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    <p>You can use either of the two methods below, depending on whether you're comfortable with pointers or not. It will also be worthwhile looking at them side-by-side when you satrt learning about pointers so you can better understand how they map to each other.</p> <p>This is a full program for testing purposes:</p> <pre><code>#include &lt;stdio.h&gt; #include &lt;string.h&gt; // The pointer version. void reverse1 (char *str) { char t; // Temporary char for swapping. char *s = str; // First character of string. char *e = &amp;(s[strlen(s)-1]); // Last character of string. // Swap first and last character the move both pointers // towards each other. Stop when they meet or cross. while (s &lt; e) { t = *s; *s++ = *e; *e-- = t; } } // The array version. void reverse2 (char *str) { char t; // Temporary char for swapping. int s = 0; // First character of string. int e = strlen(str)-1; // Last character of string. // Swap first and last character the move both pointers // towards each other. Stop when they meet or cross. while (s &lt; e) { t = str[s]; str[s++] = str[e]; str[e--] = t; } } </code></pre> <p>&nbsp;</p> <pre><code>int main (void) { char x[] = "This is a string for reversing."; printf ("Original: [%s]\n", x); reverse1 (x); printf ("Reversed: [%s]\n", x); reverse2 (x); printf (" Again: [%s]\n", x); return 0; } </code></pre> <p>and the output is:</p> <pre><code>Original: [This is a string for reversing.] Reversed: [.gnisrever rof gnirts a si sihT] Again: [This is a string for reversing.] </code></pre>
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    1. POHelp with reversing a string in C
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    1. COThis looks great, but I'm not up to pointers yet. Anyway, thanks, it looks efficient.
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    2. CO@alex, I've added a non-pointer version since you're not yet comfortable with pointers.
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