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Please explain peculiar instantiation of class

Posted on 2013-06-12
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Last Modified: 2013-06-12
Please see question in attached file.
peculiar-class-instantiation.txt
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Question by:naseeam
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jkr earned 2000 total points
ID: 39241560
The line

contArr = new ContainerObject * [totalCapacity];

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looks a bit confusing, but if you break that down for readability (and consider the rest of the code), it is just allocating an array of pointers, i.e.

contArr // declared as 'ContainerObject **'
 = new 
ContainerObject * // the space makes this confusing
[totalCapacity]; // size of the array

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by:naseeam
ID: 39241676
Please confirm that class ContainerObject is not getting instantiated in the following statement:

contArr = new ContainerObject* [totalCapacity];
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by:jkr
jkr earned 2000 total points
ID: 39241690
No, the class itself isn't instantiated in that line. What is done here is that an array of the size 'total'Capacity' is allocated which consist of pointersto 'ContainerObject', i.e. 'ContainerObject*'. No single 'ContainerObject' constructor will be called
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by:naseeam
ID: 39241712
very well short explanation.  To the point.  The quesetion got answered.
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