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📄 example4-2.htm

📁 Visual C++面向对象程序设计教程（配套习题资源）
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<title>例4-2</title>
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<blockquote>
  <blockquote>
    <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">#include 
    &lt;iostream.h&gt;</font></p>
    <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">class 
    A</font></p>
    <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">{</font></p>
    <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">public:</font></p>
    <blockquote>
      <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">A( 
      ) { a=0; cout&lt;&lt;&quot;<font FACE="??ì?,SimSun" LANG="ZH-CN">类</font>A<font FACE="??ì?,SimSun" LANG="ZH-CN">的缺省构造函数</font>.\n&quot;; 
      }</font></p>
      <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">A(int 
      i) { a=i; cout&lt;&lt;&quot;<font FACE="??ì?,SimSun" LANG="ZH-CN">类</font>A<font FACE="??ì?,SimSun" LANG="ZH-CN">的构造函数</font>.\n&quot;; 
      }</font></p>
      <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">~A( 
      ) { cout&lt;&lt;&quot;<font FACE="??ì?,SimSun" LANG="ZH-CN">类</font>A<font FACE="??ì?,SimSun" LANG="ZH-CN">的析构函数</font>.\n&quot;; 
      }</font></p>
      <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">void 
      Print( ) const { cout&lt;&lt;a&lt;&lt;&quot;,&quot;; }</font></p>
      <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">int 
      Geta( ) { return a; }</font></p>
    </blockquote>
    <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">private:</font></p>
    <blockquote>
      <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">int 
      a;</font></p>
    </blockquote>
    <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">};</font></p>
    <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">class 
    B : public A</font></p>
    <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">{</font></p>
    <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">public:</font></p>
    <blockquote>
      <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">B( 
      ) { b=0; cout&lt;&lt;&quot;<font FACE="??ì?,SimSun" LANG="ZH-CN">类</font>B<font FACE="??ì?,SimSun" LANG="ZH-CN">的缺省构造函数</font>.\n&quot;; 
      }</font></p>
      <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">B(int 
      i, int j, int k);</font></p>
      <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">~B( 
      ) { cout&lt;&lt;&quot;<font FACE="??ì?,SimSun" LANG="ZH-CN">类</font>B<font FACE="??ì?,SimSun" LANG="ZH-CN">的析构函数</font>.\n&quot;; 
      }</font></p>
      <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">void 
      Print( );</font></p>
    </blockquote>
    <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">private:</font></p>
    <blockquote>
      <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">int 
      b;</font></p>
      <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">A 
      aa;</font></p>
    </blockquote>
    <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">};</font></p>
    <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">B::B(int 
    i, int j, int k):A(i), aa(j)</font></p>
    <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">{</font></p>
    <blockquote>
      <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">b=k;</font></p>
      <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">cout&lt;&lt;&quot;<font FACE="??ì?,SimSun" LANG="ZH-CN">类</font>B<font FACE="??ì?,SimSun" LANG="ZH-CN">的构造函数</font>.\n&quot;;</font></p>
    </blockquote>
    <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">}</font></p>
    <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">void 
    B::Print( )</font></p>
    <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">{</font></p>
    <blockquote>
      <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">A::Print( 
      );</font></p>
      <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">cout&lt;&lt;b&lt;&lt;&quot;,&quot;&lt;&lt;aa.Geta( 
      )&lt;&lt;endl;</font></p>
    </blockquote>
    <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">}</font></p>
    <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">void 
    main( )</font></p>
    <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">{</font></p>
    <blockquote>
      <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">B 
      bb[2];</font></p>
      <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">bb[0] 
      = B(1, 2, 5);</font></p>
      <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">bb[1] 
      = B(3, 4, 7);</font></p>
      <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">for(int 
      i=0; i&lt;2; i++)</font></p>
      <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">bb[i].Print( 
      );</font></p>
    </blockquote>
    <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">}</font></p>
  </blockquote>
</blockquote>
<p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font FACE="??ì?,SimSun" LANG="ZH-CN" size="2">程序运行结果是：</font></p>
<blockquote>
  <blockquote>
    <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2"><font FACE="??ì?,SimSun" LANG="ZH-CN">类</font>A<font FACE="??ì?,SimSun" LANG="ZH-CN">的缺省构造函数</font></font></p>
    <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2"><font FACE="??ì?,SimSun" LANG="ZH-CN">类</font>A<font FACE="??ì?,SimSun" LANG="ZH-CN">的缺省构造函数</font></font></p>
    <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2"><font FACE="??ì?,SimSun" LANG="ZH-CN">类</font>B<font FACE="??ì?,SimSun" LANG="ZH-CN">的缺省构造函数</font></font></p>
    <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2"><font FACE="??ì?,SimSun" LANG="ZH-CN">类</font>A<font FACE="??ì?,SimSun" LANG="ZH-CN">的缺省构造函数</font></font></p>
    <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2"><font FACE="??ì?,SimSun" LANG="ZH-CN">类</font>A<font FACE="??ì?,SimSun" LANG="ZH-CN">的缺省构造函数</font></font></p>
    <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2"><font FACE="??ì?,SimSun" LANG="ZH-CN">类</font>B<font FACE="??ì?,SimSun" LANG="ZH-CN">的缺省构造函数</font></font></p>
    <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2"><font FACE="??ì?,SimSun" LANG="ZH-CN">类</font>A<font FACE="??ì?,SimSun" LANG="ZH-CN">的构造函数</font></font></p>
    <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2"><font FACE="??ì?,SimSun" LANG="ZH-CN">类</font>A<font FACE="??ì?,SimSun" LANG="ZH-CN">的构造函数</font></font></p>
    <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2"><font FACE="??ì?,SimSun" LANG="ZH-CN">类</font>B<font FACE="??ì?,SimSun" LANG="ZH-CN">的构造函数</font></font></p>
    <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2"><font FACE="??ì?,SimSun" LANG="ZH-CN">类</font>B<font FACE="??ì?,SimSun" LANG="ZH-CN">的析构函数</font></font></p>
    <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2"><font FACE="??ì?,SimSun" LANG="ZH-CN">类</font>A<font FACE="??ì?,SimSun" LANG="ZH-CN">的析构函数</font></font></p>
    <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2"><font FACE="??ì?,SimSun" LANG="ZH-CN">类</font>A<font FACE="??ì?,SimSun" LANG="ZH-CN">的析构函数</font></font></p>
    <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2"><font FACE="??ì?,SimSun" LANG="ZH-CN">类</font>A<font FACE="??ì?,SimSun" LANG="ZH-CN">的构造函数</font></font></p>
    <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2"><font FACE="??ì?,SimSun" LANG="ZH-CN">类</font>A<font FACE="??ì?,SimSun" LANG="ZH-CN">的构造函数</font></font></p>
    <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2"><font FACE="??ì?,SimSun" LANG="ZH-CN">类</font>B<font FACE="??ì?,SimSun" LANG="ZH-CN">的构造函数</font></font></p>
    <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2"><font FACE="??ì?,SimSun" LANG="ZH-CN">类</font>B<font FACE="??ì?,SimSun" LANG="ZH-CN">的析构函数</font></font></p>
    <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2"><font FACE="??ì?,SimSun" LANG="ZH-CN">类</font>A<font FACE="??ì?,SimSun" LANG="ZH-CN">的析构函数</font></font></p>
    <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2"><font FACE="??ì?,SimSun" LANG="ZH-CN">类</font>A<font FACE="??ì?,SimSun" LANG="ZH-CN">的析构函数</font></font></p>
    <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">1,5,2</font></p>
    <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2">3,7,4</font></p>
    <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2"><font FACE="??ì?,SimSun" LANG="ZH-CN">类</font>B<font FACE="??ì?,SimSun" LANG="ZH-CN">的析构函数</font></font></p>
    <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2"><font FACE="??ì?,SimSun" LANG="ZH-CN">类</font>A<font FACE="??ì?,SimSun" LANG="ZH-CN">的析构函数</font></font></p>
    <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2"><font FACE="??ì?,SimSun" LANG="ZH-CN">类</font>A<font FACE="??ì?,SimSun" LANG="ZH-CN">的析构函数</font></font></p>
    <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2"><font FACE="??ì?,SimSun" LANG="ZH-CN">类</font>B<font FACE="??ì?,SimSun" LANG="ZH-CN">的析构函数</font></font></p>
    <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2"><font FACE="??ì?,SimSun" LANG="ZH-CN">类</font>A<font FACE="??ì?,SimSun" LANG="ZH-CN">的析构函数</font></font></p>
    <p ALIGN="justify" style="line-height: 100%; margin-top: 0; margin-bottom: 0"><font size="2"><font FACE="??ì?,SimSun" LANG="ZH-CN">类</font>A<font FACE="??ì?,SimSun" LANG="ZH-CN">的析构函数</font></font></p>
  </blockquote>
</blockquote>

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