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来自「《Big C++ 》Third Edition电子书和代码全集-Part1」· HTML 代码 · 共 46 行
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<h2><font color="#009999">17.4 Overloading Comparison Operators</font></h2>
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<ul>
<li>Similar to the arithmetic operators
<li><i>Not</i> supplied automatically</li>
<li>Typically return a <tt>bool</tt>
<li><b>E.g.:</b> <tt>Time</tt>s are equal <=> difference is 0
<blockquote>
<pre>bool operator==(const Time& a, const Time& b)
{
return a.seconds_from(b) == 0;
}</pre>
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