Scala implementation for bubble sort, insertion sort and selection sort.

wustzjf · Oct 23, 2018 · 66c64c5 · 66c64c5
1 parent b06c996
commit 66c64c5
Showing 1 changed file with 45 additions and 4 deletions.
diff --git a/scala/11_sorts/Sorts.scala b/scala/11_sorts/Sorts.scala
@@ -1,13 +1,21 @@
 import scala.util.control.Breaks._
+
+/**
+  * 冒泡排序、插入排序、选择排序
+  *
+  * Author: yangchuz
+  */
 object Sorts {
   def main(args: Array[String]): Unit ={
-    println(bubbleSort(Array(0, 3, 7, 6, 4, 5, 1, 2)).mkString(", "))
+//    println(bubbleSort(Array(0, 6, 2, 3, 8, 5, 6, 7), 8).mkString(", "))
+//    println(insertSort(Array(0, 6, 2, 3, 8, 5, 6, 7), 8).mkString(", "))
+    println(selectionSort(Array(0, 6, 2, 3, 8, 5, 6, 7), 8).mkString(", "))
   }
 
-  def bubbleSort(arr: Array[Int]): Array[Int] = {
-    val l = arr.length
+  def bubbleSort(arr: Array[Int], n:Int): Array[Int] = {
+    val n = arr.length
     breakable {
-      for(i <- (l-1) to (1, -1)){
+      for(i <- (n-1) to (1, -1)){
         var flag = false
         for(j <- 0 until i){
           if(arr(j) > arr(j+1)){
@@ -24,4 +32,37 @@ object Sorts {
     }
     arr
   }
+
+  def insertSort(arr: Array[Int], n:Int): Array[Int] = {
+    for(i <- 1 until n){
+      val tmp = arr(i)
+      breakable{
+        for(j <- (i-1) to (0, -1)){
+          if(tmp < arr(j)){
+            arr(j+1) = arr(j)
+          }else{
+            arr(j+1) = tmp
+            break
+          }
+        }
+      }
+    }
+    arr
+  }
+
+  def selectionSort(arr: Array[Int], n:Int): Array[Int] = {
+    for(i <- 0 until n){
+      var min = i
+      for(j <- (i + 1) until n){
+        if(arr(j) < arr(min)){
+          min = j
+        }
+      }
+
+      val tmp = arr(i)
+      arr(i) = arr(min)
+      arr(min) = tmp
+    }
+    arr
+  }
 }