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<p class="ac"><span lang="EN-US"><span style="mso-tab-count:1">
</span>return true ;</span></p>
<p class="ac"><span lang="EN-US">}</span></p>
<p class="a5"><span style="font-family:楷体_GB2312;mso-ascii-font-family:"Times New Roman"">（</span><span lang="EN-US">10</span><span style="font-family:楷体_GB2312;mso-ascii-font-family:
"Times New Roman"">）</span><span lang="EN-US">Ex010201Exe</span><span style="font-family:楷体_GB2312;mso-ascii-font-family:"Times New Roman"">中重新声明</span><span lang="EN-US">CStudent</span><span style="font-family:楷体_GB2312;mso-ascii-font-family:
"Times New Roman"">类，与</span><span lang="EN-US">Ex010201Dll</span><span style="font-family:楷体_GB2312;mso-ascii-font-family:"Times New Roman"">中的声明略有不同，并在</span><span lang="EN-US">CEx010201ExeDlg::OnInitDialog()</span><span style="font-family:楷体_GB2312;
mso-ascii-font-family:"Times New Roman"">使用</span><span lang="EN-US">CStudent</span><span style="font-family:楷体_GB2312;mso-ascii-font-family:"Times New Roman"">。</span></p>
<p class="ac"><span lang="EN-US">class __declspec(dllimport) CStudent<span style="mso-spacerun: yes"> </span></span></p>
<p class="ac"><span lang="EN-US">{</span></p>
<p class="ac"><span lang="EN-US">public:</span></p>
<p class="ac"><span lang="EN-US"><span style="mso-tab-count:1">
</span>bool SetAge(int iAge);</span></p>
<p class="ac"><span lang="EN-US"><span style="mso-tab-count:1">
</span>CStudent();</span></p>
<p class="ac"><span lang="EN-US"><span style="mso-tab-count:1">
</span>virtual ~CStudent();</span></p>
<p class="ac"><span lang="EN-US"> <o:p>
</o:p>
</span></p>
<p class="ac"><span lang="EN-US">private:</span></p>
<p class="ac"><span lang="EN-US"><span style="mso-tab-count:1">
</span>int<span style="mso-tab-count:2">
</span>m_iAge ;</span></p>
<p class="ac"><span lang="EN-US"> <o:p>
</o:p>
</span></p>
<p class="ac"><span lang="EN-US">};</span></p>
<p class="ac"><span lang="EN-US"> <o:p>
</o:p>
</span></p>
<p class="ac"><span lang="EN-US">BOOL CEx010201ExeDlg::OnInitDialog()</span></p>
<p class="ac"><span lang="EN-US">{</span></p>
<p class="ac"><span lang="EN-US"><span style="mso-tab-count:1">
</span>CDialog::OnInitDialog();</span></p>
<p class="ac"><span lang="EN-US"> <o:p>
</o:p>
</span></p>
<p class="ac"><span lang="EN-US"><span style="mso-tab-count:1">
</span>CStudent stu ;</span></p>
<p class="ac"><span lang="EN-US"><span style="mso-tab-count:1">
</span>if(!stu.SetAge(100))</span><span lang="EN-US" style="font-size:10.0pt;mso-bidi-font-size:12.0pt;color:black;
mso-font-kerning:0pt"><o:p>
</o:p>
</span></p>
<p class="ac"><span lang="EN-US" style="font-size:10.0pt;mso-bidi-font-size:12.0pt;
color:black;mso-font-kerning:0pt"><span style="mso-tab-count:2">
</span>AfxMessageBox(</span><span lang="EN-US" style="font-size:10.0pt;mso-bidi-font-size:12.0pt;color:#000077;
mso-font-kerning:0pt">"</span><span style="font-size:10.0pt;mso-bidi-font-size:
12.0pt;font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman";color:#000077;mso-font-kerning:0pt">设置学生年龄失败</span><span lang="EN-US" style="font-size:10.0pt;mso-bidi-font-size:12.0pt;color:#000077;
mso-font-kerning:0pt">"</span><span lang="EN-US" style="font-size:10.0pt;
mso-bidi-font-size:12.0pt;color:black;mso-font-kerning:0pt">);</span></p>
<p class="ac"><span lang="EN-US">//…</span></p>
<p class="ac"><span lang="EN-US">}</span></p>
<p class="a5"><span style="font-family:楷体_GB2312;mso-ascii-font-family:"Times New Roman"">（</span><span lang="EN-US">11</span><span style="font-family:楷体_GB2312;mso-ascii-font-family:
"Times New Roman"">）把</span><span lang="EN-US">Ex010201Exe</span><span style="font-family:楷体_GB2312;mso-ascii-font-family:"Times New Roman"">设为当前工程，从“</span><span lang="EN-US">Project</span><span style="font-family:楷体_GB2312;mso-ascii-font-family:
"Times New Roman"">”菜单中选择“</span><span lang="EN-US">Dependencies</span><span style="font-family:楷体_GB2312;mso-ascii-font-family:"Times New Roman"">”，在弹出的“</span><span lang="EN-US">Project
Dependencies</span><span style="font-family:楷体_GB2312;
mso-ascii-font-family:"Times New Roman"">”对话框中把唯一的一个复选框选上，如图</span><span lang="EN-US">1-44</span><span style="font-family:楷体_GB2312;mso-ascii-font-family:
"Times New Roman"">所示。设置成功后，</span><span lang="EN-US">Ex010201Dll</span><span style="font-family:楷体_GB2312;mso-ascii-font-family:"Times New Roman"">会依赖于</span><span lang="EN-US">Ex010201Exe</span><span style="font-family:楷体_GB2312;mso-ascii-font-family:
"Times New Roman"">，编译</span><span lang="EN-US">Ex010201Exe</span><span style="font-family:楷体_GB2312;mso-ascii-font-family:"Times New Roman"">时会自动编译</span><span lang="EN-US">Ex010201Dll</span><span style="font-family:楷体_GB2312;mso-ascii-font-family:
"Times New Roman"">。</span></p>
<p class="MsoNormal" align="center" style="text-align:center"><span lang="EN-US"><!--[if gte vml 1]><v:shape
id="_x0000_i1029" type="#_x0000_t75" style='width:190.5pt;height:120pt'>
<v:imagedata src="file:///C:/DOCUME~1/user/LOCALS~1/Temp/msoclip1/01/clip_image013.png"
o:title=""/>
</v:shape><![endif]-->
<img src="2_1_1.38.jpg" v:shapes="_x0000_i1029" width="254" height="160"></span></p>
<p class="a0"><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"">图</span><span lang="EN-US">1-44
</span><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"">设置依赖关系</span></p>
<p class="a5"><span style="font-family:楷体_GB2312;mso-ascii-font-family:"Times New Roman"">（</span><span lang="EN-US">12</span><span style="font-family:楷体_GB2312;mso-ascii-font-family:
"Times New Roman"">）创建并运行</span><span lang="EN-US">Ex010201Exe.exe</span><span style="font-family:楷体_GB2312;mso-ascii-font-family:"Times New Roman"">，查看效果。</span></p>
<p class="a5"><span style="font-family:楷体_GB2312;mso-ascii-font-family:"Times New Roman"">（</span><span lang="EN-US">13</span><span style="font-family:楷体_GB2312;mso-ascii-font-family:
"Times New Roman"">）</span><span lang="EN-US">SetAge</span><span style="font-family:楷体_GB2312;mso-ascii-font-family:"Times New Roman"">这个函数写得极端不合理，因为学生的年龄是有一个范围的，不可以是</span><span lang="EN-US">0</span><span style="font-family:楷体_GB2312;mso-ascii-font-family:
"Times New Roman"">也不可能是</span><span lang="EN-US">100</span><span style="font-family:楷体_GB2312;mso-ascii-font-family:"Times New Roman"">。这里不研究实际范围，假定最小年龄是</span><span lang="EN-US">5</span><span style="font-family:楷体_GB2312;mso-ascii-font-family:
"Times New Roman"">，最大年龄是</span><span lang="EN-US">50</span><span style="font-family:楷体_GB2312;mso-ascii-font-family:"Times New Roman"">。那么</span><span lang="EN-US">SetAge</span><span style="font-family:楷体_GB2312;mso-ascii-font-family:
"Times New Roman"">函数应该这样写：</span></p>
<p class="ac"><span lang="EN-US">bool CStudent::SetAge(int iAge)</span></p>
<p class="ac"><span lang="EN-US">{</span></p>
<p class="ac"><span lang="EN-US"><span style="mso-tab-count:1">
</span>if(iAge < 5 || iAge > 50 )</span></p>
<p class="ac"><span lang="EN-US"><span style="mso-tab-count:2">
</span>return false ;//</span><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"">设置失败</span></p>
<p class="ac"><span lang="EN-US"> <o:p>
</o:p>
</span></p>
<p class="ac"><span lang="EN-US"><span style="mso-tab-count:1">
</span>m_iAge = iAge ;</span></p>
<p class="ac"><span lang="EN-US"><span style="mso-tab-count:1">
</span>return true ;</span></p>
<p class="ac"><span lang="EN-US">}</span></p>
<p class="a5"><span style="font-family:楷体_GB2312;mso-ascii-font-family:"Times New Roman"">只编译</span><span lang="EN-US">Ex010201.dll</span><span style="font-family:楷体_GB2312;mso-ascii-font-family:
"Times New Roman"">，运行</span><span lang="EN-US">Ex010201Exe.exe</span><span style="font-family:楷体_GB2312;mso-ascii-font-family:"Times New Roman"">，查看效果，效果如图</span><span lang="EN-US">1-45</span><span style="font-family:楷体_GB2312;mso-ascii-font-family:
"Times New Roman"">所示。</span></p>
<p class="MsoNormal" align="center" style="text-align:center"><span lang="EN-US"><!--[if gte vml 1]><v:shape
id="_x0000_i1030" type="#_x0000_t75" style='width:128.25pt;height:89.25pt'>
<v:imagedata src="file:///C:/DOCUME~1/user/LOCALS~1/Temp/msoclip1/01/clip_image015.png"
o:title=""/>
</v:shape><![endif]-->
<img src="2_1_1.39.jpg" v:shapes="_x0000_i1030" width="171" height="119"></span></p>
<p class="a0"><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"">图</span><span lang="EN-US">1-45
Ex010201Exe.exe</span><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"">运行效果</span></p>
<p class="MsoNormal"><span style="font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"">这个示例体现了模块化的优点，修改了一个模块，不影响其他模块。</span></p>
<div style="border:solid windowtext .5pt;padding:1.0pt 4.0pt 1.0pt 4.0pt;
background:#D9D9D9">
<p class="aa"><span style="font-family:仿宋_GB2312;mso-ascii-font-family:"Times New Roman"">注意：</span></p>
<p class="aa"><span style="font-family:仿宋_GB2312;mso-ascii-font-family:"Times New Roman"">（</span><span lang="EN-US">1</span><span style="font-family:仿宋_GB2312;mso-ascii-font-family:
"Times New Roman"">）如是一个模块变化较大，声明部分发生了变化，使用此模块的其他模块也必须重新编译。</span></p>
<p class="aa"><span style="font-family:仿宋_GB2312;mso-ascii-font-family:"Times New Roman"">（</span><span lang="EN-US">2</span><span style="font-family:仿宋_GB2312;mso-ascii-font-family:
"Times New Roman"">）将多个工程放进一个工作空间只是便于编写代码，当工程比较多时只需要将几个常用工程放进工作空间。</span></p>
</div>
<p><br><p><font COLOR="#0000ff" face="宋体" size="2"><a href=.\ title=回目录 target="_blank">回目录</a></font></p>
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