a_5.6.htm

来自「建立《编译原理网络课程》的目的不仅使学生掌握构造编译程序的原理和技术」· HTM 代码 · 共 89 行

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<html>
<head>
<title>5.6的解答</title>
</head>
<body background="../../images/background.gif" >
<center><font class="title2"><b>练习5.6</b></font></center><br>
<p>解答:&nbsp;</p>   


<table align = center border = 1 width = "80%" cellspacing="0" cellpadding="5">
<tr>
<td width = "30%"><div align = center>产生式</div></td>
<td width = "70%"><div align = center>语义规则</div></td>
</tr>

<tr>
<td >
	
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; D -&gt; D<sub>1</sub>,id      
	
</td>
<td >
	
D.type:=D<sub>1</sub>.type;
<p>addtype(id.entry,D<sub>1</sub>.type);   
 
	
</td>
</tr>


<tr>
<td >
	
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; D -&gt; T id  
	
</td>
<td>
	
D.type:=T.type;
<p>addtype(id.entry,T.type);</p>
	
</td>
</tr>


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<td>
	
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; T -&gt; int  
	
</td>
<td>
	
T.type:=int;
	
</td>
</tr>


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<td>
	
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; T -&gt; real  
	
</td>
<td>
	
T.type:=real;
	
</td>
</tr>






</table>



<p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </p> 



</body>

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