commit 424f130999646d9a3d067b05e2f1f386c614278f
author Vern Zheng <kevonzheng@gmail.com> Wed Aug 12 16:29:59 2015 +0800
committer Vern Zheng <kevonzheng@gmail.com> Wed Aug 12 16:29:59 2015 +0800
tree 9b5be7d3756531b751450581f1bf9fdfc20f7b37
parent 9cb6b3fe2615b4ca299a5ef3fbad997a990583c8

Update exercise02.scala

src/Chapter17/exercise02.scala

diff --git a/src/Chapter17/exercise02.scala b/src/Chapter17/exercise02.scala
index 2376f56..35435a7 100644
--- a/src/Chapter17/exercise02.scala
+++ b/src/Chapter17/exercise02.scala
@@ -1,6 +1,11 @@
 /**
  * 定义一个可变类Pair[T]，带一个swap方法，交换对偶中组件的位置。
  */
-class Pair[T](val s:T,val t:T){
-  def swap() = new Pair(t,s)
+class Pair[T] (var s: T, var t: T) {
+  def swap() = {
+    val temp = s
+    this.s = t
+    this.t = temp
+  }
+  override def toString = s"s: $s, t: $t"
 }