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Merge pull request #440 from ikesnowy/dev
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‎2 Sorting/2.3/Quick/QuickSort.cs‎

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Original file line numberDiff line numberDiff line change
@@ -69,6 +69,32 @@ private int Partition<T>(T[] a, int lo, int hi) where T : IComparable<T>
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return j;
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}
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/// <summary>
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/// 令 a[k] 变成第 k 小的元素。
74+
/// </summary>
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/// <typeparam name="T">元素类型。</typeparam>
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/// <param name="a">需要排序的数组。</param>
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/// <param name="k">序号</param>
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/// <returns></returns>
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public T Select<T>(T[] a, int k) where T : IComparable<T>
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{
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if (k < 0 || k > a.Length)
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throw new IndexOutOfRangeException("Select elements out of bounds");
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Shuffle(a);
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int lo = 0, hi = a.Length - 1;
85+
while (hi > lo)
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{
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int i = Partition(a, lo, hi);
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if (i > k)
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hi = i - 1;
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else if (i < k)
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lo = i + 1;
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else
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return a[i];
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}
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return a[lo];
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}
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/// <summary>
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/// 打乱数组。
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/// </summary>

‎2 Sorting/2.4/PriorityQueue/MinPQ.cs‎

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@@ -120,21 +120,21 @@ public void Insert(Key v)
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public int Size() => this.n;
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/// <summary>
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/// 获取堆的迭代器，元素以降序排列。
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/// 获取堆的迭代器，元素以升序排列。
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/// </summary>
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/// <returns></returns>
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public IEnumerator<Key> GetEnumerator()
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{
128-
MaxPQ<Key> copy = new MaxPQ<Key>(this.n);
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MinPQ<Key> copy = new MinPQ<Key>(this.n);
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for (int i = 1; i <= this.n; i++)
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copy.Insert(this.pq[i]);
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while (!copy.IsEmpty())
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yield return copy.DelMax(); // 下次迭代的时候从这里继续执行。
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yield return copy.DelMin(); // 下次迭代的时候从这里继续执行。
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}
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/// <summary>
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/// 获取堆的迭代器，元素以降序排列。
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/// 获取堆的迭代器，元素以升序排列。
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/// </summary>
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/// <returns></returns>
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IEnumerator IEnumerable.GetEnumerator()

‎2 Sorting/2.4/PriorityQueue/MinPQX.cs‎

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Original file line numberDiff line numberDiff line change
@@ -119,21 +119,21 @@ public void Insert(Key v)
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public int Size() => this.n;
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/// <summary>
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/// 获取堆的迭代器，元素以降序排列。
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/// 获取堆的迭代器，元素以升序排列。
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/// </summary>
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/// <returns></returns>
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public IEnumerator<Key> GetEnumerator()
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{
127-
MaxPQ<Key> copy = new MaxPQ<Key>(this.n);
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MinPQ<Key> copy = new MinPQ<Key>(this.n);
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for (int i = 1; i <= this.n; i++)
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copy.Insert(this.pq[i]);
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while (!copy.IsEmpty())
132-
yield return copy.DelMax(); // 下次迭代的时候从这里继续执行。
132+
yield return copy.DelMin(); // 下次迭代的时候从这里继续执行。
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}
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/// <summary>
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/// 获取堆的迭代器，元素以降序排列。
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/// 获取堆的迭代器，元素以升序排列。
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/// </summary>
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/// <returns></returns>
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IEnumerator IEnumerable.GetEnumerator()

‎2 Sorting/2.5/2.5.1/2.5.1.csproj‎

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<?xml version="1.0" encoding="utf-8"?>
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<Project ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
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<Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" />
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<PropertyGroup>
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<Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
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<Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
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<ProjectGuid>{CC3F5E6E-EE3B-41DA-8098-50D38CD55A7F}</ProjectGuid>
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<OutputType>Exe</OutputType>
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<RootNamespace>_2._5._1</RootNamespace>
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<AssemblyName>2.5.1</AssemblyName>
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<TargetFrameworkVersion>v4.7</TargetFrameworkVersion>
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<FileAlignment>512</FileAlignment>
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<AutoGenerateBindingRedirects>true</AutoGenerateBindingRedirects>
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<Deterministic>true</Deterministic>
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</PropertyGroup>
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<PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
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<PlatformTarget>AnyCPU</PlatformTarget>
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<DebugSymbols>true</DebugSymbols>
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<DebugType>full</DebugType>
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<Optimize>false</Optimize>
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<OutputPath>bin\Debug\</OutputPath>
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<DefineConstants>DEBUG;TRACE</DefineConstants>
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<ErrorReport>prompt</ErrorReport>
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<WarningLevel>4</WarningLevel>
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</PropertyGroup>
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<PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
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<PlatformTarget>AnyCPU</PlatformTarget>
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<DebugType>pdbonly</DebugType>
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<Optimize>true</Optimize>
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<OutputPath>bin\Release\</OutputPath>
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<DefineConstants>TRACE</DefineConstants>
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<ErrorReport>prompt</ErrorReport>
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<WarningLevel>4</WarningLevel>
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</PropertyGroup>
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<ItemGroup>
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<Reference Include="System" />
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<Reference Include="System.Core" />
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<Reference Include="System.Xml.Linq" />
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<Reference Include="System.Data.DataSetExtensions" />
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<Reference Include="Microsoft.CSharp" />
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<Reference Include="System.Data" />
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<Reference Include="System.Net.Http" />
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<Reference Include="System.Xml" />
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</ItemGroup>
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<ItemGroup>
46+
<Compile Include="Program.cs" />
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<Compile Include="Properties\AssemblyInfo.cs" />
48+
</ItemGroup>
49+
<ItemGroup>
50+
<None Include="App.config" />
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</ItemGroup>
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<Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
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</Project>

‎2 Sorting/2.5/2.5.1/App.config‎

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<?xml version="1.0" encoding="utf-8" ?>
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<configuration>
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<startup>
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<supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.7" />
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</startup>
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</configuration>

‎2 Sorting/2.5/2.5.1/Program.cs‎

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using System;
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3+
namespace _2._5._1
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{
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/*
6+
* 2.5.1
7+
*
8+
* 在下面这段 String 类型的 compareTo() 方法的实现中，
9+
* 第三行对提高运行效率有何帮助？
10+
*
11+
*/
12+
class Program
13+
{
14+
static void Main(string[] args)
15+
{
16+
// if (this == that) return 0;
17+
// 如果比较的两个 string 是同一个对象的引用，直接返回相等结果
18+
// 而不必再逐字符比较。
19+
string s = "123456";
20+
string p = s;
21+
Console.WriteLine(s.CompareTo(p)); // 输出 0
22+
}
23+
}
24+
}

‎2 Sorting/2.5/2.5.1/Properties/AssemblyInfo.cs‎

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using System.Reflection;
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using System.Runtime.InteropServices;
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// 有关程序集的一般信息由以下
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// 控制。更改这些特性值可修改
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// 与程序集关联的信息。
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[assembly: AssemblyTitle("2.5.1")]
8+
[assembly: AssemblyDescription("")]
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[assembly: AssemblyConfiguration("")]
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[assembly: AssemblyCompany("")]
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[assembly: AssemblyProduct("2.5.1")]
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[assembly: AssemblyCopyright("Copyright © 2019")]
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[assembly: AssemblyTrademark("")]
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[assembly: AssemblyCulture("")]
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// 将 ComVisible 设置为 false 会使此程序集中的类型
17+
//对 COM 组件不可见。如果需要从 COM 访问此程序集中的类型
18+
//请将此类型的 ComVisible 特性设置为 true。
19+
[assembly: ComVisible(false)]
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21+
// 如果此项目向 COM 公开，则下列 GUID 用于类型库的 ID
22+
[assembly: Guid("cc3f5e6e-ee3b-41da-8098-50d38cd55a7f")]
23+
24+
// 程序集的版本信息由下列四个值组成:
25+
//
26+
// 主版本
27+
// 次版本
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// 生成号
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// 修订号
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//
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// 可以指定所有值，也可以使用以下所示的 "*" 预置版本号和修订号
32+
// 方法是按如下所示使用“*”: :
33+
// [assembly: AssemblyVersion("1.0.*")]
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[assembly: AssemblyVersion("1.0.0.0")]
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[assembly: AssemblyFileVersion("1.0.0.0")]

‎2 Sorting/2.5/2.5.10/2.5.10.csproj‎

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<?xml version="1.0" encoding="utf-8"?>
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<Project ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
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<Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" />
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<PropertyGroup>
5+
<Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
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<Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
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<ProjectGuid>{AE4E57EE-9891-4DDB-96B1-B875371BC222}</ProjectGuid>
8+
<OutputType>Exe</OutputType>
9+
<RootNamespace>_2._5._10</RootNamespace>
10+
<AssemblyName>2.5.10</AssemblyName>
11+
<TargetFrameworkVersion>v4.7</TargetFrameworkVersion>
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<FileAlignment>512</FileAlignment>
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<AutoGenerateBindingRedirects>true</AutoGenerateBindingRedirects>
14+
<Deterministic>true</Deterministic>
15+
</PropertyGroup>
16+
<PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
17+
<PlatformTarget>AnyCPU</PlatformTarget>
18+
<DebugSymbols>true</DebugSymbols>
19+
<DebugType>full</DebugType>
20+
<Optimize>false</Optimize>
21+
<OutputPath>bin\Debug\</OutputPath>
22+
<DefineConstants>DEBUG;TRACE</DefineConstants>
23+
<ErrorReport>prompt</ErrorReport>
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<WarningLevel>4</WarningLevel>
25+
</PropertyGroup>
26+
<PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
27+
<PlatformTarget>AnyCPU</PlatformTarget>
28+
<DebugType>pdbonly</DebugType>
29+
<Optimize>true</Optimize>
30+
<OutputPath>bin\Release\</OutputPath>
31+
<DefineConstants>TRACE</DefineConstants>
32+
<ErrorReport>prompt</ErrorReport>
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<WarningLevel>4</WarningLevel>
34+
</PropertyGroup>
35+
<ItemGroup>
36+
<Reference Include="System" />
37+
<Reference Include="System.Core" />
38+
<Reference Include="System.Xml.Linq" />
39+
<Reference Include="System.Data.DataSetExtensions" />
40+
<Reference Include="Microsoft.CSharp" />
41+
<Reference Include="System.Data" />
42+
<Reference Include="System.Net.Http" />
43+
<Reference Include="System.Xml" />
44+
</ItemGroup>
45+
<ItemGroup>
46+
<Compile Include="Program.cs" />
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<Compile Include="Properties\AssemblyInfo.cs" />
48+
<Compile Include="Version.cs" />
49+
</ItemGroup>
50+
<ItemGroup>
51+
<None Include="App.config" />
52+
</ItemGroup>
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<Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
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</Project>

‎2 Sorting/2.5/2.5.10/App.config‎

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<?xml version="1.0" encoding="utf-8" ?>
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<configuration>
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<startup>
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<supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.7" />
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</startup>
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</configuration>

‎2 Sorting/2.5/2.5.10/Program.cs‎

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using System;
2+
3+
namespace _2._5._10
4+
{
5+
/*
6+
* 2.5.10
7+
*
8+
* 创建一个数据类型 Version 来表示软件的版本，
9+
* 例如 155.1.1、155.10.1、155.10.2。
10+
* 为它实现 Comparable 接口，
11+
* 其中 115.1.1 的版本低于 115.10.1。
12+
*
13+
*/
14+
class Program
15+
{
16+
static void Main(string[] args)
17+
{
18+
Version[] versions = new Version[3];
19+
versions[0] = new Version("155.10.1");
20+
versions[1] = new Version("155.1.1");
21+
versions[2] = new Version("155.10.2");
22+
Array.Sort(versions);
23+
for (int i = 0; i < versions.Length; i++)
24+
{
25+
Console.WriteLine(versions[i]);
26+
}
27+
}
28+
}
29+
}

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