Declaring an array

[dejavu33]

Hi!

I dont understand arrays very much. Im trying to create an array of up to 100 positive numbers with the use of -1 to stop entering if the user needs an array containing less than 100 elements.

Ive seen them declared many ways but since im want to create an array of up to 100, Im using the following:

Dim array as integer()
Array=new integer (0 to 100) {}
 
Console.Write("Please enter the value (-1 to stop)")
        For i As Integer = 0 To array.GetUpperBound(0)
 
        Next

Am I declaring it correctly? When I run the program, I cant input a number. Am I missing a step?

[Killer42]

Do you have anything inside the For...Next loop?

[dejavu33]

For i As Integer = 0 To array.GetUpperB ound(0)
Console.Write(i & vbTab & array(i))
Next



This gives me the 100 positive numbers in the array but what i wanted to do was to have the user input the numbers

For example:
Please enter the value (-1 to stop):
6
Please enter the value (-1 to stop):
4
Please enter the value (-1 to stop):
-1

x1[0]=6
x2[1]=4


So, im assuming that my array is wrong right?

[Killer42]

...This gives me the 100 positive numbers in the array but what i wanted to do was to have the user input the numbers
...
So, im assuming that my array is wrong right?

As far as I know (not really familiar with your version of VB) your array is probably OK. But there is nothing in your code to indicate a user input. All I can see you doing is writing the values from your array onto the console. I expect that will come out as all zeroes.

[dejavu33]

Ok i decided to go another way with this problem and this is what i have so far:

 Dim numbers As Integer    'An array for storing the input values.
        Dim numCt As Integer()    'The number of numbers saved in the array.
        Dim num As Integer         'One of the numbers input by the user.
 
        numbers = New Integer(0 To 99) {}  <<---I get an error here saying     Value of type '1-dimensional array of Integer' cannot be converted to 'Integer'   What does this mean?
 
 
        numCt = New Integer(0) {}
 
        Console.Write(" Please enter the value (-1 to stop): " & vbTab)
        numbers = Console.ReadLine()
 
        'Get the numbers and put them in the array
        While (True)
            num = Console.ReadLine()
            If (num <= 0) Then
 
            End If
        End While
 
        Console.Write("Please enter the value (-1 to stop): " & vbTab)
        numbers = Console.ReadLine()
    End Sub
 
End Module

And here is what im trying to do:
-allow a user to create an array of up to 100 positive numbers with the use of -1 to stop entering if user needs an array containing less than 100 elements


Can anyone tell me if im on the right track? or even close? or am i just way off?

Any help would be appreciated. Thank you.

[SammyB]

You are close to being correct: just a little confused. I rearranged your code just a little bit:

Dim iNums(0 To 99) As Integer 'The array.
Dim num As Integer 'One of the numbers input by the user.
Dim i As Integer
i = 0
num = 0
Console.Write("Please enter the value (-1 to stop): " & vbTab)
Do
    num = Console.ReadLine()
    If (num <> -1) Then
        iNums(i) = num
        i = i + 1
    End If
Loop Until (num = -1 Or i = 100)

Do you see now how to define the array? Now, add a loop at the end that prints out the array. HTH --Sam

[Killer42]

...<<---I get an error here saying Value of type '1-dimensional array of Integer' cannot be converted to 'Integer' What does this mean?

numbers is not defined as an array - just a single (um... "scalar" I think they call it) Integer variable. I can't tell you how to fix it though, as this is a later version of VB than I'm familiar with.

[dejavu33]

Oh, ok. I see how to define the array now. Yes, you are correct...I was somewhat confused. Thank you SammyB for your help.

I just have another question. I added another loop at the end of the code to display my output. But, everytime i run the program...it doesnt display it.
This is what i added:

Console.WriteLine("x1" & vbTab & "x2")
For j As Integer = 0 To array.GetUpperBound(0)
            Console.Write(i & vbTab & array(i))
        Next

i dont think i need another loop do i? i just dont understand why its not displaying.

[SammyB]

Console.WriteLine("x1" & vbTab & "x2")
For j As Integer = 0 To array.GetUpperBound(0)
Console.Write(i & vbTab & array(i))
Next

Your loop variable is j
You used i to index the array

Welcome to loops! (^o^)

[dejavu33]

hehehe...thank you. I guess ive been staring at the computer screen for the longest that i cant see the small mistakes anymore.

Hey by any chance do you know if there is a way to make two copies of an array. For example, If i wanted to make two copies of the data inputted by the user in the above array? If so, how could that be done. I think I read somewhere that it could be done but dont know how and ive tried looking it up online for information but cant find any information on it.