若有以下说明和语句：sturct st { int n;char *ch;}; struct st a[3]={5, &quot;abc&quot;,7, &quot;def&quot;,9, &quot;ghk&quot; /> <div class=&quot;width960&quot;> <div id=&quot;div_lit_topnav_960_90&quot;> <div class=&quot;h15&quot;> </div> <script type=&quot;text/java