' Lisa Perez
' June 21, 2012
' Calculator Program

TextWindow.WriteLine("~~~ Calculator Program ~~~")

TextWindow.Write("Please enter the first value: ")
number1 = TextWindow.ReadNumber()

TextWindow.Write("Please enter a + for addition, - for subtration,")
TextWindow.WriteLine("* for multiplication, and / for division: ")

operator = TextWindow.Read()

While ((operator <> "+") And (operator <> "-") And (operator <> "*") And (operator <> "/"))
  TextWindow.WriteLine("Please enter +, -, * or /")
  operator = TextWindow.Read()
EndWhile

TextWindow.Write("Please enter the second value: ")
number2 = TextWindow.ReadNumber()

If (operator = "+") Then
  result = number1 + number2
ElseIf (operator = "-") then
  result = number1 - number2
Elseif (operator = "*") then
  result = number1 * number2
Else 
  result = number1 / number2
EndIf

TextWindow.WriteLine("The result of " + number1 + " " + operator + " " + number2 + " is " + result)