File: t5274_1.scala

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scala 2.11.12-5
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import scala.reflect.runtime.universe._
import scala.tools.reflect.Eval

object Test extends App {
  reify {
    def factorial(n: BigInt): BigInt =
      if (n == 0) 1 else n * factorial(n-1)

    val f50 = factorial(50); val f49 = factorial(49)
    println("50! = " + f50)
    println("49! = " + f49)
    println("50!/49! = " + (f50 / f49))
  }.eval
}