expdouble.html
来自「Java方面的数值算法」· HTML 代码 · 共 442 行 · 第 1/2 页
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<A NAME="ExpDouble(double, int)"><!-- --></A><H3>
ExpDouble</H3>
<PRE>
public <B>ExpDouble</B>(double x,
int maxdigits)</PRE>
<DL>
<DD>Creates an ExpDouble from a double, with the specified number of digits.
<P>
<DL>
<DT><B>Parameters:</B><DD><CODE>x</CODE> - <DD><CODE>maxdigits</CODE> - </DL>
</DL>
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<A NAME="round(int)"><!-- --></A><H3>
round</H3>
<PRE>
public boolean <B>round</B>(int ndigits)</PRE>
<DL>
<DD>Round this instance to the number of significant digits
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>digits</CODE> -
<DT><B>Returns:</B><DD>whether magnitude and digits had to be changed by rounding values >9.5 to 10</DL>
</DD>
</DL>
<HR>
<A NAME="toString()"><!-- --></A><H3>
toString</H3>
<PRE>
public java.lang.String <B>toString</B>()</PRE>
<DL>
<DD><DL>
<DT><B>Overrides:</B><DD><CODE>toString</CODE> in class <CODE>java.lang.Object</CODE></DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>string representation of this object</DL>
</DD>
</DL>
<HR>
<A NAME="toExpString()"><!-- --></A><H3>
toExpString</H3>
<PRE>
public java.lang.String <B>toExpString</B>()</PRE>
<DL>
<DD><DL>
<DT><B>Returns:</B><DD>a string representation in exponential notation</DL>
</DD>
</DL>
<HR>
<A NAME="debug()"><!-- --></A><H3>
debug</H3>
<PRE>
public java.lang.String <B>debug</B>()</PRE>
<DL>
<DD><DL>
<DT><B>Returns:</B><DD>a debug string with the part of this ExpDouble</DL>
</DD>
</DL>
<HR>
<A NAME="toDoubleUnsigned()"><!-- --></A><H3>
toDoubleUnsigned</H3>
<PRE>
public double <B>toDoubleUnsigned</B>()</PRE>
<DL>
<DD><DL>
<DT><B>Returns:</B><DD>double representation of this object according to rounding.</DL>
</DD>
</DL>
<HR>
<A NAME="toDouble()"><!-- --></A><H3>
toDouble</H3>
<PRE>
public double <B>toDouble</B>()</PRE>
<DL>
<DD><DL>
<DT><B>Returns:</B><DD>double representation of this object according to rounding.</DL>
</DD>
</DL>
<HR>
<A NAME="parts()"><!-- --></A><H3>
parts</H3>
<PRE>
protected java.lang.String[] <B>parts</B>()</PRE>
<DL>
<DD><DL>
<DT><B>Returns:</B><DD>string array of the integer and fraction parts</DL>
</DD>
</DL>
<HR>
<A NAME="formatExponential(double, int)"><!-- --></A><H3>
formatExponential</H3>
<PRE>
protected boolean <B>formatExponential</B>(double x,
int ndigits)</PRE>
<DL>
<DD>formats the number into a mantissa with interval in interval [1,10)E{ndigits} and an exponent.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>x</CODE> - the number<DD><CODE>ndigits</CODE> - the number of significant digits</DL>
</DD>
</DL>
<HR>
<A NAME="orderOfMagnitude(double)"><!-- --></A><H3>
orderOfMagnitude</H3>
<PRE>
public static int <B>orderOfMagnitude</B>(double x)</PRE>
<DL>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>x</CODE> -
<DT><B>Returns:</B><DD>order of magnitue of x, i.e., n : x in [ 10^n, 10^(n+1) )</DL>
</DD>
</DL>
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