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<img border="0" src="images/9_25_3.gif" align = left width="394" height="122">图２（c）中的分支语句产生的定值集合是什么？<p>
解析：对图２（c）的if语句，它的任意分支产生的定值都会到达语句S的结束点。所以我们认为： </p>
<p><span style="FONT-SIZE: large"> gen[S]= gen[S1]∪gen[S2]</span></td>
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