[RESOLVED] Math operation on set of numbers (Textbox)

[pourkascheff]

There's a text box containing a set of numbers like example:

9 23 6 17 0 3 5 1

First odd digits are decades and even ones are single ones to create a full numbers (From hex. in dec. base) ignore what I said. Following mathematical actions on specific numbers are needed.

Merging is not allowed. Due to inequality of first part x100 then +second part.

Required function(s) would be like:
(9 *256)+23
(6 *256)+17
(0 *256)+3
(5 *256)+1

How can I do such thing in VB.NET?

It could be discrete in 3 smaller steps as I know but not sure how:

1. Split text from left via " " space character,
2. Multiplying it to 256 then adding to next number (which also separated),
3. Remove those numbers each step to creating a loop to repeat the matter.

[dday9]

Split text from left via " " space character

This can be done using the String.Split method: https://docs.microsoft.com/en-us/dot...m.string.split

Multiplying it to 256 then adding to next number (which also separated)

This can be done using the mathematical operators * and +

Remove those numbers each step to creating a loop to repeat the matter.

You don't need to remove the numbers, but you will need to create a loop. A For/Next loop with the step set to 2 would suffice: https://docs.microsoft.com/en-us/dot...next-statement

Here is an example:

Dim numbers = MyTextBox.Text.Split(" "c, StringSplitOptions.RemoveEmptyEntries)

Dim hex, base, result As Integer
For index = 0 To numbers.Length - 1 Step 2
    If (Not Integer.TryParse(numbers(index), hex) OrElse Not Integer.TryParse(numbers(index + 1), base)) Then
        Throw New Exception("Invalid number")
    End If

    result = hex * 256 + base
    ' do something with result
Next

[Shaggy Hiker]

Yeah, you described it, except I'm not so sure about the third step. Not much point in removing those numbers. Split the string on space, then you can do something like:

For x = 0 to arrayLength-1 Step 2
 result = array(x) * 255 + array(x+1)
Next

At least that's the rough idea. The Step 2 would allow you to work with each pair. I'd want a bit more validation ahead of that, to make sure that the number of array elements is an even number, for example, but that's the rough idea.