calctest

os.loadAPI("button")
m = peripheral.wrap ("top")
m.clear()

function centerText(text)
  w, h = m.getSize()
  m.setCursorPos(math.floor(w/2-#text/2+.5), h/2+.5)
  m.write(text)
  m.scroll(1)

end
m.setCursorBlink(false)
centerText("Hello World!")
os.sleep(.15)
m.clear()
button.heading("Calculatron 9000")
m.setCursorBlink(true)
usenmst1 = true
cng = 1
cng2 = 1
numset2= {}
numset1= {}
for i = 1,100 do
  numset1[i] = ""
  numset2[i] = ""
end
oppcanhap = false
shouldclear = false


function numPad()
  button.setTable("C",clear,12,15,22,24)
  button.setTable("1", one, 2,5,10,12)
  button.setTable("2", two, 7,10,10,12)
  button.setTable("3", three, 12,15,10,12)
  button.setTable("4", four, 2,5,14,16)
  button.setTable("5", five, 7,10,14,16)
  button.setTable("6", six, 12,15,14,16)
  button.setTable("7", seven, 2,5,18,20)
  button.setTable("8", eight, 7,10,18,20)
  button.setTable("9", nine, 12,15,18,20)
  button.setTable("0", zero, 7,10,22,24)
  button.setTable("+", add, 17,20,10,12)
  button.setTable("-", sub, 17,20,14,16)
  button.setTable("*", multi, 17,20,18,20)
  button.setTable("/",div,17,20,22,24)
  button.setTable("=",equal,2,5,22,24)
  button.setTable("exit", exit, 25,29,22,24)
  button.setTable("crash", crash , 24,29,18,20)

  button.screen()
end

function getClick()
  event,side,x,y=os.pullEvent("monitor_touch")
  button.checkxy(x,y)
end
function clear()
  button.flash("C")
  clearline()
end
function clearline()
oppcanhap=false
usenmst1= true
shouldclear=false
  i = 0
  for i = 0,30 do
  i= i+1
   m.setCursorPos(i,5)
    m.write(" ")
    cng = 1
  end
  for i = 1,100 do
    numset1[i]=""
    numset2[i]=""
  end
 m.setCursorPos(4,5)
 cng = 1
 cng2 = 1
end
function emptyLine()
  for i = 0,30 do
    i = i+1
    m.setCursorPos(i,5)
    m.write(" ")
    cng = 1
    cng2 = 1
  end
end
function exit()
  button.toggleButton("exit")
  os.reboot()
end
function setNum(nm)
  button.flash(nm)
  if shouldclear==true then
    clearline()
  end
  if usenmst1 == true then
    numset1[cng] =nm
    m.setCursorPos(5+cng,5)
    cng = cng+1
    print(usenmst1)
    m.write(nm)
    oppcanhap=true
  elseif usenmst1==false then
    numset2[cng2]=nm
    m.setCursorPos(5+cng2,5)
    cng2=cng2+1
    print(usenmst1)
    m.write(nm)
  end
end
function one()
  setNum("1")
end
function two()
   setNum("2")
end
function three()
  setNum("3")
end
function four()
  setNum("4")
end
function five()
  setNum("5")
end
function six()
   setNum("6")
end
function seven()
  setNum("7")
end
function eight()
  setNum("8")
end
function nine()
  setNum("9")
end
function zero()
  setNum("10")
end
function equal()
button.flash("=")
    if opptype == "add" then
        nst2 = table.concat(numset2)
  nst1 = table.concat(numset1)
        opt = nst1 + nst2
        printOut(opt)
    print(nst1)
 print(nst2)
    elseif opptype == "subtract" then
  nst2 = table.concat(numset2)
  nst1 = table.concat(numset1)
  opt = nst1-nst2
  printOut(opt)
    elseif opptype == "multiply" then
  nst2 = table.concat(numset2)
  nst1 = table.concat(numset1)
  opt = nst1*nst2
  printOut(opt)
    elseif opptype == "divide" then
  nst2 = table.concat(numset2)
  nst1 = table.concat(numset1)
  opt = nst1/nst1
  printOut(opt)
    else
  clearLine()
  print(Err)
  sleep(2)
  clearLine()
    end
 shouldclear=true
end
function printOut(opt)
clearline()
m.write(opt)
end
function add()
  if oppcanhap == true then
   button.flash("+")
  opptype = "add"
  usenmst1=false
  emptyLine()
  end
end
function sub()
  if oppcanhap==true then
    button.flash("-")
    opptype = "subtract"
    usenmst1=false
    emptyLine()
  end
end
function multi()
  if oppcanhap==true then
    button.flash("*")
    opptype="multiply"
    usenmst1=false
    emptyLine()
  end
end
function div()
  if oppcanhap==true then
    button.flash("/")
    opptype="divide"
    usenmst1= false
    emptyLine()
  end
end
numPad()
m.setCursorPos(5,5)

while true do
 getClick()
end