Thread: Array question - confused by answer

Hello All,

I recently took a quiz and I am confused by the correct answer. Can someone please explain the answer to me? Thank you so much!

You have two arrays named b and c. You call a static method that swaps the value in component k of one array with the value in component k of the other array. This swap method does not mention any variable declared outside the method except its parameters. Which of the following method calls could possibly accomplish this?

Correct answer: swap (c, b, k);

Any help would be appreciated. Thanks!

Do you see how swap() might have been implemented so that it can be called with swap(c,b,k)?

Presumably the other options did not send swap() enough (or the right kind of) "information" for it to do its job. For example it is vital that swap() have the parameter k - it is not enough to send it the values c[k] and b[k]. Again, trying to implement something called with swap(c[k], b[k]) will help reveal why.

Thank you so much for clearing that up for me!