//
// simplified grade calculations program
// prompt for some grades
// print numeric grade and letter grade
//
val Exam1Max = 100
val Exam2Max = 200
val HomeworkMax = 400

def getScore(assignment : String, maxPoints : Int) : Int = {
  println("enter your score on " + assignment + " (max " + maxPoints + ")")
  readInt
}

val exam1 = getScore("exam1", Exam1Max)

val exam2 = getScore("exam2", Exam2Max)

val homework = getScore("homework", HomeworkMax)

val numericGrade = 100 * (exam1 + exam2 + homework).toDouble / 
    (Exam1Max + Exam2Max + HomeworkMax)

println("numeric grade is " + numericGrade)

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

println("letter grade is " + letterGrade)