import "io" for Stdin, Stdout

class Birds {
    construct new(userFields) {
        _userFields = userFields
    }
    userFields { _userFields }
}

var userFields = {}
System.print("Enter three fields to add to the Birds class:")
for (i in 0..2) {
    System.write("\n  name : ")
    Stdout.flush()
    var name = Stdin.readLine()
    System.write("  value: ")
    Stdout.flush()
    var value = Num.fromString(Stdin.readLine())
    userFields[name] = value
}

var birds = Birds.new(userFields)

System.print("\nYour fields are:\n")
for (kv in birds.userFields) {
    System.print("  %(kv.key) = %(kv.value)")
}