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VB.NET Discussion Thread
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Oct 28th, 2006

Help with a problem

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Enter the miles driven, use -1 to end:
Enter the gallons :

The miles / gallon for this tank was

Enter the miles driven, use -1 to end:
Enter the gallons used (-1 to end) :

The miles / gallon for this tank was

Enter the miles driven, use -1 to end:
Enter the gallons used (-1 to end) :

The miles / gallon for this tank was
Enter the miles driven, use -1 to end: -1

The overall average miles/gallon was

I tried to solve this above probem but i cant figure out where i m going wrong or what to do next .. can anyone please help me out with it

VB.NET Syntax (Toggle Plain Text)
Public Sub OverallAverage()
 
 
        Dim miles, gallons As Double
        Dim totalGallons As Double = 0
        Dim totalMiles As Double = 0
        Dim tank As Double = 0
        Dim average As Double = 0
 
 
        Console.Write("Enter the miles driven, use -1 to end: ")
        gallons = Console.ReadLine()
 
        While miles <> -1
 
            Console.Write("Enter the gallons: ")
            gallons = Console.ReadLine()
 
            tank = miles / gallons
            Console.WriteLine("The miles / gallon for this tank was " & tank)
 
            Console.WriteLine("Enter the miles driven, use -1 to end: ")
            miles = Console.ReadLine()
 
            totalGallons = totalGallons + gallons
            totalMiles = totalMiles + miles
 
        End While
 
        average = totalMiles / totalGallons
        Console.Write("The overall average miles/gallon was: " & average)
 
    End Sub
Public Sub OverallAverage()


        Dim miles, gallons As Double
        Dim totalGallons As Double = 0
        Dim totalMiles As Double = 0
        Dim tank As Double = 0
        Dim average As Double = 0


        Console.Write("Enter the miles driven, use -1 to end: ")
        gallons = Console.ReadLine()

        While miles <> -1

            Console.Write("Enter the gallons: ")
            gallons = Console.ReadLine()

            tank = miles / gallons
            Console.WriteLine("The miles / gallon for this tank was " & tank)

            Console.WriteLine("Enter the miles driven, use -1 to end: ")
            miles = Console.ReadLine()

            totalGallons = totalGallons + gallons
            totalMiles = totalMiles + miles

        End While

        average = totalMiles / totalGallons
        Console.Write("The overall average miles/gallon was: " & average)

    End Sub

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vickzbrit

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since Mar 2006

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Oct 28th, 2006

Re: Help with a problem

A couple of things:

(Toggle Plain Text)

        'you had this as gallons should be miles
        miles = Console.ReadLine()

and

(Toggle Plain Text)

            'move this to after calculate totals otherwise changing miles 
before adding to total
            'miles = Console.ReadLine()

            totalGallons = totalGallons + gallons
            totalMiles = totalMiles + miles
            miles = Console.ReadLine()

waynespangler

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Oct 28th, 2006

Re: Help with a problem

Thanks for pointing me out waynespangler.. i made the change for the first one you pointed me out.. but for the second one.. I am confused. If i remove

VB.NET Syntax (Toggle Plain Text)
miles=console.Readline()
miles=console.Readline()

from the top and move it to the bottom after my calculations, it asks for gallons before miles.

And to quite my program when entered -1, I have added the following code

VB.NET Syntax (Toggle Plain Text)
If miles >= 0 Then
 
            average = totalMiles / totalGallons
            Console.WriteLine("The overall average miles/gallon was: " & average)
        Else
            Console.WriteLine("You have chose to quite by pressing -1")
 
        End If
If miles >= 0 Then

            average = totalMiles / totalGallons
            Console.WriteLine("The overall average miles/gallon was: " & average)
        Else
            Console.WriteLine("You have chose to quite by pressing -1")

        End If

now.. when pressed -1, It should also show The overall average miles/gallon. I am not sure where did i make a mistake

Last edited by vickzbrit; Oct 28th, 2006 at 9:05 pm.

vickzbrit

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Oct 29th, 2006

Re: Help with a problem

alright .. i figured it out

.. thankz for helping me out waynespangler

vickzbrit

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