Why does my BASIC project get an "unexpected <" error? - basic

Question

' Gambas class file
' Math Drill by William Teder. Feel free to use parts of the code, but please give me credit.
' Declare Variables
' Define number of times user has pressed the Give Up button
PRIVATE givenuptimes AS Integer
' Define how many questions the user has answered
PRIVATE questionsanswered AS Integer
' Define what level the user is on
PRIVATE level AS Integer
' Define the number of points the user has
PRIVATE points AS Integer
' Define whether ot not addition, subtraction, multiplication, and division are enabled. This value is changed whrn the textboxes are togglrd.
PRIVATE additionenabled AS Boolean
PRIVATE subtractionenabled AS Boolean
PRIVATE multiplicationenabled AS Boolean
PRIVATE divisionenabled AS Boolean
'Set an integer for counting the number of times the program resets, for use in email.
PRIVATE resetcount AS Integer
' Define variable to help in detrmining the problem type
PRIVATE problemtype AS Integer
' Define number of numbers to add when using an addition problem
PRIVATE currentproblem AS String
PRIVATE currentanswer AS String
PRIVATE currentproblempointvalue AS Integer
PRIVATE add1 AS Integer
PRIVATE add2 AS Integer
PUBLIC SUB Form_Open()
'Set inital values
givenuptimes = 0
questionsanswered = 0
level = 1
points = 0
additionenabled = TRUE
subtractionenabled = TRUE
multiplicationenabled = TRUE
divisionenabled = TRUE
' GET RID OF THE FOLLOWING LINE WHEN USED IN BUILDING OR THE PROGRAM WILL NOT WORK!
' currentanswer = 0
makeproblem()
END
PUBLIC SUB btnClearAnswer_Click()
'clear the contents of txtAnswer and give it the focus
txtAnswer.Text = ""
txtAnswer.SetFocus
END
PUBLIC SUB chkGiveUp_Click()
' Check to see if the Give Up button's visible property is set to true, and if it is, hide the button. If it is hidden, show it again.
IF btnGiveUp.Visible = FALSE THEN
btnGiveUp.visible = TRUE
lblhGiveUp.visible = TRUE
lblGivenUp.visible = TRUE
expSettings.Raise
RETURN
END IF
IF btnClearAnswer.Visible THEN
btnGiveUp.Visible = FALSE
lblGivenUp.Visible = FALSE
lblhGiveUp.Visible = FALSE
expSettings.Raise
RETURN
END IF
END
PUBLIC SUB btnGiveUp_Click()
'Increment the counter that shows the number pf times the user has given up by 1
givenuptimes = givenuptimes + 1
lblGivenUp.Text = givenuptimes
'Display the right answer
txtAnswer.Text = currentanswer
WAIT 2
txtAnswer.Text = ""
points = points - 10
lblPoints.Text = points
makeproblem()
END
PUBLIC SUB chkLevels_Click()
' Check to see if the Level label's visible property is set to true, and if it is, hide the label. If it is hidden, show it again.
IF lblLevel.Visible = FALSE THEN
lblhLevel.Visible = TRUE
lblLevel.visible = TRUE
'Move the answered section down one place, if it is not already
lblhAnswered.Top = 150
lblAnswered.Top = 143
'For some odd reason, when the new objects appear they move themselves forward. Re-lowering the Settings container fixes this.
IF lblGivenUp.Visible = FALSE OR lblAnswered.Visible = TRUE THEN
lblhGiveUp.Top = 200
lblGivenUp.Top = 193
END IF
expSettings.Raise
RETURN
END IF
IF lblLevel.Visible THEN
lblLevel.Visible = FALSE
lblhLevel.Visible = FALSE
'Move the answered section up one place
lblhAnswered.Top = 105
lblAnswered.Top = 98
'Check to see if the GiveUp section needs to be moved
IF lblGivenUp.Visible = TRUE AND lblhLevel.Visible = FALSE THEN
lblhGiveUp.Top = 150
lblGivenUp.Top = 143
END IF
'See above comment
expSettings.Raise
RETURN
END IF
END
PUBLIC SUB btnReset_Click()
' Notify user the program is working
lblProblem.Text = "Resetting, please wait..."
'First, reset variables
givenuptimes = 0
questionsanswered = 0
level = 1
points = 0
'Clear the answer textbox.
txtAnswer.Text = ""
'Next, clear interface.
lblAnswered.Text = "0"
lblLevel.Text = "0"
lblPoints.Text = "0"
lblGivenUp.Text = "0"
' Notify user that the reset has finished and that the program is generating a new problem
lblProblem.Text = "Reset complete, generating new problem..."
makeproblem()
END
' These four subs are the same code with different variables. Changes state of variable the checkbox is assigned to, makes it the opposite of it's current state.
PUBLIC SUB chkAddition_Click()
IF divisionenabled = FALSE AND subtractionenabled = FALSE AND multiplicationenabled = FALSE THEN
PRINT Message("You must select at least one option.")
additionenabled = TRUE
chkAddition.Value = TRUE
RETURN
END IF
' Set the boolean additionenabled to be true or false based on it's current state
IF additionenabled = TRUE THEN
additionenabled = FALSE
RETURN
END IF
IF additionenabled = FALSE THEN
additionenabled = TRUE
RETURN
END IF
END
PUBLIC SUB chkSubtraction_Click()
IF additionenabled = FALSE AND divisionenabled = FALSE AND multiplicationenabled = FALSE THEN
PRINT Message("You must select at least one option.")
subtractionenabled = TRUE
chkSubtraction.Value = TRUE
RETURN
END IF
' Set the boolean subtractionenabled to be true or false based on it's current state
IF subtractionenabled = TRUE THEN
subtractionenabled = FALSE
RETURN
END IF
IF subtractionenabled = FALSE THEN
subtractionenabled = TRUE
RETURN
END IF
END
PUBLIC SUB chkMultiplication_Click()
IF additionenabled = FALSE AND subtractionenabled = FALSE AND divisionenabled = FALSE THEN
PRINT Message("You must select at least one option.")
multiplicationenabled = TRUE
chkMultiplication.Value = TRUE
RETURN
END IF
' Set the boolean multiplicationenabled to be true or false based on it's current state
IF multiplicationenabled = TRUE THEN
multiplicationenabled = FALSE
RETURN
END IF
IF multiplicationenabled = FALSE THEN
multiplicationenabled = TRUE
RETURN
END IF
END
PUBLIC SUB chkDivision_Click()
IF additionenabled = FALSE AND subtractionenabled = FALSE AND multiplicationenabled = FALSE THEN
PRINT Message("You must select at least one option.")
divisionenabled = TRUE
chkDivision.Value = TRUE
RETURN
END IF
' Set the boolean divisionenabled to be true or false based on it's current state
IF divisionenabled = TRUE THEN
divisionenabled = FALSE
RETURN
END IF
IF divisionenabled = FALSE THEN
divisionenabled = TRUE
RETURN
END IF
END
' Subroutine to make a problem
SUB makeproblem()
' This is the code that determines a new problem for the user based on a number of factors, including how many problems of that type they have done,
' whether or not the type is enabled or disabled, how quickly they can answer the question, thier points and level, and how many times they have
' given up on that type of problem. The rest is random. DO NOT MESS WITH THIS CODE UNLESS YOU KNOW WHAT YOU ARE DOING! It is very easy to mess up the program,
' as well as generate stack overflow errors.
' Engine version : 0.0.0.1
' Engine by William Teder
' ------------------------------------
' Generates a random number for the Problem Type, 1 - 4
problemtype = Rnd(1, 5)
IF problemtype = 1 THEN
' Problem Type: Addition
lblProblem.Text = "Problem Type: Addition"
' Determine the number of numbers to add together
IF level <= 5 THEN
' Determine how high the number should be
IF points <= 200 THEN
add1 = Rnd(1, 10)
add2 = Rnd(1, 10)
currentanswer = add1 + add2
currentproblem = add2 & " + " & add1
lblProblem.Text = currentproblem
RETURN
END IF
IF points > 200 AND < 400 THEN
add1 = Rnd(1, 20)
add2 = Rnd(1, 20)
add1 + add2 = currentanswer
currentproblem = add2 & " + " & add1
lblProblem.Text = currentproblem
RETURN
END IF
IF points > 400 AND < 500 THEN
add1 = Rnd(1, 30)
add2 = Rnd(1, 30)
add1 + add2 = currentanswer
currentproblem = add2 & " + " & add1
lblProblem.Text = currentproblem
RETURN
END IF
END IF
IF level <= 10 AND >= 6 THEN
' Code for three numbers
END IF
IF level <= 15 AND >= 11 THEN
'Code for 4 numbers
END IF
IF level <= 20 AND >= 16 THEN
' Code for 5 numbers
END IF
IF problemtype = 2 THEN
' Problem Type: Subtraction
lblProblem.Text = "Problem Type: Subtraction"
END IF
IF problemtype = 3 THEN
' Problem Type: Multiplication
lblProblem.Text = "Problem Type: Multiplication"
END IF
IF problemtype = 4 THEN
' Problem Type: Division
lblProblem.Text = "Problem Type: Division"
END IF
END
PUBLIC SUB gotright()
' Increment questions answered counter
questionsanswered = questionsanswered + 1
' Increment Points
points = points + currentproblempointvalue
' For every 100 points, increment the level counter by 1.
IF level = 1 AND points = 200 THEN level = 2
IF level = 2 AND points = 300 THEN level = 3
IF level = 3 AND points = 400 THEN level = 4
IF level = 4 AND points = 500 THEN level = 5
IF level = 5 AND points = 600 THEN level = 6
IF level = 6 AND points = 700 THEN level = 7
IF level = 7 AND points = 800 THEN level = 8
IF level = 8 AND points = 900 THEN level = 9
IF level = 9 AND points = 1000 THEN level = 10
IF level = 10 AND points = 1100 THEN level = 11
IF level = 11 AND points = 1200 THEN level = 12
IF level = 12 AND points = 1300 THEN level = 13
IF level = 13 AND points = 1400 THEN level = 14
IF level = 14 AND points = 1500 THEN level = 15
IF level = 15 AND points = 1600 THEN level = 16
IF level = 16 AND points = 1700 THEN level = 17
IF level = 17 AND points = 1800 THEN level = 18
IF level = 18 AND points = 1900 THEN level = 19
IF level = 19 AND points = 2000 THEN level = 20
' Change font color of the textbox to green to let the user know he/she got the problem right
txtAnswer.Foreground = &H579524&
' Create delay to let the user know they got the answer right
WAIT 1
' Change back to regular color
txtAnswer.Foreground = &HFF004&
END
PUBLIC SUB txtAnswer_KeyRelease()
IF txtAnswer.Text = currentanswer THEN
txtAnswer.Foreground = &H579524&
questionsanswered = questionsanswered + 1
lblAnswered.Text = questionsanswered
WAIT 0.25
txtAnswer.Text = ""
' Change back to regular color
txtAnswer.Foreground = &HFF0004&
lblPoints.text = points
makeproblem()
END IF
END
PUBLIC SUB Button1_Click()
makeproblem()
END
At line 251, there is an unexpected >. Why does it fail to compile? Thanks.

Answer 1

IF points > 400 AND < 500 THEN
That doesn't look quite right to me, unless your BASIC is really advanced (and it appears GAMBAS isn't quite that advanced). It should be:
IF points > 400 AND points < 500 THEN
You have the right idea with this line, for example:
IF lblGivenUp.Visible = TRUE AND lblhLevel.Visible = FALSE THEN
Same for all the variations you have of this, you need to include the variable on the right hand side of the and as well):
IF points > 200 AND < 400 THEN
IF points > 400 AND < 500 THEN
IF level <= 10 AND >= 6 THEN
IF level <= 15 AND >= 11 THEN
IF level <= 20 AND >= 16 THEN