lenerror.htm

来自「这是关于VC++中的STL容器的资料,包括了STL容器各个类之间关系以及类的说明」· HTM 代码 · 共 111 行

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<head>
<title> The length_error Class</title>
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<img src="leban3.gif">

<pre>
<font size=5>Class Name</font>            length_error

<font size=5>Header File</font>           &lt;stdexcept&gt;

<font size=5>Classification</font>      Exception
</pre>
<a href="lenerror.htm#diagram">Class Relationship Diagram</a><br>
<br>
<a href="lenerror.htm#desc">Class Description</a><br>
<h1>Member Classes</h1>

<i>None</i>

<h1>Methods</h1>
<a href="lenerror.htm#lengtherror">length_error(const string &What_Arg)</a><br>
<a name="desc"><h3>Description</h3></a>
<p>
Description

The length_error class  is derived from the  logic_error class.  The length_error
class represents exceptions  that are  occur because  some piece of the software component
that causes the exception is attempting to produce an object whose length is larger than 
the maximum allowable size.  What a length_error exception means is class dependent and is
determined by context.  This class represents a node class and  can therefore be used as a
base class for user defined classes.  Objects of type length_error are thrown by methods in
the standard C++ class library.

</p>
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<pre>

<a name="lengtherror">Method            length_error()</a>

Access            Public

Classification    Constructor

Syntax            length_error(const string &What_Arg)      

Parameters        The What_Arg parameter should contain a description of the kind of exception
                  that has occurred.

Return            None

</pre>

<h3>Description</h3>
<p>
The length_error() method constructs an object of type length_error.  The What_Arg parameter
can be used to set a description of the kind of error that this exception represents. 
A set possible solutions is sometimes supplied with the exception description in addition
to the type of error.
</p>
<hr>
<a name="diagram"><h2>length_error Class Relationship Diagram</h2></a>
<img src="length.gif">
<hr>
<a name="example"></a>
<img src="lego.gif">
<pre>
    1   
    2   #include &lt;stdexcept&gt;
    3   
    4   
    5   void main(void)
    6   {
    7   
    8   
    9      try{
   10   
   11            exception X;
   12            throw(X);
   13      }
   14      catch(const exception &X)
   15      {
   16          cout &lt;&lt; X.what() &lt;&lt; endl;
   17   
   18      }
   19   
   20      try
   21      {      
   22          length_error LengthError("Some Size Error");
   23          throw(LengthError);
   24      }
   25      catch(const exception &X)
   26      {
   27          cout &lt;&lt; X.what() &lt;&lt; endl;
   28      }     
   29      
   30   
   31   
   32   }
   33   
</pre>
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