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swap.cpp.html
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swap.cpp.html
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<meta name="GENERATOR" content="GNU source-highlight
by Lorenzo Bettini
http://www.lorenzobettini.it
http://www.gnu.org/software/src-highlite">
<title>swap.cpp</title>
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<pre><i><span style="color:#9A1900">/* swap()</span></i>
<i><span style="color:#9A1900"> * common use for pointers</span></i>
<i><span style="color:#9A1900"> * demonstrates use of * to dereference, * to declare pointer, and & to pass an address</span></i>
<i><span style="color:#9A1900"> */</span></i>
<b><span style="color:#000080">#include</span></b> <span style="color:#FF0000"><iostream></span>
<b><span style="color:#0000FF">using</span></b> <b><span style="color:#0000FF">namespace</span></b> std<span style="color:#990000">;</span>
<span style="color:#009900">void</span> <b><span style="color:#000000">swap</span></b><span style="color:#990000">(</span><span style="color:#009900">int</span> <span style="color:#990000">*</span> x<span style="color:#990000">,</span> <span style="color:#009900">int</span> <span style="color:#990000">*</span> y<span style="color:#990000">)</span> <span style="color:#FF0000">{</span>
<span style="color:#009900">int</span> temp <span style="color:#990000">=</span> <span style="color:#990000">*</span>x<span style="color:#990000">;</span> <i><span style="color:#9A1900">//temp = dereference x</span></i>
<span style="color:#990000">*</span>x <span style="color:#990000">=</span> <span style="color:#990000">*</span>y<span style="color:#990000">;</span>
<span style="color:#990000">*</span>y <span style="color:#990000">=</span> temp<span style="color:#990000">;</span>
<span style="color:#FF0000">}</span>
<span style="color:#009900">int</span> <b><span style="color:#000000">main</span></b><span style="color:#990000">()</span> <span style="color:#FF0000">{</span>
<span style="color:#009900">int</span> a<span style="color:#990000">=</span><span style="color:#993399">0</span><span style="color:#990000">;</span>
<span style="color:#009900">int</span> b<span style="color:#990000">=</span><span style="color:#993399">3</span><span style="color:#990000">;</span>
cout <span style="color:#990000"><<</span> <span style="color:#FF0000">"Before swap(): a: "</span> <span style="color:#990000"><<</span> a <span style="color:#990000"><<</span> <span style="color:#FF0000">" b: "</span> <span style="color:#990000"><<</span> b <span style="color:#990000"><<</span> endl<span style="color:#990000">;</span>
<b><span style="color:#000000">swap</span></b><span style="color:#990000">(&</span>b<span style="color:#990000">,&</span>a<span style="color:#990000">);</span>
cout <span style="color:#990000"><<</span> <span style="color:#FF0000">"After swap(): a: "</span> <span style="color:#990000"><<</span> a <span style="color:#990000"><<</span> <span style="color:#FF0000">" b: "</span> <span style="color:#990000"><<</span> b <span style="color:#990000"><<</span> endl<span style="color:#990000">;</span>
<b><span style="color:#0000FF">return</span></b> <span style="color:#993399">0</span><span style="color:#990000">;</span>
<span style="color:#FF0000">}</span>
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