Programming questions

Question

this question is stressing me out i cant even know what to start. it is in Visual Basic. Design a program that calculates and displays the number of miles per hour over the speed limit that a speeding driver was doing. The program should ask for the speed limit and the driver's speed. Validate the input as follows:
-The speed limit should be at lease 20, but not greater than 70.
-The driver's speed should be at least the value entered for the speed limit (otherwise the driver was not speeding).

Once correct data has been entered, the program should calculate and display the number of miles per hour over the speed limit that the driver was doing.

Answer 1

You should only be prompting once for the speed limit (or repeatedly if you get bad data), and once for the user's current speed. I'd use the actual numbers to determine if it's valid data or not, rather than a string set to "yes" or "no".  Try picking it up from here:

 

Module Module1
 Sub Main()
  Console.WriteLine("Please enter speed limit, if it's between 19 and 71 mph, then press enter")
  Dim speed_limit As Integer

 

  speed_limit = Integer.Parse(Console.ReadLine())
  Console.WriteLine("You entered:" & speed_limit)

  While speed_limit < 20 Or speed_limit > 70

   If speed_limit < 20 Then
    message = "Sorry, speed limit less than 20 mph. Try again "
   ElseIf speed_limit > 70 Then
    message = "Sorry, speed limit more than 70 mph.Try again."
   End If

   Console.WriteLine(message)

   speed_limit = Integer.Parse(Console.ReadLine())
  End While

 

  Console.WriteLine("How fast are you driving?")

  Dim car_speed As Integer

  car_speed = Integer.Parse(Console.ReadLine())
  If car_speed > valid_speed_limit Then
   message = "Alert! You are driving over the speed limit"
  Else

   message = "You are driving at or under the speed limit."
  EndIf
  Console.WriteLine(message)
 End Sub
End Module