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C++builder学习资料C++builder

    
<p class=BodyText> &nbsp; </p>    
    
<p class=BodyText> This is    
an example of operations in IDL: </p>    
    
<p class=BodyText> &nbsp; </p>    
    
<p class=Code><span class=Code><b>void</b> MakePayment(<b>in</b> <b>double</b>    
amount, <b>in</b> <b>string</b> currency); </span></p>    
    
<p class=Code><span class=Code><b>double</b> BalanceDue(<b>in</b> <b>long</b>    
custno, <b>out</b> <b>boolean</b> pastdue); </span></p>    
    
<p class=Code><span class=Code><b>void</b> isValidAddress(<b>in</b> <b>string</b>    
address) <b>raises</b>(NotValidAddress); </span></p>    
    
<p class=BodyText> &nbsp; </p>    
    
<p class=BodyText> This    
code shows an example of operations mapped to C++:</p>    
    
<p class=BodyText> &nbsp; </p>    
    
<p class=Code><span class=Code><b>virtual</b>    
CORBA::Double balanceDue(CORBA::Long _custno, </span></p>    
    
<p class=Code><span class=Code>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;CORBA::Boolean&amp; _pastdue); </span></p>    
    
<p class=Code><span class=Code><b>virtual</b>    
<b>void</b> makePayment(CORBA::Double    
_amount, </span></p>    
    
<p class=Code><span class=Code>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<b> const</b> <b>char</b>* _currency); </span></p>    
    
<p class=Code><span class=Code><b>virtual</b>    
<b>void</b> isValidAddress(<b    
style='mso-bidi-font-weight:normal'>const</b> <b>char</b>* _address); </span></p>    
    
<p class=BodyText> &nbsp; </p>    
    
<p class=BodyText> <b>Data    
types.</b> IDL has a    
full range of primitive and complex data types. The primitive data types    
include <b>boolean</b>, <b>char</b>, <b>string</b>, <b>octet</b>, integers    
(e.g. <b>long</b>), and <b>float</b>. Complex data types include <b>array</b>, <b>sequence</b>,    
<b>struct</b>, <b>enum</b>, <b>union</b>, <b>typedef</b>, and <b>any</b>. The <b>any</b>    
type is a self-describing data type that allows the argument to retain its    
type. <b>any</b> can be used to load or extract IDL pre-defined types in a    
type-safe, generic manner. </p>    
    
<p class=BodyText> &nbsp; </p>    
    
<p class=BodyText> Figure 6    
shows a list of basic IDL data types mapped to C++. Objects can't currently be    
passed by value; they can only be passed by reference. The next version of    
VisiBroker that supports the new CORBA standard should support passing an    
object by value. This ability to pass by value is a new addition to the    
standard. </p>    
    
<p class=BodyText> &nbsp; </p>    
    
<table border=1 cellspacing=0 cellpadding=0 style='border-collapse:collapse;    
 border:none;mso-border-alt:solid windowtext .5pt;mso-padding-alt:0in 5.4pt 0in 5.4pt'>    
 <tr>    
  <td width=94 valign=top style='width:70.4pt;border:solid windowtext .5pt;    
  padding:0in 5.4pt 0in 5.4pt'>    
  <p class=BodyText> <b>IDL    
  Data Type</b></p>    
  </td>    
  <td width=56 valign=top style='width:42.25pt;border:solid windowtext .5pt;    
  border-left:none;mso-border-left-alt:solid windowtext .5pt;padding:0in 5.4pt 0in 5.4pt'>    
  <p class=BodyText> <b>In </b></p>    
  </td>    
  <td width=64 valign=top style='width:47.75pt;border:solid windowtext .5pt;    
  border-left:none;mso-border-left-alt:solid windowtext .5pt;padding:0in 5.4pt 0in 5.4pt'>    
  <p class=BodyText> <b>InOut</b></p>    
  </td>    
  <td width=61 valign=top style='width:45.6pt;border:solid windowtext .5pt;    
  border-left:none;mso-border-left-alt:solid windowtext .5pt;padding:0in 5.4pt 0in 5.4pt'>    
  <p class=BodyText> <b>Out</b></p>    
  </td>    
  <td width=59 valign=top style='width:44.4pt;border:solid windowtext .5pt;    
  border-left:none;mso-border-left-alt:solid windowtext .5pt;padding:0in 5.4pt 0in 5.4pt'>    
  <p class=BodyText> <b>Return</b></p>    
  </td>    
 </tr>    
 <tr>    
  <td width=94 valign=top style='width:70.4pt;border:solid windowtext .5pt;    
  border-top:none;mso-border-top-alt:solid windowtext .5pt;padding:0in 5.4pt 0in 5.4pt'>    
  <p class=BodyText> short</p>    
  </td>    
  <td width=56 valign=top style='width:42.25pt;border-top:none;border-left:    
  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;    
  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;    
  padding:0in 5.4pt 0in 5.4pt'>    
  <p class=BodyText> short</p>    
  </td>    
  <td width=64 valign=top style='width:47.75pt;border-top:none;border-left:    
  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;    
  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;    
  padding:0in 5.4pt 0in 5.4pt'>    
  <p class=BodyText> short&amp; </p>    
  </td>    
  <td width=61 valign=top style='width:45.6pt;border-top:none;border-left:none;    
  border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;    
  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;    
  padding:0in 5.4pt 0in 5.4pt'>    
  <p class=BodyText> short&amp; </p>    
  </td>    
  <td width=59 valign=top style='width:44.4pt;border-top:none;border-left:none;    
  border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;    
  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;    
  padding:0in 5.4pt 0in 5.4pt'>    
  <p class=BodyText> short</p>    
  </td>    
 </tr>    
 <tr>    
  <td width=94 valign=top style='width:70.4pt;border:solid windowtext .5pt;    
  border-top:none;mso-border-top-alt:solid windowtext .5pt;padding:0in 5.4pt 0in 5.4pt'>    
  <p class=BodyText> unsigned    
  short</p>    
  </td>    
  <td width=56 valign=top style='width:42.25pt;border-top:none;border-left:    
  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;    
  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;    
  padding:0in 5.4pt 0in 5.4pt'>    
  <p class=BodyText> unsigned    
  short</p>    
  </td>    
  <td width=64 valign=top style='width:47.75pt;border-top:none;border-left:    
  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;    
  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;    
  padding:0in 5.4pt 0in 5.4pt'>    
  <p class=BodyText> unsigned    
  short&amp; </p>    
  </td>    
  <td width=61 valign=top style='width:45.6pt;border-top:none;border-left:none;    
  border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;    
  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;    
  padding:0in 5.4pt 0in 5.4pt'>    
  <p class=BodyText> unsigned    
  short&amp; </p>    
  </td>    
  <td width=59 valign=top style='width:44.4pt;border-top:none;border-left:none;    
  border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;    
  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;    
  padding:0in 5.4pt 0in 5.4pt'>    
  <p class=BodyText> unsigned    
  short </p>    
  </td>    
 </tr>    
 <tr>    
  <td width=94 valign=top style='width:70.4pt;border:solid windowtext .5pt;    
  border-top:none;mso-border-top-alt:solid windowtext .5pt;padding:0in 5.4pt 0in 5.4pt'>    
  <p class=BodyText> long</p>    
  </td>    
  <td width=56 valign=top style='width:42.25pt;border-top:none;border-left:    
  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;    
  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;    
  padding:0in 5.4pt 0in 5.4pt'>    
  <p class=BodyText> long</p>    
  </td>    
  <td width=64 valign=top style='width:47.75pt;border-top:none;border-left:    
  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;    
  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;    
  padding:0in 5.4pt 0in 5.4pt'>    
  <p class=BodyText> long&amp; </p>    
  </td>    
  <td width=61 valign=top style='width:45.6pt;border-top:none;border-left:none;    
  border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;    
  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;    
  padding:0in 5.4pt 0in 5.4pt'>    
  <p class=BodyText> long&amp; </p>    
  </td>    
  <td width=59 valign=top style='width:44.4pt;border-top:none;border-left:none;    
  border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;    
  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;    
  padding:0in 5.4pt 0in 5.4pt'>    
  <p class=BodyText> long</p>    
  </td>    
 </tr>    
 <tr>    
  <td width=94 valign=top style='width:70.4pt;border:solid windowtext .5pt;    
  border-top:none;mso-border-top-alt:solid windowtext .5pt;padding:0in 5.4pt 0in 5.4pt'>    
  <p class=BodyText> unsigned    
  long</p>    
  </td>    
  <td width=56 valign=top style='width:42.25pt;border-top:none;border-left:    
  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;    
  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;    
  padding:0in 5.4pt 0in 5.4pt'>    
  <p class=BodyText> unsigned    
  long</p>    
  </td>    
  <td width=64 valign=top style='width:47.75pt;border-top:none;border-left:    
  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;    
  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;    
  padding:0in 5.4pt 0in 5.4pt'>    
  <p class=BodyText> unsigned    
  long&amp; </p>    
  </td>    
  <td width=61 valign=top style='width:45.6pt;border-top:none;border-left:none;    
  border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;    
  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;    
  padding:0in 5.4pt 0in 5.4pt'>    
  <p class=BodyText> unsigned    
  long&amp; </p>    
  </td>    
  <td width=59 valign=top style='width:44.4pt;border-top:none;border-left:none;    
  border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;    
  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;    
  padding:0in 5.4pt 0in 5.4pt'>    
  <p class=BodyText> unsigned    
  long</p>    
  </td>    
 </tr>    
 <tr>    
  <td width=94 valign=top style='width:70.4pt;border:solid windowtext .5pt;    
  border-top:none;mso-border-top-alt:solid windowtext .5pt;padding:0in 5.4pt 0in 5.4pt'>    
  <p class=BodyText> float</p>    
  </td>    
  <td width=56 valign=top style='width:42.25pt;border-top:none;border-left:    
  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;    
  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;    
  padding:0in 5.4pt 0in 5.4pt'>    
  <p class=BodyText> float</p>    
  </td>    
  <td width=64 valign=top style='width:47.75pt;border-top:none;border-left:    
  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;    
  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;    
  padding:0in 5.4pt 0in 5.4pt'>    
  <p class=BodyText> float&amp; </p>    
  </td>    
  <td width=61 valign=top style='width:45.6pt;border-top:none;border-left:none;    
  border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;    
  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;    
  padding:0in 5.4pt 0in 5.4pt'>    
  <p class=BodyText> float&amp; </p>    
  </td>    
  <td width=59 valign=top style='width:44.4pt;border-top:none;border-left:none;    
  border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;    
  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;    
  padding:0in 5.4pt 0in 5.4pt'>    
  <p class=BodyText> float</p>    
  </td>    
 </tr>    
 <tr>    
  <td width=94 valign=top style='width:70.4pt;border:solid windowtext .5pt;    
  border-top:none;mso-border-top-alt:solid windowtext .5pt;padding:0in 5.4pt 0in 5.4pt'>    
  <p class=BodyText> double</p>    
  </td>    
  <td width=56 valign=top style='width:42.25pt;border-top:none;border-left:    
  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;    
  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;    
  padding:0in 5.4pt 0in 5.4pt'>    
  <p class=BodyText> double</p>    
  </td>    
  <td width=64 valign=top style='width:47.75pt;border-top:none;border-left:    
  none;border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;    
  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;    
  padding:0in 5.4pt 0in 5.4pt'>    
  <p class=BodyText> double&amp; </p>    
  </td>    
  <td width=61 valign=top style='width:45.6pt;border-top:none;border-left:none;    
  border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;    
  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;    
  padding:0in 5.4pt 0in 5.4pt'>    
  <p class=BodyText> double&amp; </p>    
  </td>    
  <td width=59 valign=top style='width:44.4pt;border-top:none;border-left:none;    
  border-bottom:solid windowtext .5pt;border-right:solid windowtext .5pt;    
  mso-border-top-alt:solid windowtext .5pt;mso-border-left-alt:solid windowtext .5pt;    
  padding:0in 5.4pt 0in 5.4pt'>    
  <p class=BodyText> double</p>    
  </td>    
 </tr>    
 <tr>    
  <td width=94 valign=top style='width:70.4pt;border:solid windowtext .5pt;    
  border-top:none;mso-border-top-alt:solid windowtext .5pt;padding:0in 5.4pt 0in 5.4pt'>    
  <p class=BodyText> boolean</p>