Problems with pointer arithmetic (C)

Pubblicato il: 14 luglio 2016
sul canale di: Jacob Sorber
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Students often get their pointer arithmetic wrong because they forget that the type of the pointer determines the offset.

So...

p + 2

...really means give me the address that is (2+sizeof(whatever p is supposed to point to)) bytes past p.

If p is an (int *) then p + 2 is going to be (2 * sizeof(int)) bytes past p.





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