## Contents |

Comparing for **equality Floating point** math is not exact. Regards, Snipe windows batch-file floating-point set var share|improve this question edited Sep 20 '14 at 17:05 asked Sep 20 '14 at 16:59 user2912448 add a comment| 2 Answers 2 active oldest That is, if that's the issue. DOS - Arithmetic How to use SET /A for arithmetic in DOS :toDec convert a hexadecimal number to decimal :toHex convert a decimal number to hexadecimal, i.e. -20 to FFFFFFEC or his comment is here

Its first problem is when dealing with zeroes. Whether it deals with them well enough depends on how you want to use it, but an improved version will often be needed. Set /p N1= 1? E.g. http://www.electronicspoint.com/threads/dos-problem.154720/

If both floats are negative then the sense of the comparison is reversed – the result will be the opposite of the equivalent float comparison. Baron, Mar 24, 2009 #17 FatBytestard **Guest On Mon, 23 Mar 2009** 17:06:24 -0700, 1PW <> wrote: >On 03/23/2009 04:47 PM, sent: >> I have a desktop milling machine that is One is that most floating point code is designed to not produce NANs, and in fact most floating point code should treat NANs as an error by enabling floating point divide Could be that he isn't loading his expanded/extended memory correctly as well.

DOS4/GW? Mikics lucidly and sensitively describes for the general reader Derrida's deep connection to his Jewish roots. FatBytestard, Mar 25, 2009 #20 Advertisements Show Ignored Content Page 1 of 2 1 2 Next > Want to reply to this thread or ask your own question? Ieee Floating Point Converter No clue?

If treating infinity as being ‘close’ to FLT_MAX is undesirable then an extra check is needed. Binary Floating Point Representation That is, the smallest subnormal positive number and the smallest subnormal negative number will now compare as being very close – just a few ulps away. more hot questions question feed about us tour help blog chat data legal privacy policy work here advertising info mobile contact us feedback Technology Life / Arts Culture / Recreation Science hop over to this website Using an epsilon value 0.00001 for float calculations in this range is meaningless – it’s the same as doing a direct comparison, just more expensive.

When talking about experimental error it is more common to specify the error as a percentage. How Floating Point Numbers Can Be Represented In Binary Vladimir Vassilevsky DSP and Mixed Signal Design Consultant http://www.abvolt.com Vladimir Vassilevsky, Mar 24, 2009 #2 Advertisements 1PW Guest On 03/23/2009 04:47 PM, sent: > I have a desktop milling machine section... > You could be facing a precision issue or rounding issues.. > > Also, I don't know how you're attempting to start this DOS app > up how ever, there To multiply or divide two FP numbers we may use an auxiliary variable called ONE with the correct number of decimal places.

Don't shoot yourself in the foot (or the head), and make it a single, DOS, FAT volume. http://stackoverflow.com/questions/1503888/floating-point-division-in-a-dos-batch We might write a function like this: // Non-optimal AlmostEqual function - not recommended. Floating Point Arithmetic Pdf One could be the configuration of the FPU, > in the Misc. Floating Point Representation Examples expensive 16550 UARTs were eliminated in favour of including equivalent functionality in all-purpose I/O chips.

With the fixed precision of floating point numbers in computers there are additional considerations with absolute error. http://bigvideogamereviewer.com/floating-point/floating-point-error-c.html Turn off the strict aliasing option using the -fno-strict-aliasing switch, or use a union between a float and an int to implement the reinterpretation of a float as an int. References IEEE Standard 754 Floating Point Numbers by Steve Hollasch Lecture Notes on the Status of IEEE Standard 754 for Binary Floating-Point Arithmetic by William Kahan Source code for compare functions section... >>> You could be facing a precision issue or rounding issues.. >>> >>> Also, I don't know how you're attempting to start this DOS app >>> up how ever, there Floating Point Arithmetic Examples

Sign Up Now! If two numbers are identical except for a one-bit difference in the last digit of their mantissa then this function will calculate intDiff as one. Pawel Paron, Oct 23, 2003, in forum: Electronic Design Replies: 2 Views: 631 Pawel Paron Oct 23, 2003 Tango Plus for DOS Don, Jun 5, 2004, in forum: Electronic Design Replies: weblink Large Integers Working around the limitations of the command processor.

Click this link. Floating Point Rounding Error some of them. These are used for overflows and for the result of divide by zeroes.

This is probably a good thing – it’s equivalent to adding an absolute error check to the relative error check. A float should be 32 bits, but an int can be almost any size. This function might look like this; // Slightly better AlmostEqual function – still not recommended bool AlmostEqualRelative2(float A, float B, float maxRelativeError) { if (A == B) return true; Ieee 754 Floating Point The representation for infinities is adjacent to the representation for the largest normal number.

You could be facing a precision issue or rounding issues.. The IEEE float and double formats were designed so that the numbers are “lexicographically ordered”, which – in the words of IEEE architect William Kahan means “if two floating-point numbers in Join them; it only takes a minute: Sign up Floating point division in a dos batch up vote 9 down vote favorite 2 I need to do a floating-point division in http://bigvideogamereviewer.com/floating-point/floating-point-error-example.html Strictly speaking the C/C++ standard says that the compiler can assume that different types do not overlap in memory (with a few exceptions such as char pointers).

expensive 16550 UARTs were >eliminated in favour of including equivalent functionality in all-purpose >I/O chips. Complications Floating point math is never simple. Echo.The Number Echo.%ans% Echo. Don Anderson is the author of many MindShare books.

Its behavior does not map perfectly to AlmostEqualRelative, but in many ways its behavior is arguably superior. Both are correct. Jim Backus, Sep 25, 2004, in forum: Electronic Design Replies: 3 Views: 616 Jim Backus Sep 26, 2004 Need FoxPro for DOS Robert Baer, Nov 10, 2004, in forum: Electronic Design