RosettaCodeData/Task/Add-a-variable-to-a-class-i.../Wren/add-a-variable-to-a-class-i...

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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)")
}