How can i delete a pointer to array in C++

Question

I am wondering how can i use the delete operator if I want to delete an array initialized like this:

int (*my_ptr)[10] = new int[3][10];

This seems invalid:

delete[][]

delete[][] is invalid. Use delete[]. It will should call all destructors , as required. — NadavS
– NadavS, Commented Mar 30, 2020 at 14:17

eerorika · Accepted Answer · 2020-03-30 14:14:50Z

5

new int[3][10] is simply creation of a dynamic array whose elements are themselves arrays. This is deleted in the same way as all dynamic arrays: delete[].

answered Mar 30, 2020 at 14:14

eerorika

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eerorika Over a year ago

@asmmo That might be confusing since sub objects do not have static storage.

Bathsheba · Accepted Answer · 2020-03-30 14:22:11Z

4

my_ptr is an array of 3 elements. Each element is an int[10] type.

You call delete[] my_ptr; to delete those 3 elements.

edited Mar 30, 2020 at 14:22

answered Mar 30, 2020 at 14:15

Bathsheba

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eerorika Over a year ago

It's actually an array of 3 arrays of 10 elements. I got this wrong too first. It's strange, but the dynamic part is in the middle of the element type.

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