SophiaPretty

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Category > Computer Science Posted 11 Dec 2017 My Price 10.00

example of how to use @tailrec def factorial(n: BigInt): BigInt

Hi. This is another scala question. Thank you very much!

  • import scala.annotation._

    object Lab10 {

      //Here's an example of how to use @tailrec
      def factorial(n: BigInt): BigInt = {
        @tailrec
        def inner(n: BigInt, product: BigInt): BigInt =
          if (n <= 0) product
          else inner(n - 1, product * n)

        inner(n, 1)
      }

      def paranMatch(chars: Array[Char]): Boolean = {
        ???
      }

      def fib(n: Int): Int = {
        ???
      }

      def isPalindrome(chars: Array[Char]): Boolean = {
        ???
      }

      def power(x: BigInt, n: BigInt): BigInt = {
        ???
      }

      def hanoi(n: BigInt): BigInt = {
        ???
      }


      def main(args: Array[String]) = {
        assert(paranMatch("(a + b) - ((c * d) + e)"))
        assert(fib(10) == 55)
        assert(isPalindrome("racecar"))
        assert(power(2, 10) == 1024)
        assert(hanoi(100) == 1267650600228229401496703205375)
      }

    }



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SophiaPretty
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Status NEW Posted 11 Dec 2017 01:12 PM My Price 10.00

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