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    <p>The first important piece of information is that parameters whose type is a (bounded or unbounded) array of <code>T</code> are transformed to pointers to <code>T</code>. I.e. both <code>int arr[]</code> and <code>int arr[10]</code> are transformed to <code>int * arr</code>. Note that the transformation is only performed on top-level arrays, i.e. it doesn't occur in <code>int (*arr)[10]</code>, which is a pointer to an array of int.</p> <p>Furthermore, things to the right of the identifier bind more closely than things to the left, i.e. <code>int *arr[10]</code> is an array, whereas <code>int (*arr)[10]</code> is a pointer.</p> <p>Lastly, arrays of and pointers to references are invalid, as are pointers and references to unbounded arrays.</p> <pre><code>1. void foo(int &amp;arr); // can't pass, reference to int 2. void foo(int &amp;arr[]); // invalid, pointer to reference to int 3. void foo(int (&amp;arr)[]); // invalid, reference to unbounded array of int 4. void foo(int &amp;arr[10]); // invalid, pointer to reference to int 5. void foo(int (&amp;arr)[10]); // can pass, reference to an array of int 6. void foo(int *arr); // can pass, pointer to int 7. void foo(int *arr[]); // can't pass, pointer to pointer to int 8. void foo(int (*arr)[]); // invalid, pointer to an unbounded array of int. 9. void foo(int *arr[10]); // can't pass, pointer to pointer to int 10. void foo(int (*arr)[10]); // can't pass, pointer to array of int 11. void foo(int arr[]); // can pass, pointer to int 12. void foo(int arr[10]); // can pass, same as above </code></pre> <p>Using <code>arr</code> as an argument to <code>foo</code> will cause it to decay to a pointer to its first element -- the value passed to <code>foo</code> will be of type <code>int *</code>. Note that you can pass <code>&amp;arr</code> to number 10, in which case a value of type <code>int (*)[10]</code> would be passed and no decay would occur.</p>
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    1. COThere are a lot of mistakes here. For example, #3 and #8 are invalid, and #10 is not the same as #9. Also, you didn't answer the actual question - to which functions can `int arr[10]` be passed.
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    2. CO*#10* is a pointer to an array of 10 integers, not just an `int **`
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    3. COwhoops my bad..., @MooingDuck, thanks for the edit!
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