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What's the answer?

agile116
Greenhorn

Joined: May 01, 2004
Posts: 3

The answer after the self test is 15 15
but I'm not so sure about this. Can somebody tell me why? Thank you!

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[ July 19, 2004: Message edited by: Barry Gaunt ]
Barry Gaunt
Ranch Hand

Joined: Aug 03, 2002
Posts: 7729
Assuming that a[1] should be a1[1] the program outputs 15 15 when compiled and run. What did you expect to get?


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Thanks
-Barry


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Yan Lee
Ranch Hand

Joined: Sep 15, 2003
Posts: 94
The array object is created in the heap. The value of the address of the array object is passed to the fix() method. The value of an element is chaged in the method and the same address of the array object is returned back to the main method where it is assigned back to a2. So essentially a1 and a2 are pointing to the same array-object on the heap.


You have passed the address to the array object to the fix method


The first element of the array object now holds 7, so the modified array
holds {3,7,5} and you return back the address of the array. Both a1 and a2 point to the same array object on the heap.

So now when you add the elements of the array, it holds 3+7+5=15
 
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subject: What's the answer?