine until i release the Rectangle.  Any code after it is released is not executed and the program does not exit.  Not sure where I went wrong here.  See attachments for code.

Thanks,
JT

[skochan]

JT,

Look at your setOrigin: method: you are not copying the x, y coordinates of pt into origin.  Instead, you are assigning origin to point to the same (x,y) coordinate pair as the argument (pt) to the method (effectively losing the pointer to the newly allocated XYPoint object).  That's a complex topic, so let me know if you need further explanation, or read the stickied topic on Program 7.5-7.6 for a similar explanation applied to Fraction objects.

Cheers,

Steve Kochan

[JTMontana]

I see what I did now, I didn't realize that setting the two XYpoints equal to each other would only make them point to the same location in memory.  Everything is working smoothly now.

Thanks again,

JT