Delete pointer to multidimensional array in class through another pointer - how?

Question

I have a pointer to a class, that have a pointer to a multidimensional array but I can\'t seem to delete it from memory when I need to or set it to NULL.

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Answer 1

Depends on your allocation of pArray[i][j]. If it's something like pArray[i][j] = new int; then call delete Pointer_To_TestClass->pArray[0][0];. If it's something like pArray[i][j] = new int[10] then use your second option, delete[] Pointer_To_TestClass->pArray[0][0];. I'd also highly recommend immediately following the delete with setting it to NULL and proceeding it with the check for NULL.

The third one did not compile for me delete[][] Pointer_To_TestClass->pArray[0][0]; I got the error

Line 34: error: expected primary-expression before '[' token compilation terminated due to -Wfatal-errors.

Also, I'd highly recommend having those deletes in the destructor. Other places may be fine as well.

You may find the typedef of int* to be helpful for readability understanding you have a two-dimensional array of int*.