Sophie: php-manual-zh-5.2.4-1mdv2008.1 noarch

php-manual-zh-5.2.4-1mdv2008.1.noarch.rpm

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><H1
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>bccomp</H1
><DIV
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><A
NAME="AEN14050"
></A
><P
>    (PHP 3, PHP 4, PHP 5)</P
>bccomp&nbsp;--&nbsp;Compare two arbitrary precision numbers</DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN14053"
></A
><H2
>说明</H2
>int <B
CLASS="methodname"
>bccomp</B
> ( string left_operand, string right_operand [, int scale] )<BR
></BR
><P
>&#13;   Compares the <CODE
CLASS="parameter"
>left_operand</CODE
> to the
   <CODE
CLASS="parameter"
>right_operand</CODE
> and returns the result as an
   integer.  
  </P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN14070"
></A
><H2
>参数</H2
><P
>&#13;   <P
></P
><DIV
CLASS="variablelist"
><DL
><DT
><CODE
CLASS="parameter"
>left_operand</CODE
></DT
><DD
><P
>&#13;       The left operand, as a string.
      </P
></DD
><DT
><CODE
CLASS="parameter"
>right_operand</CODE
></DT
><DD
><P
>&#13;       The right operand, as a string.
      </P
></DD
><DT
><CODE
CLASS="parameter"
>scale</CODE
></DT
><DD
><P
>&#13;       The optional <CODE
CLASS="parameter"
>scale</CODE
> parameter is used to set the
       number of digits after the decimal place which will be used in the
       comparison.  
      </P
></DD
></DL
></DIV
>
  </P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN14090"
></A
><H2
>返回值</H2
><P
>&#13;   Returns 0 if the two operands are equal, 1 if the
   <CODE
CLASS="parameter"
>left_operand</CODE
> is larger than the 
   <CODE
CLASS="parameter"
>right_operand</CODE
>, -1 otherwise.
  </P
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><H2
>范例</H2
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><P
><B
>例 1. <B
CLASS="function"
>bccomp()</B
> example</B
></P
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><code><font color="#000000">
<font color="#0000BB">&lt;?php<br /><br /></font><font color="#007700">echo </font><font color="#0000BB">bccomp</font><font color="#007700">(</font><font color="#DD0000">'1'</font><font color="#007700">, </font><font color="#DD0000">'2'</font><font color="#007700">) . </font><font color="#DD0000">"\n"</font><font color="#007700">;&nbsp;&nbsp;&nbsp;</font><font color="#FF8000">// -1<br /></font><font color="#007700">echo </font><font color="#0000BB">bccomp</font><font color="#007700">(</font><font color="#DD0000">'1.00001'</font><font color="#007700">, </font><font color="#DD0000">'1'</font><font color="#007700">, </font><font color="#0000BB">3</font><font color="#007700">); </font><font color="#FF8000">// 0<br /></font><font color="#007700">echo </font><font color="#0000BB">bccomp</font><font color="#007700">(</font><font color="#DD0000">'1.00001'</font><font color="#007700">, </font><font color="#DD0000">'1'</font><font color="#007700">, </font><font color="#0000BB">5</font><font color="#007700">); </font><font color="#FF8000">// 1<br /><br /></font><font color="#0000BB">?&gt;</font>
</font>
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