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<title>静态类别成员指标（Pointer to static class member）</title>
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<h3><a href="http://caterpillar.onlyfun.net/GossipCN/index.html">From
Gossip@caterpillar</a></h3>
<h1><a href="CppGossip.html">C++
Gossip: 静态类别成员指标（Pointer to static class member）</a></h1>
<a href="MemberFunctionPtr.html">成员函式指标</a>
不可以用来存取静态类成员函式，对于静态类别成员，其指标宣告方式与一般指标宣告方式是类似的，例如有这么一个类别：<br>
<div style="margin-left: 40px;"><span style="font-weight: bold; font-family: Courier New,Courier,monospace;">class SomeClass {</span><br style="font-weight: bold; font-family: Courier New,Courier,monospace;">
<span style="font-weight: bold; font-family: Courier New,Courier,monospace;">public:</span><br style="font-weight: bold; font-family: Courier New,Courier,monospace;">
<span style="font-weight: bold; font-family: Courier New,Courier,monospace;">
static int someVar;</span><br style="font-weight: bold; font-family: Courier New,Courier,monospace;">
<span style="font-weight: bold; font-family: Courier New,Courier,monospace;"> ....</span><br style="font-weight: bold; font-family: Courier New,Courier,monospace;">
<span style="font-weight: bold; font-family: Courier New,Courier,monospace;">
static int someFunction() {</span><br style="font-weight: bold; font-family: Courier New,Courier,monospace;">
<span style="font-weight: bold; font-family: Courier New,Courier,monospace;">
....</span><br style="font-weight: bold; font-family: Courier New,Courier,monospace;">
<span style="font-weight: bold; font-family: Courier New,Courier,monospace;">
return otherVar;</span><br style="font-weight: bold; font-family: Courier New,Courier,monospace;">
<span style="font-weight: bold; font-family: Courier New,Courier,monospace;"> }</span><br style="font-weight: bold; font-family: Courier New,Courier,monospace;">
<span style="font-weight: bold; font-family: Courier New,Courier,monospace;">};</span><br>
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<br>
如果想宣告一个可指向someVar的指标，则与一般指标的宣告无异，例如：<br>
<div style="margin-left: 40px;"><span style="font-weight: bold; font-family: Courier New,Courier,monospace;">int *iPtr =
&SomeClass::someVar;</span><br>
</div>
<br>
当然，您必须注意到存取权限必须是public的成员可以存取，之后取值时与一般指标的取值方法相同：<br>
<div style="margin-left: 40px;"><span style="font-weight: bold; font-family: Courier New,Courier,monospace;">cout << *iPtr
<< endl; // 显示SomeClass::someVar的值</span><br>
</div>
<br>
如果想宣告一个可指向someFunction()的指标，则与函式指标的宣告无异，例如：<br>
<div style="margin-left: 40px;"><span style="font-weight: bold; font-family: Courier New,Courier,monospace;">int (*fPtr)() =
&SomeClass::someFunction;</span><br>
</div>
<br>
之后呼叫函式与一般函式的呼叫无异，例如：<br>
<div style="margin-left: 40px; font-family: Courier New,Courier,monospace;"><span style="font-weight: bold;">cout << fPtr()
<< endl; // 显示SomeClass::someFunction()的传回值</span></div>
<br>
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