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📁 Visual C++面向对象程序设计教程(配套习题资源)
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<title>第 3 章</title>
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<p style="line-height: 100%; margin-top: 0; margin-bottom: 0">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</p>
<p style="line-height: 100%; text-indent: 0; margin: 0" class="右标题" align="left">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;                         
&nbsp;&nbsp;&nbsp; <span style="background-color: #CCFF99">第 3 章</span><span style="background-color: #CCFF99">&nbsp;                       
</span>&gt;<span style="background-color: #CCFF99"> 第 6 节 </span>&gt;<span style="background-color: #CCFF99">  
 3.6 </span><span style="background-color: #CCFF99">内联函数</span></p>         
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<p ALIGN="justify" class="右标题" style="line-height: 100%; margin-top: 0; margin-bottom: 0"></font><font FACE="??ì?,SimSun" LANG="ZH-CN" size="2">内联函数可以提高函数运行的速度,但是会增加编译的时间。</font></p>
<p ALIGN="justify" style="line-height: 200%; margin-top: 0; margin-bottom: 0"><font FACE="oúì?,SimHei" LANG="ZH-CN" size="2">1. 
内联函数和外联函数</font></p>
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<p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"></font><font FACE="??ì?,SimSun" LANG="ZH-CN" size="2">类的成员函数可以分为内联函数和外联函数。内联函数是指那些定义在类内的成员函数。而说明在类内,定义在类外的成员函数叫外联函数。</font></p>
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<p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"></font><font FACE="??ì?,SimSun" LANG="ZH-CN" size="2">内联函数在调用时不是像一般函数那样要转去执行被调函数的函数体,执行完后再转回到调用函数。而是在调用函数处用内联函数体的代码来代替,这将会节省调用的开销,提高运行速度。</font></p>
<p ALIGN="justify" style="line-height: 200%; margin-top: 0; margin-bottom: 0"><font FACE="oúì?,SimHei" LANG="ZH-CN" size="2">2. 
内联函数的定义方法</font></p>
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<p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"></font><font size="2"><font FACE="??ì?,SimSun" LANG="ZH-CN">所有在类说明内部定义的函数都是内联函数。内联函数除了可以定义在类内,还可以定义在类外,但在内外定义时需要在函数定义的头前加上关键字</font><font color="#FF6600"><b>inline</b></font><font FACE="??ì?,SimSun" LANG="ZH-CN">。如:</font></font></p>
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    <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2" color="#FF6600">inline 
    </font><font size="2" color="#008000">int add_int (int x, int y, int z)</font></p>
    <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2" color="#008000">{</font></p>
    <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2" color="#008000">return 
    x+y+z;</font></p>
    <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2" color="#008000">}</font></p>
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<p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"></font><font FACE="??ì?,SimSun" LANG="ZH-CN" size="2"><font color="#FF6600">在使用内联函数时,应注意如下两点</font>:</font></p>
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<p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"></font><font FACE="??ì?,SimSun" LANG="ZH-CN" size="2">① 
在内联函数内不允许使用循环语句。</font></p>
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<p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"></font><font FACE="??ì?,SimSun" LANG="ZH-CN" size="2">② 
内联函数的定义必须出现在内联函数第一次被调用之前。</font></p>
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<p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2"><font FACE="??ì?,SimSun" LANG="ZH-CN"><a href="example3-21.htm" target="_blank">【例</a></font><a href="example3-21.htm" target="_blank">3-21<font FACE="??ì?,SimSun" LANG="ZH-CN">】</font></a><font FACE="??ì?,SimSun" LANG="ZH-CN">请看下面程序的运行结果。</font></font></p>
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