-- Scriptnaam: Optellen.lua
-- Auteur: Aaron Imming
-- Datum: Vandaag

intX        = 1
intY        = 1
operator    = "+"

function veranderOperator()
    if Keys.newPress.A then
        operator = "+"
    elseif Keys.newPress.B then
        operator = "-"
    elseif Keys.newPress.X then
        operator = "*"
    elseif Keys.newPress.Y then
        operator = "/"
    end
end

function waardeOphogen()
    if Keys.newPress.Up then
        intX = intX + 1
    elseif Keys.newPress.Down then
        intX = intX - 1
    elseif Keys.newPress.Left then
        intY = intY + 1
    elseif Keys.newPress.Right then
        intY = intY - 1
    end
end

function berekenSom()
    if operator == "+" then
        return intX + intY
    elseif operator == "-" then
        return intX - intY
    elseif operator == "*" then
        return intX * intY
    elseif operator == "/" then
        return intX / intY
    end
end

function drawScreen()
    startDrawing()
        screen.print(SCREEN_UP, 0, 0, "Press START to stop.")
        screen.print(SCREEN_UP, 0, 10, "Press A, B, X or Y to see what happens.")
        screen.print(SCREEN_DOWN, 10, 100, "x: " .. intX)
        screen.print(SCREEN_DOWN, 10, 110, "y: " .. intY)
        screen.print(SCREEN_DOWN, 10, 120, "operator: " .. operator)
        screen.print(SCREEN_DOWN, 10, 130, "Het antwoord van " .. intX .. " " .. operator .. " " .. intY .. " is: " .. berekenSom())

    stopDrawing()
end

while not Keys.newPress.Start do
    Controls.read()
    waardeOphogen()
    drawScreen()
end