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📁 《Big C++ 》Third Edition电子书和代码全集-Part1

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<h2><font color='#009999'>26.6 The COMPOSITE Pattern (cont.)</font></h2>
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	<li>Functions of the composite class must be applied to all primitives, then
		combine the results</li>
	<li>E.g., compute the price of a bundle:
		<blockquote>
<pre>double Bundle::get_unit_price() const
{
   double price = 0;
   for (int i = 0; i &lt; items.size(); i++)
   {
      price = price +
         ( items[i]-&gt;get_unit_price()
            * items[i]-&gt;get_quantity() );
   }
   return price;
}</pre>
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