strategy pattern

DesignPattern/DesignPattern.sln

@@ -1,7 +1,7 @@
 
 Microsoft Visual Studio Solution File, Format Version 12.00
-# Visual Studio Version 16
-VisualStudioVersion = 16.0.32630.194
+# Visual Studio Version 17
+VisualStudioVersion = 17.3.32811.315
 MinimumVisualStudioVersion = 10.0.40219.1
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Singleton", "Singleton\Singleton.csproj", "{37FE4D0C-A213-4EA5-B3EF-DB2DB3971ACE}"
 EndProject
@@ -31,6 +31,8 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Visitor", "Visitor\Visitor.
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Observer", "Observer\Observer.csproj", "{22E70ACA-E876-48E9-AB00-94FD359D0D82}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Strategy", "Strategy\Strategy.csproj", "{D6B55743-F509-4B6C-820A-DB8BC5FA0CE5}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -93,6 +95,10 @@ Global
 		{22E70ACA-E876-48E9-AB00-94FD359D0D82}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{22E70ACA-E876-48E9-AB00-94FD359D0D82}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{22E70ACA-E876-48E9-AB00-94FD359D0D82}.Release|Any CPU.Build.0 = Release|Any CPU
+		{D6B55743-F509-4B6C-820A-DB8BC5FA0CE5}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{D6B55743-F509-4B6C-820A-DB8BC5FA0CE5}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{D6B55743-F509-4B6C-820A-DB8BC5FA0CE5}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{D6B55743-F509-4B6C-820A-DB8BC5FA0CE5}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE

DesignPattern/Strategy/App.config

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<configuration>
+    <startup> 
+        <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.8.1" />
+    </startup>
+</configuration>

DesignPattern/Strategy/BitcoinPayment.cs

@@ -0,0 +1,24 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Strategy
+{
+    internal class BitcoinPayment : IPayment
+    {
+        private string address;
+
+        public BitcoinPayment(string address)
+        {
+            this.address = address;
+        }
+
+        public void Pay(int amount)
+        {
+            decimal btc = (decimal)(amount / 10000000.0);
+            Console.WriteLine($"Charged {btc} to BTC: {address}");
+        }
+    }
+}

DesignPattern/Strategy/CardPayment.cs

@@ -0,0 +1,24 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Strategy
+{
+    internal class CardPayment : IPayment
+    {
+        private string cardNo, mmyy;
+
+        public CardPayment(string cardNo, string mmyy)
+        {
+            this.cardNo = cardNo;
+            this.mmyy = mmyy;
+        }
+
+        public void Pay(int amount)
+        {
+            Console.WriteLine($"Charged {amount} to CARD: {cardNo}");
+        }
+    }
+}

DesignPattern/Strategy/Checkout.cs

@@ -0,0 +1,24 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Strategy
+{
+    internal class Checkout
+    {
+        public IPayment Payment { get; set; }
+
+        public Checkout(IPayment payment)
+        {
+            Payment = payment;
+        }
+
+        public void Charge(int total)
+        {
+            Console.WriteLine($"Charging {total}");
+            this.Payment.Pay(total);
+        }
+    }
+}

DesignPattern/Strategy/Client.cs

@@ -0,0 +1,22 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Strategy
+{
+    internal class Client
+    {
+        public static void HowToTest()
+        {
+            CardPayment card = new CardPayment("1234-5678-9101-1121", "12/25");
+            Checkout checkout = new Checkout(card);
+            checkout.Charge(20000);
+
+            BitcoinPayment btc = new BitcoinPayment("1Bd3Fd2Tddf334FFcdffs3434FF");
+            checkout.Payment = btc;
+            checkout.Charge(30000);
+        }
+    }
+}

DesignPattern/Strategy/IPayment.cs

@@ -0,0 +1,13 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Strategy
+{
+    internal interface IPayment
+    {
+        void Pay(int amount);
+    }
+}

DesignPattern/Strategy/Program.cs

@@ -0,0 +1,23 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Strategy
+{
+    /*
+     * 카테고리: 행위 패턴
+     * 개요: 하나의 문제 해결을 위한 다양한 알고리즘이 존재할 때,
+     * 하나의 공통 인터페이스를 통해 클라이언트가 자신에게 알맞은 알고리즘을 사용하게 함
+     */
+    internal class Program
+    {
+        static void Main(string[] args)
+        {
+            Client.HowToTest();
+
+            Console.ReadKey();
+        }
+    }
+}

DesignPattern/Strategy/Properties/AssemblyInfo.cs

@@ -0,0 +1,36 @@
+using System.Reflection;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+
+// 어셈블리에 대한 일반 정보는 다음 특성 집합을 통해 
+// 제어됩니다. 어셈블리와 관련된 정보를 수정하려면
+// 이러한 특성 값을 변경하세요.
+[assembly: AssemblyTitle("Strategy")]
+[assembly: AssemblyDescription("")]
+[assembly: AssemblyConfiguration("")]
+[assembly: AssemblyCompany("")]
+[assembly: AssemblyProduct("Strategy")]
+[assembly: AssemblyCopyright("Copyright ©  2022")]
+[assembly: AssemblyTrademark("")]
+[assembly: AssemblyCulture("")]
+
+// ComVisible을 false로 설정하면 이 어셈블리의 형식이 COM 구성 요소에 
+// 표시되지 않습니다. COM에서 이 어셈블리의 형식에 액세스하려면
+// 해당 형식에 대해 ComVisible 특성을 true로 설정하세요.
+[assembly: ComVisible(false)]
+
+// 이 프로젝트가 COM에 노출되는 경우 다음 GUID는 typelib의 ID를 나타냅니다.
+[assembly: Guid("d6b55743-f509-4b6c-820a-db8bc5fa0ce5")]
+
+// 어셈블리의 버전 정보는 다음 네 가지 값으로 구성됩니다.
+//
+//      주 버전
+//      부 버전 
+//      빌드 번호
+//      수정 버전
+//
+// 모든 값을 지정하거나 아래와 같이 '*'를 사용하여 빌드 번호 및 수정 번호를
+// 기본값으로 할 수 있습니다.
+// [assembly: AssemblyVersion("1.0.*")]
+[assembly: AssemblyVersion("1.0.0.0")]
+[assembly: AssemblyFileVersion("1.0.0.0")]

DesignPattern/Strategy/Strategy.csproj

@@ -0,0 +1,58 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" />
+  <PropertyGroup>
+    <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
+    <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
+    <ProjectGuid>{D6B55743-F509-4B6C-820A-DB8BC5FA0CE5}</ProjectGuid>
+    <OutputType>Exe</OutputType>
+    <RootNamespace>Strategy</RootNamespace>
+    <AssemblyName>Strategy</AssemblyName>
+    <TargetFrameworkVersion>v4.8.1</TargetFrameworkVersion>
+    <FileAlignment>512</FileAlignment>
+    <AutoGenerateBindingRedirects>true</AutoGenerateBindingRedirects>
+    <Deterministic>true</Deterministic>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
+    <PlatformTarget>AnyCPU</PlatformTarget>
+    <DebugSymbols>true</DebugSymbols>
+    <DebugType>full</DebugType>
+    <Optimize>false</Optimize>
+    <OutputPath>bin\Debug\</OutputPath>
+    <DefineConstants>DEBUG;TRACE</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
+    <PlatformTarget>AnyCPU</PlatformTarget>
+    <DebugType>pdbonly</DebugType>
+    <Optimize>true</Optimize>
+    <OutputPath>bin\Release\</OutputPath>
+    <DefineConstants>TRACE</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+  </PropertyGroup>
+  <ItemGroup>
+    <Reference Include="System" />
+    <Reference Include="System.Core" />
+    <Reference Include="System.Xml.Linq" />
+    <Reference Include="System.Data.DataSetExtensions" />
+    <Reference Include="Microsoft.CSharp" />
+    <Reference Include="System.Data" />
+    <Reference Include="System.Net.Http" />
+    <Reference Include="System.Xml" />
+  </ItemGroup>
+  <ItemGroup>
+    <Compile Include="BitcoinPayment.cs" />
+    <Compile Include="CardPayment.cs" />
+    <Compile Include="Checkout.cs" />
+    <Compile Include="Client.cs" />
+    <Compile Include="IPayment.cs" />
+    <Compile Include="Program.cs" />
+    <Compile Include="Properties\AssemblyInfo.cs" />
+  </ItemGroup>
+  <ItemGroup>
+    <None Include="App.config" />
+  </ItemGroup>
+  <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
+</Project>