From 426376caf815bcfce23b648a199d6ead2c440fb6 Mon Sep 17 00:00:00 2001
From: ymtk-test <ymtktest10@gmail.com>
Date: Sun, 11 Apr 2021 15:07:14 +0900
Subject: [PATCH] =?UTF-8?q?=E7=B7=B4=E7=BF=92?=
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---
 .bsp/sbt.json            | 1 +
 Factorial.scala          | 9 ++++-----
 project/build.properties | 1 +
 3 files changed, 6 insertions(+), 5 deletions(-)
 create mode 100644 .bsp/sbt.json
 create mode 100644 project/build.properties

diff --git a/.bsp/sbt.json b/.bsp/sbt.json
new file mode 100644
index 0000000..823d8e1
--- /dev/null
+++ b/.bsp/sbt.json
@@ -0,0 +1 @@
+{"name":"sbt","version":"1.5.0","bspVersion":"2.0.0-M5","languages":["scala"],"argv":["C:\\Program Files\\Java\\jdk-11.0.2/bin/java","-Xms100m","-Xmx100m","-classpath","C:\\Program Files (x86)\\sbt\\\\bin\\sbt-launch.jar","xsbt.boot.Boot","-bsp","--sbt-launch-jar=C:\\Program%20Files%20(x86)\\sbt\\\\bin\\sbt-launch.jar"]}
\ No newline at end of file
diff --git a/Factorial.scala b/Factorial.scala
index 65e5bc2..e94a2c8 100644
--- a/Factorial.scala
+++ b/Factorial.scala
@@ -1,7 +1,6 @@
 import scala.math.BigInt
 
-object Factorial extends App {
-  def factorial(i: BigInt): BigInt = if (i == 0) 1 else i * factorial(i - 1)
-
-  println(factorial(10000))
-}
+object FactorialTailRec extends App {
+  def factorial(i: BigInt, acc: BigInt): BigInt = if (i == 0) acc else factorial(i - 1, i * acc) 
+  println(factorial(10000, 1))
+}
\ No newline at end of file
diff --git a/project/build.properties b/project/build.properties
new file mode 100644
index 0000000..e67343a
--- /dev/null
+++ b/project/build.properties
@@ -0,0 +1 @@
+sbt.version=1.5.0