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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">21.6 Slicing and Polymorphism</font></h2>
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<ul>
	<li>Layout of objects on the stack is determined at compile time</li>
	<li>C++ used different rules for pointers than for objects</li>
	<li>Only pointers (and references) are truly polymorphic:
		<blockquote>
<pre>Employee e("Lisa Lim", 36000);
Manager m("Sarah Smith", 67000, 2000);
e = m; <font color="#0000cc">// Permitted, but manager fields sliced away</font>
cout &lt;&lt; e.annual_income() &lt;&lt; "\n";
   <font color="#0000cc">// Uses Employee member function</font></pre>
		</blockquote>
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