施工阶段4:选择排序
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@ -3,3 +3,4 @@ obj/
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/packages/
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riderModule.iml
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/_ReSharper.Caches/
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.fake
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@ -1,17 +1,15 @@
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<Project Sdk="Microsoft.NET.Sdk">
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<PropertyGroup>
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<OutputType>Exe</OutputType>
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<TargetFramework>net6.0</TargetFramework>
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<RootNamespace>Algorithm_FSharp</RootNamespace>
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</PropertyGroup>
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<ItemGroup>
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<Compile Include="TestList.fs" />
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<Compile Include="SelectionSort.fs" />
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<Compile Include="MergeSort.fs" />
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<Compile Include="QuickSort.fs" />
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<Compile Include="Program.fs" />
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</ItemGroup>
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<Project Sdk="Microsoft.NET.Sdk">
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<PropertyGroup>
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<OutputType>Exe</OutputType>
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<TargetFramework>net6.0</TargetFramework>
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<RootNamespace>Algorithm_FSharp</RootNamespace>
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</PropertyGroup>
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<ItemGroup>
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<Compile Include="IntersectionSort.fs" />
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<Compile Include="TestList.fs" />
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<Compile Include="SelectionSort.fs" />
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<Compile Include="MergeSort.fs" />
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<Compile Include="QuickSort.fs" />
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<Compile Include="Program.fs" />
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</ItemGroup>
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</Project>
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@ -0,0 +1,23 @@
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module Algorithm_FSharp.IntersectionSort
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// 将一个元素插入到有序序列中
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// intersect : 'a -> 'a list -> 'a list
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let rec intersect elem = function
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| [] -> [elem] // 若序列为空,则无需比较,直接将元素插入到空序列中
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| x::xs -> // 若序列不为空
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match x < elem with // 取出序列中的第一个元素x,并将其与待插入元素比较
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| true -> // 若x小于待插入元素
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match xs with // 判断xs是否为空
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| [] -> [elem; x] // 若xs为空,则直接插入到elem后部即可
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| y::ys -> // 若xs不为空,则切割xs为有序序列的第二个元素y和剩余元素ys
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match elem < y with // 再比较elem和y
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| true -> [x; elem; y] @ ys // 若x < elem < y,则插入位点位于x、y之间
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| false -> x::(xs |> intersect elem) // 若elem > y,则插入位点无法决议,递归插入
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| false -> elem::x::xs // 若待插入元素小于序列中第一个元素,则直接插入到序列头部即可
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// 插入排序的F#实现
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// intersection_sort : 'a list -> 'a list
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let rec intersection_sort = function
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| [] -> [] // 若待排序序列为空或只有一个元素,则它已经有序,直接返回
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| [single] -> [single]
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| x::xs -> xs // 若待排序序列有多个元素,则取出第一个元素
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|> intersection_sort // 递归对后续序列进行排序
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|> intersect x // 然后将第一个元素插入到序列中
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@ -1,8 +1,8 @@
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// For more information see https://aka.ms/fsharp-console-apps
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module Algorithm_FSharp.Program
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open Algorithm_FSharp.QuickSort
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open Algorithm_FSharp.IntersectionSort
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open Algorithm_FSharp.TestList
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// 测试用例
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printfn $"%A{myList
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|> quicksort}"
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|> intersection_sort}"
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@ -37,6 +37,9 @@ let myList = [
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512
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652
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111
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233
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233
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233
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851
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98
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277
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