Split A Double Value Inputted Into A String To Decimal And Fractional?
Feb 28, 2009
Simple requirement to split a double value inputted into a string to decimal and fractional.I enter 12.1 and it splits it into
12 and then 0.0999999999999996
Where is my 0.0000000000000004 gone??? Did the cpu tax it?I have tried a few other tricks to split the number and i get the same result...The fractional results of each attempt
I am creating a math related class and one of the problems I have been having was how to create a function to return the fractional part of a double as an integer. I could easily do that if there was a way I could get the length of the digits.
-3.141 should return 3 -0.125 should return 3 -0.5 should return 1 -0.4545 should return 4
I would like to do this without using string manipulation. So far all I have gotten on the web is unanswered questions. I thought of using log, but it doesn't give the desired result when working with numbers < 0
I'm having some trouble converting a double to a string.I have a double value, like 43.64 and I need a string like this: "43.64"If I try to convert the double to a string I always get "43,64" what doesn't work for me..
For greater accuracy I should use a Decimal instead of a Double ( so I've been told ). Why then have Microsoft chosen to use DOUBLE for most of the functions that return a floating point value in the Math Class?
Is there a way to get the fraction parts of a Double without using string manipulations? Specifically in vb.net?
There are numerous examples for a decimal in various languages. One for vb.net is this one
Basically they all seem to use either a mod or Truncate method or they take advantage of casting to integer behavior. But none of those approaches will work for a double/float type due to the inherent inaccuracy of the double/float type. There is also the problem that doubles don't cast to decimals reliably. Below is a test case to show what I mean and expect.
<TestClass> _ Public Class BasicNumberTests Function DecimalFractionalPart(ByVal number As Decimal) As Decimal
I'm making a program and was wondering if someone could please help me (its a console app) to display words from a string that the user has inputted starting with certain characters?
I am trying to split a long string based on an array of words. For Example:Words: trying, long, array Sentence: "I am trying to split a long string based on an array of words."Resulting string array:Multiple instances of the same word is likely, so having two instances of trying cause a split, or of array, will probably happen.
Let's say I want to convert a Double x to a Decimal y. There's a lot of ways to do that:
1. var y = Convert.ToDecimal(x); // Dim y = Convert.ToDecimal(x) 2. var y = new Decimal(x); // Dim y = new Decimal(x) 3. var y = (decimal)x; // Dim y = CType(x, Decimal) 4. -- no C# equivalent -- // Dim y = CDec(x)
Functionally, all of the above do the same thing (as far as I can tell). Other than personal taste and style, is there a particular reason to choose one option over the other?
EDIT: This is the IL generated by compiling the three C# options in a Release configuration:
1. call valuetype [mscorlib]System.Decimal [mscorlib]System.Convert::ToDecimal(float64) --> which calls System.Decimal::op_Explicit(float64)
I am working on an application that allow the user to store data as numbers.These numbers are later on used for calculation. The number can be of any type and are saved as string. The problem is when they are used for calculation how can understand when it is better to treat them as doubles and when as decimals?
How come a double and decimal treat 3 and 3.0 and 3.00 different?
For example:
Dim dbl As Double = 1 / CInt(TextBox1.Text) MsgBox(dbl) If I enter 3 in the TextBox I get: 0.33... If I enter 3.0 I get: 0.033... If I enter 3.00 I get: 0.0033...
So, yes, I've tried with these three formats, and the problem remains the same:I have a string, "s"For Each s As String In stringarray and this array is recieving data from a streamreader that is reading a csv file. The data I'm having dificulty reading are these very specific numbers(yes, only these numbers, because phone numbers get home safe and sound).The numbers I'm talking about are usually decimal.ValueList.Add(Convert.ToDecimal(s))
Now, when I convert them like that, they always bring a "D" alongside with them. I've personally checked the string multiple times, and it just has a "1", and somehow, my list recieves "1D" as a number, same thing happens with decimal numbers(0.29D for example). I've tried with Doubles and Integers, the result is the same.
here is a very important matter to be corrected as soon as possible. generally,type double can display an answer correct to more than 20 decimal places. yes,it works fine until here except for exponential system. whenever i try to find a decimal raised to the power of a proper fraction, i get a correct answer but only upto 13 decimal places. that is not fair at all! it is important to get as high precision as possible. consider this example:-
[code...]
i want that number of correct decimal places or approximation,which a windows 7 calculator has. i believe that this is someway easy to get rid of. please support.it is important for programs like calculator,worksheets,databases,etc.
I am writing a program that asks the user for their name and the number of pieces they completed. The employees are paid more depending on the amount of pieces they have completed(i.e. <200 = .50 per piece, 200 to 399 = .55 per piece, etc.). I have to display the amount earned when the user enters the info and hits the calculate button. I have to use Select Case.
I was thinking this would be an easy program but I keep getting an error for each Case saying "Option Strict On disallows implicit conversions from 'Double' to 'Decimal'. I don't understand why it thinks it is a double. It says I can correct this problem by adding "Cdec" before each equation(i.e.
Dim Latitude As Double = row("fltLatitude") Dim Longitude As Double = row("fltLongitude")
Most of the lat/longs that are being fetched from the db using SP are retrieved in properly, except for a couple of records which do not include a period to indicate a lat/long value.I have tried using these:
Is there such a thing as a type similar to a point, but contains a pair of decimals, or a pair of doubles, rather than integers? I searched the forums and google with no luck. I can't believe this has never come up before, I must have been using the wrong search terms.
In the discussion in this thread: [URL] it was reveiled to me that vb.net, using double, could only calculate values up to 18 digits after decimal.... so I started thinking and came up with this class
Public Class LargeNumber Private pNumber As String
Public Sub New()
[CODE].............
I want to split the string into a series of doubles.... and than combine them into a large number.... The size of each double component should be 18 digits on a 32 bit computer... so that I will have room to add the last carrier...
I'm trying to split a Yahoo historical stock price csv file, downloaded into a string, by what looks like a space character. I want a new row for each split. The split function works for other characters I see in the string. I suspect the characters may be a non breaking space character but I've been unable to split on them. This is the test csv file that is downloaded into the string: [URL] I'm trying to split the string like this:
These is the content of my txt file which is saved in D drive in my pc abc,1,2,3..I tried the flowing but it didn't work:[code]I am getting error on this line.. data = line.Split(","c)...it says this line isn't in use anymore or something and that I rather use LineInput but thats asks for filenumber and i don't know what that is. I am sorry but I am a complete beginner. what else can I try? [code]ok that error is gone now but now if I want to add these values to a list box..how can i do that?
I'm trying to parse csv file with VB.NET.csv files contains value like 0,"1,2,3",4 which splits in 5 instead of 3. There are many examples with other languages in Stockoverflow but I can't implement it in VB.NET.Here is my code so far but it doesn't work...
Dim t As String() = Regex.Split(str(i), ",(?=([^""]*""[^""]*"")*[^""]*$)")
