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FOX Calculator
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Latest Version: 1.1.0 <BR>
Release Date: Oct, 16, 2001 <BR>
Author: Jeroen van der Zijp<BR>
License: GPL<BR>
Supported Platforms: Linux,Unix,Windows 95/98/ME/NT/2000<BR><BR>
<A CLASS='PAGEMENULINK' href='#intro'>Introduction</A><BR>
<A CLASS='PAGEMENULINK' href='#config'>Configuration</A><BR>
<A CLASS='PAGEMENULINK' href='#number'>Entering Numbers</A><BR>
<A CLASS='PAGEMENULINK' href='#oper'>Operators</A><BR>
<A CLASS='PAGEMENULINK' href='#tri'>Trigonometric Functions</A><BR>
<A CLASS='PAGEMENULINK' href='#other'>Other Functions</A><BR>
<A CLASS='PAGEMENULINK' href='#limits'>Limits</A><BR>
<A CLASS='PAGEMENULINK' href='download.html#calculator'>Download</A><BR>
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<B><A name='intro'>Introduction.</A></B><P>
<DIV CLASS='NEWSSECTION'>
The FOX Calculator is a simple desktop calculator geared toward the programmer. It supports not only a full complement scientific functions, but also common operations that programmers need, such as bitwise operations, bitwise shifting, and base-2 logarithm and exponents, and numeric conversion between hexadecimal, octal, binary, and decimal.<BR>
The FOX Calculator implements correct operator precedences, so expressions like 2+3*5 yield the correct result, which is 17, and not 25.<BR>
Also featured is a constant memory, which permanently stores its value even if you exit the calculator and restart it later.<BR>
</DIV>
<P>
<B><A name='config'>Configuration</A></B><P>
<DIV CLASS='NEWSSECTION'>
Pressing on the calculator icon brings up the Calculator Preferences dialog. The Calculator Preferences dialog comprises three settings:
<P>
<UL>
<LI>Settings for the calculator itself</LI>
<LI>Color settings of the button groups</LI>
<LI>Information about the calculator </LI>
</UL>
<P>
<IMG src='screenshots/foxcalc_prefdialog_01_small.jpg' border=0 alt='pref dialog' align=right>
In the Calculator settings panel, you can change font used for the display, by pressing the "Set..." button to bring up the standard Font Selection Dialog.<BR>
You can change the way numbers are printed as well. Checking "Always show exponent" will cause the calculator display always to display the number in exponential notation.<BR>
Checking "Never show exponent" will cause the calculator to render the number in simple dot notation. The precision can be set by means of the spin button; the default precision is set to 16.<BR>
Finally, the calculator can be set to beep when errors occur.
<BR clear=all>
<P>
<IMG src='screenshots/foxcalc_prefdialog_02_small.jpg' border=0 alt='pref dialog' align=right>
In the Color settings panel, you can change the colors of the various button groups.
The buttons are grouped by function; the numbers are in one group, and the operators are in another, and so on.
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<IMG src='screenshots/foxcalc_prefdialog_03_small.jpg' border=0 alt='pref dialog' align=right>
In the About panel, some information is presented about the calculator, like version number and author's contact.
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</DIV>
<P>
<B><A name='number'>Entering Numbers</A></B><P>
<DIV CLASS='NEWSSECTION'>
You can enter a number by clicking on the digit buttons, or simply hit the right digit on the keyboard. Numbers in exponential notation are entered by entering the mantissa first, then hitting the "EXP" button, and then entering the exponent. Up to 3 digits may be entered for the exponent; entering more than 3 will cause the digits to shift, i.e. the first digit entered will be dropped and replaced by the second, the second digit will be replaced by the third, and the third will be replaced by the new input.
Changing the sign of the exponent is accomplished by hittin the "+/-" button.
At any time, you can hit the Backspace key to delete the last digit entered.
Two numbers, pi and e (euler's number) may be entered with a single button:
<P>
<UL>
<LI>pi	Enters the number 3.1415926535897932384626433833</LI>
<LI>e	Enters the number 2.7182818284590452353602874713 (hit the "inv" button first)</LI>
</UL>
</DIV>
<P>
<B><A name='oper'> Operators</A></B><P>
<DIV CLASS='NEWSSECTION'>
The operators in the FOX Calculator are the usual suspects:
<P>
<UL>
<LI>+	Addition </LI>
<LI>-	Substraction</LI>
<LI>*	Multiplication</LI>
<LI>/	Floating point division </LI>
</UL>
<P>
In addition, FOX Calculator also includes bitwise operators, such as:
<P>
<UL>
<LI>AND	Bit-wise logical and </LI>
<LI>OR	Bit-wise logical or </LI>
<LI>XOR	Bit-wise logical exclusive or </LI>
<LI>NOT	Bit-wise logical not </LI>
<LI>SHL	Bit-wise shift left </LI>
<LI>SHR	Bit-wise shift right </LI>
<LI>SAR	Bit-wise signed shift right (hit the "inv" button first) </LI>
</UL>
<P>
Also nice for programmers is the inclusion of integer operations:
<P>
<UL>
<LI>mod	Integer modulo </LI>
<LI>div	Integer division (hit the "inv" button first)</LI>
</UL>
<P>
All the operators have certain precedence relations with each other, so that an expression is evaluated correctly.
</DIV>
<P>
<B><A name='tri'>Trigonometric Functions</A></B><P>
<DIV CLASS='NEWSSECTION'>
<P>
The Calculator incorporates the usual trigonometric functions:
<UL>
<LI>sin	Sine</LI>
<LI>cos	Cosine</LI>
<LI>tan	Tangent</LI>
<LI>asin	Inverse sine or arc sine (hit the "inv" button first)</LI>
<LI>acos	Inverse cosine</LI>
<LI>atan	Inverse tangent</LI>
<LI>sinh	Hyperbolic sine (hit the "hyp" button first)</LI>
<LI>cosh	Hyperbolic cosine</LI>
<LI>tanh	Hyperbolic tangent</LI>
<LI>asinh	Inverse hyperbolic sine (hit the "hyp" and "inv"buttons first)</LI>
<LI>acosh	Inverse hyperbolic cosine</LI>
<LI>atanh	Inverse hyperbolic tangent</LI>
</UL
<P>
For the first 6 functions, the angle mode determines whether the argument is specified in terms of degrees, radians, or grad. Note that the angle mode is preserved across invocations of the Calculator.
</DIV>
<P>
<B><A name='other'>Other Functions</A></B><P>
<DIV CLASS='NEWSSECTION'>
Other functions supported by the calculator are the following:
<P>
<UL>
<LI>log	Base 10 logarithm </LI>
<LI>ln	Natural logarithm</LI>
<LI>2log	Base 2 logarithm</LI>
<LI>x!	Factorial</LI>
<LI>nPr	Permutations</LI>
<LI>nCr	Combinations</LI>
<LI>sqrt	Square root</LI>
<LI>x^y	X raised to the power y</LI>
<LI>1/x	Reciprocal</LI>
<LI>10^x	Base 10 exponentiation (hit the "inv" button first)</LI>
<LI>e^x	Exponentiation</LI>
<LI>2^x	Base 2 exponentiation</LI>
<LI>x^1/y	X raised to the power 1/y</LI>
<LI>x^2	X squared</LI>
</UL>
</DIV>
<P>
<B><A name='limits'>Limits</A></B><P>
<DIV CLASS='NEWSSECTION'>
The calculator works in IEEE 746 double precision mode; for bit-wise operations, it uses 32 bit integers. Thus, the numeric limits are as follows:
<P>
<UL>
<LI>Smallest real number:	2.2250738585072010e-308</LI>
<LI>Largest real number:	1.7976931348623158e+308</LI>
<LI>Smallest integer number:	0</LI>
<LI>Largest integer number:	4294967295</LI>
</UL>
<P>
</DIV>
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<address>Copyright 1997-2002 <a href=mailto:jeroen@fox-toolkit.org>Jeroen van der Zijp</a></address>
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