exercise finished

.gitignore

@@ -0,0 +1,6 @@
+bin/
+obj/
+/packages/
+riderModule.iml
+/_ReSharper.Caches/
+.idea

TicketSystem.sln

@@ -0,0 +1,16 @@
+
+Microsoft Visual Studio Solution File, Format Version 12.00
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "TicketSystem", "TicketSystem\TicketSystem.csproj", "{1C26484E-220B-4927-8981-A70201E0232E}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{1C26484E-220B-4927-8981-A70201E0232E}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{1C26484E-220B-4927-8981-A70201E0232E}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{1C26484E-220B-4927-8981-A70201E0232E}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{1C26484E-220B-4927-8981-A70201E0232E}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+EndGlobal

TicketSystem/Order.cs

@@ -0,0 +1,57 @@
+using System.Collections.Generic;
+using System.Diagnostics;
+using TicketSystem.Tickets;
+
+namespace TicketSystem
+{
+    public class Order
+    {
+        private List<Ticket> tickets;
+        private int price;
+        public int Price => price;
+        
+        public Order()
+        {
+            tickets = new List<Ticket>();
+            price = 0;
+        }
+        
+        public void AddTicket(Ticket ticket)
+        {
+            tickets.Add(ticket);
+            price += ticket.price;
+        }
+
+        public void AddTicket(TicketType type)
+        {
+            Ticket t;
+            switch (type)
+            {
+                case TicketType.Child:
+                    t = new Child();
+                    tickets.Add(t);
+                    price += t.price;
+                    break;
+                case TicketType.Student:
+                    t = new Student();
+                    tickets.Add(t);
+                    price += t.price;
+                    break;
+                case TicketType.Adult:
+                    t = new Adult();
+                    tickets.Add(t);
+                    price += t.price;
+                    break;
+            }
+        }
+
+        public void ApplyReduction()
+        {
+            price = 0;
+            foreach (var ticket in tickets)
+            {
+                price += ticket.PriceWithReduction();
+            }
+        }
+    }
+}

TicketSystem/Program.cs

@@ -0,0 +1,16 @@
+using TicketSystem.Tickets;
+
+namespace TicketSystem
+{
+    internal class Program
+    {
+        public static void Main(string[] args)
+        {
+            Order order = new Order();
+            order.AddTicket(TicketType.Child);
+            order.AddTicket(TicketType.Student);
+            order.AddTicket(TicketType.Adult);
+            order.ApplyReduction();
+        }
+    }
+}

TicketSystem/Properties/AssemblyInfo.cs

@@ -0,0 +1,35 @@
+using System.Reflection;
+using System.Runtime.InteropServices;
+
+// General Information about an assembly is controlled through the following 
+// set of attributes. Change these attribute values to modify the information
+// associated with an assembly.
+[assembly: AssemblyTitle("TicketSystem")]
+[assembly: AssemblyDescription("")]
+[assembly: AssemblyConfiguration("")]
+[assembly: AssemblyCompany("")]
+[assembly: AssemblyProduct("TicketSystem")]
+[assembly: AssemblyCopyright("Copyright ©  2023")]
+[assembly: AssemblyTrademark("")]
+[assembly: AssemblyCulture("")]
+
+// Setting ComVisible to false makes the types in this assembly not visible 
+// to COM components.  If you need to access a type in this assembly from 
+// COM, set the ComVisible attribute to true on that type.
+[assembly: ComVisible(false)]
+
+// The following GUID is for the ID of the typelib if this project is exposed to COM
+[assembly: Guid("1C26484E-220B-4927-8981-A70201E0232E")]
+
+// Version information for an assembly consists of the following four values:
+//
+//      Major Version
+//      Minor Version 
+//      Build Number
+//      Revision
+//
+// You can specify all the values or you can default the Build and Revision Numbers 
+// by using the '*' as shown below:
+// [assembly: AssemblyVersion("1.0.*")]
+[assembly: AssemblyVersion("1.0.0.0")]
+[assembly: AssemblyFileVersion("1.0.0.0")]

TicketSystem/TicketSystem.csproj

@@ -0,0 +1,59 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="4.0" DefaultTargets="Build" 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>{1C26484E-220B-4927-8981-A70201E0232E}</ProjectGuid>
+        <OutputType>Exe</OutputType>
+        <AppDesignerFolder>Properties</AppDesignerFolder>
+        <RootNamespace>TicketSystem</RootNamespace>
+        <AssemblyName>TicketSystem</AssemblyName>
+        <TargetFrameworkVersion>v4.7.2</TargetFrameworkVersion>
+        <FileAlignment>512</FileAlignment>
+        <AutoGenerateBindingRedirects>true</AutoGenerateBindingRedirects>
+    </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.Data" />
+        <Reference Include="System.Xml" />
+    </ItemGroup>
+    <ItemGroup>
+        <Compile Include="Order.cs" />
+        <Compile Include="Program.cs" />
+        <Compile Include="Properties\AssemblyInfo.cs" />
+        <Compile Include="Tickets\Adult.cs" />
+        <Compile Include="Tickets\Child.cs" />
+        <Compile Include="Tickets\Student.cs" />
+        <Compile Include="Tickets\Ticket.cs" />
+    </ItemGroup>
+    <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
+    <!-- To modify your build process, add your task inside one of the targets below and uncomment it. 
+         Other similar extension points exist, see Microsoft.Common.targets.
+    <Target Name="BeforeBuild">
+    </Target>
+    <Target Name="AfterBuild">
+    </Target>
+    -->
+
+</Project>

TicketSystem/Tickets/Adult.cs

@@ -0,0 +1,17 @@
+namespace TicketSystem.Tickets
+{
+    public class Adult: Ticket
+    {
+        public int price { get; }
+
+        public Adult()
+        {
+            price = 20;
+        }
+
+        public int PriceWithReduction()
+        {
+            return price - price/100*20;
+        }
+    }
+}

TicketSystem/Tickets/Child.cs

@@ -0,0 +1,17 @@
+namespace TicketSystem.Tickets
+{
+    public class Child: Ticket
+    {
+        public int price { get; }
+
+        public Child()
+        {
+            price = 5;
+        }
+        
+        public int PriceWithReduction()
+        {
+            return 2;
+        }
+    }
+}

TicketSystem/Tickets/Student.cs

@@ -0,0 +1,17 @@
+namespace TicketSystem.Tickets
+{
+    public class Student: Ticket
+    {
+        public int price { get; }
+        
+        public Student()
+        {
+            price = 10;
+        }
+
+        public int PriceWithReduction()
+        {
+            return 10-3;
+        }
+    }
+}

TicketSystem/Tickets/Ticket.cs

@@ -0,0 +1,15 @@
+namespace TicketSystem.Tickets
+{
+    public enum TicketType 
+    {
+        Child,
+        Student,
+        Adult
+    }
+
+    public interface Ticket
+    {
+        int price { get; }
+        int PriceWithReduction();
+    }
+}