//
// program to compute numeric average and letter grade (prototype for now)
// prompt for total points in different categories (homework, etc.)
// print numeric average and letter grade

def promptForPoints(what : String, maxPoint : Double) : Double = {
  println("enter your " + what + " points (maximum " + maxPoint + ")")
  readDouble
}

val maxAttendance = 50
val maxHomework = 200
val maxExam = 300

val myAttendance = promptForPoints("attendance", maxAttendance)
val myHomework = promptForPoints("homework", maxHomework)
val myExam = promptForPoints("exam", maxExam)

val numericAverage = 100*(myAttendance + myHomework + myExam) / (maxAttendance + maxHomework + maxExam)
println("numeric average = " + numericAverage +"%")

val letterGrade = 
  if (numericAverage >= 90) 'A'
  else if (numericAverage >= 80) 'B'
  else if (numericAverage >= 70) 'C'
  else if (numericAverage >= 60) 'D'
  else 'F'

println("letter grade is " + letterGrade)