devdocs/gcc~13/pointers-to-arrays.html


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<div class="section-level-extent" id="Pointers-to-Arrays"> <div class="nav-panel"> <p> Next: <a href="initializers" accesskey="n" rel="next">Non-Constant Initializers</a>, Previous: <a href="variadic-pointer-args" accesskey="p" rel="prev">Pointer Arguments in Variadic Functions</a>, Up: <a href="c-extensions" accesskey="u" rel="up">Extensions to the C Language Family</a> [<a href="index#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="indices" title="Index" rel="index">Index</a>]</p> </div>  <h1 class="section" id="Pointers-to-Arrays-with-Qualifiers-Work-as-Expected"><span>6.26 Pointers to Arrays with Qualifiers Work as Expected<a class="copiable-link" href="#Pointers-to-Arrays-with-Qualifiers-Work-as-Expected"> ¶</a></span></h1>   <p>In GNU C, pointers to arrays with qualifiers work similar to pointers to other qualified types. For example, a value of type <code class="code">int (*)[5]</code> can be used to initialize a variable of type <code class="code">const int (*)[5]</code>. These types are incompatible in ISO C because the <code class="code">const</code> qualifier is formally attached to the element type of the array and not the array itself. </p> <div class="example smallexample"> <pre class="example-preformatted" data-language="cpp">extern void
transpose (int N, int M, double out[M][N], const double in[N][M]);
double x[3][2];
double y[2][3];
<span class="r">…</span>
transpose(3, 2, y, x);</pre>
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