Solved

round UP to next biggest .5 or 0, e.g. 20.3-->20.5 & 28.8-->30, am i bound to a case statement? i tried good few functions already

Posted on 2004-10-07
5
315 Views
Last Modified: 2008-02-01
hi, i need help on a round function and all it needs to do is always ROUND UP to the next half.

functions i've tried:
   Private Function MyRound(ByVal aNumber As Single) As Single
        If aNumber < 0 Then
            Return CSng(Microsoft.VisualBasic.Fix((aNumber - 0.25) * 2) / 2)
        Else
            Return CSng(Microsoft.VisualBasic.Fix((aNumber + 0.25) * 2) / 2)
        End If
    End Function

    Public Function Round5(ByVal d As Double) As Double
        Return Math.Round(d * 2) / 2
    End Function

am i bound to making a case statement, cause id absolutely learn nothing from it.
thanks!
0
Comment
Question by:jxharding
5 Comments
 
LVL 25

Expert Comment

by:RonaldBiemans
ID: 12246533
Hi jxharding,

a question

24.4 -> 20
25.0 -> 30


0
 

Author Comment

by:jxharding
ID: 12246593
hi ronaldbiemans

sorry , i made a error in the heading.
it only needs to update to the next half, "28.8-->30" should be 28.8-->29.0
thus if the first decimal place is bigger than 0 and smaller than 5, the first decimal place must then be .5
else
if the first decimal is bigger than 5, then the non decimal must +1 and, the decimal must be .0.
thanks!



0
 
LVL 3

Accepted Solution

by:
eekj earned 250 total points
ID: 12246602
Dim d As Double = 20.3
 MsgBox((Math.Round(Math.Round(d * 2), 0)) / 2.ToString)   'Displays 20.5

 Dim e As Double = 28.8
 MsgBox((Math.Round(Math.Round(e * 2), 0)) / 2.ToString)   'Displays 29
0
 
LVL 6

Assisted Solution

by:zulu_11
zulu_11 earned 250 total points
ID: 12246700
Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
        Dim dbnum As Double
        dbnum = dbnum.Parse(tbNum.Text)
        If Math.Round(dbnum) < dbnum Then
            dbnum = Math.Round(dbnum) + 0.5
        Else
            dbnum = Math.Round(dbnum)
        End If
        MsgBox(dbnum)
    End Sub

i tested the above function for the following

28.1 - 28.5 --> 28.5
28.6 - 28.9 --> 29

hope this helps

Zulu
0
 
LVL 6

Expert Comment

by:zulu_11
ID: 12246708
oh! and the tbNum is a text field in which i take an input of the number to test...
0

Featured Post

Free Tool: ZipGrep

ZipGrep is a utility that can list and search zip (.war, .ear, .jar, etc) archives for text patterns, without the need to extract the archive's contents.

One of a set of tools we're offering as a way to say thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
How to retrieve a mysql date column that has 0000-00-00 in vb.net 8 43
Footer for each row on Gridview 2 33
Passing data between Forms 3 20
VB.Net. Reading xml value 6 30
Introduction As chip makers focus on adding processor cores over increasing clock speed, developers need to utilize the features of modern CPUs.  One of the ways we can do this is by implementing parallel algorithms in our software.   One recent…
If you need to start windows update installation remotely or as a scheduled task you will find this very helpful.

828 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question