//
// sketch of all-purpose conversion program
// prompts for what type of conversion, then number to convert
//

val CmPerInch = 2.54

def inchesToCm(inches : Double) : Double = inches * CmPerInch

def cmToInches(cm : Double) : Double = cm / CmPerInch

println("enter 'i' for inches to cm, 'c' for cm to inches")

val which = readChar

println("enter number to convert")

val numToConvert = readDouble

if (which == 'i') {
  println(inchesToCm(numToConvert) + " cm")
}
else if (which == 'c') {
  println(cmToInches(numToConvert) + " inches")
}
else {
  println("mistake!")
}