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POArray to pointer decay and passing multidimensional arrays to functions
 

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    <p>I know that an array decays to a pointer, such that if one declared</p> <pre><code>char things[8]; </code></pre> <p>and then later on used <code>things</code> somewhere else, <code>things</code> is a pointer to the first element in the array.</p> <p>Also, from my understanding, if one declares</p> <pre><code>char moreThings[8][8]; </code></pre> <p>then <code>moreThings</code> is <em>not</em> of type pointer to char but of type "array of pointers to char," because the decay only occurs once.</p> <p>When <code>moreThings</code> is passed to a function (say with prototype <code>void doThings(char thingsGoHere[8][8])</code> what is actually going on with the stack?</p> <p>If <code>moreThings</code> is not of pointer type, then is this really still a pass-by-reference? I guess I always thought that <code>moreThings</code> still represented the base address of the multidimensional array. What if <code>doThings</code> took input <code>thingsGoHere</code> and itself passed it to another function?</p> <p>Is the rule pretty much that unless one specifies an array input as <code>const</code> then the array will always be modifiable?</p> <p>I know that the type checking stuff only happens at compile time, but I'm still confused about what technically counts as a pass by reference (i.e. is it only when arguments of type pointer are passed, or would array of pointers be a pass-by-reference as well?)</p> <p>Sorry to be a little all over the place with this question, but because of my difficulty in understanding this it is hard to articulate a precise inquiry.</p>
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