diff --git a/Lesson4Task1/Lesson4Task1.sln b/Lesson4Task1/Lesson4Task1.sln
new file mode 100644
index 0000000..b9ffa3e
--- /dev/null
+++ b/Lesson4Task1/Lesson4Task1.sln
@@ -0,0 +1,40 @@
+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio 14
+VisualStudioVersion = 14.0.25420.1
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Lesson4Task1", "Lesson4Task1\Lesson4Task1.csproj", "{90A706D9-A902-4A1A-902D-A6465E512452}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Lesson4Task2", "Lesson4Task2\Lesson4Task2.csproj", "{59E6A54D-6F6E-4D7E-97F9-C40C27960E53}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Lesson4Task3", "Lesson4Task3\Lesson4Task3.csproj", "{17F02508-4588-4573-A18F-231847270931}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Lesson4Task4", "Lesson4Task4\Lesson4Task4.csproj", "{0AB9ED87-1196-41FE-A505-69C49C4D5AEF}"
+EndProject
+Global
+ GlobalSection(SolutionConfigurationPlatforms) = preSolution
+ Debug|Any CPU = Debug|Any CPU
+ Release|Any CPU = Release|Any CPU
+ EndGlobalSection
+ GlobalSection(ProjectConfigurationPlatforms) = postSolution
+ {90A706D9-A902-4A1A-902D-A6465E512452}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+ {90A706D9-A902-4A1A-902D-A6465E512452}.Debug|Any CPU.Build.0 = Debug|Any CPU
+ {90A706D9-A902-4A1A-902D-A6465E512452}.Release|Any CPU.ActiveCfg = Release|Any CPU
+ {90A706D9-A902-4A1A-902D-A6465E512452}.Release|Any CPU.Build.0 = Release|Any CPU
+ {59E6A54D-6F6E-4D7E-97F9-C40C27960E53}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+ {59E6A54D-6F6E-4D7E-97F9-C40C27960E53}.Debug|Any CPU.Build.0 = Debug|Any CPU
+ {59E6A54D-6F6E-4D7E-97F9-C40C27960E53}.Release|Any CPU.ActiveCfg = Release|Any CPU
+ {59E6A54D-6F6E-4D7E-97F9-C40C27960E53}.Release|Any CPU.Build.0 = Release|Any CPU
+ {17F02508-4588-4573-A18F-231847270931}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+ {17F02508-4588-4573-A18F-231847270931}.Debug|Any CPU.Build.0 = Debug|Any CPU
+ {17F02508-4588-4573-A18F-231847270931}.Release|Any CPU.ActiveCfg = Release|Any CPU
+ {17F02508-4588-4573-A18F-231847270931}.Release|Any CPU.Build.0 = Release|Any CPU
+ {0AB9ED87-1196-41FE-A505-69C49C4D5AEF}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+ {0AB9ED87-1196-41FE-A505-69C49C4D5AEF}.Debug|Any CPU.Build.0 = Debug|Any CPU
+ {0AB9ED87-1196-41FE-A505-69C49C4D5AEF}.Release|Any CPU.ActiveCfg = Release|Any CPU
+ {0AB9ED87-1196-41FE-A505-69C49C4D5AEF}.Release|Any CPU.Build.0 = Release|Any CPU
+ EndGlobalSection
+ GlobalSection(SolutionProperties) = preSolution
+ HideSolutionNode = FALSE
+ EndGlobalSection
+EndGlobal
diff --git a/Lesson4Task1/Lesson4Task1/App.config b/Lesson4Task1/Lesson4Task1/App.config
new file mode 100644
index 0000000..4bfa005
--- /dev/null
+++ b/Lesson4Task1/Lesson4Task1/App.config
@@ -0,0 +1,6 @@
+
+
+
+
+
+
diff --git a/Lesson4Task1/Lesson4Task1/Lesson4Task1.csproj b/Lesson4Task1/Lesson4Task1/Lesson4Task1.csproj
new file mode 100644
index 0000000..0e69f40
--- /dev/null
+++ b/Lesson4Task1/Lesson4Task1/Lesson4Task1.csproj
@@ -0,0 +1,61 @@
+
+
+
+
+ Debug
+ AnyCPU
+ {90A706D9-A902-4A1A-902D-A6465E512452}
+ Exe
+ Properties
+ Lesson4Task1
+ Lesson4Task1
+ v4.8
+ 512
+ true
+
+
+
+ AnyCPU
+ true
+ full
+ false
+ bin\Debug\
+ DEBUG;TRACE
+ prompt
+ 4
+
+
+ AnyCPU
+ pdbonly
+ true
+ bin\Release\
+ TRACE
+ prompt
+ 4
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
\ No newline at end of file
diff --git a/Lesson4Task1/Lesson4Task1/Program.cs b/Lesson4Task1/Lesson4Task1/Program.cs
new file mode 100644
index 0000000..56ed497
--- /dev/null
+++ b/Lesson4Task1/Lesson4Task1/Program.cs
@@ -0,0 +1,49 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+/*
+ * Написать метод GetFullName(string firstName, string lastName, string patronymic), принимающий на вход ФИО в разных аргументах и возвращающий объединённую строку с ФИО.
+ * Используя метод, написать программу, выводящую в консоль 3–4 разных ФИО.
+ * */
+namespace Lesson4Task1
+{
+ class Program
+ {
+ static string GetFullName(string firstName, string lastName, string patronymic)
+ {
+ string[] FIO = { firstName, lastName, patronymic };
+ string Result = string.Join(" ", FIO);
+ return Result;
+ }
+ static string GetWordFromUser(string What)
+ {
+ Console.WriteLine(What);
+ string Result = Console.ReadLine();
+ return Result;
+ }
+ static string GetFIO()
+ {
+ string Name = GetWordFromUser("Введите Имя: ");
+ string LastName = GetWordFromUser("Введите Фамилию: ");
+ string Patronymic = GetWordFromUser("Введите Отчество: ");
+ string FIO = GetFullName(Name, LastName, Patronymic);
+ return FIO;
+ }
+ static void Main(string[] args)
+ {
+ Console.WriteLine("Давайте познакомимся!");
+ string YouFIO = GetFIO();
+ Console.WriteLine($"Здравствуйте, уважаемый {YouFIO}!");
+ Console.WriteLine("Представте вашего друга.");
+ string Frend1 = GetFIO();
+ Console.WriteLine("Представте вашего второго друга.");
+ string Frend2 = GetFIO();
+ Console.WriteLine("Представте вашу подругу.");
+ string GirlFrend = GetFIO();
+ Console.WriteLine($"Приятно познакомиться, уважаемый {Frend1},\nуважаемый {Frend2},\nуважаемая {GirlFrend}.");
+ }
+ }
+}
diff --git a/Lesson4Task1/Lesson4Task1/Properties/AssemblyInfo.cs b/Lesson4Task1/Lesson4Task1/Properties/AssemblyInfo.cs
new file mode 100644
index 0000000..769921e
--- /dev/null
+++ b/Lesson4Task1/Lesson4Task1/Properties/AssemblyInfo.cs
@@ -0,0 +1,36 @@
+using System.Reflection;
+using System.Runtime.CompilerServices;
+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("Lesson4Task1")]
+[assembly: AssemblyDescription("")]
+[assembly: AssemblyConfiguration("")]
+[assembly: AssemblyCompany("")]
+[assembly: AssemblyProduct("Lesson4Task1")]
+[assembly: AssemblyCopyright("Copyright © 2021")]
+[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("90a706d9-a902-4a1a-902d-a6465e512452")]
+
+// 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")]
diff --git a/Lesson4Task1/Lesson4Task2/App.config b/Lesson4Task1/Lesson4Task2/App.config
new file mode 100644
index 0000000..4bfa005
--- /dev/null
+++ b/Lesson4Task1/Lesson4Task2/App.config
@@ -0,0 +1,6 @@
+
+
+
+
+
+
diff --git a/Lesson4Task1/Lesson4Task2/Lesson4Task2.csproj b/Lesson4Task1/Lesson4Task2/Lesson4Task2.csproj
new file mode 100644
index 0000000..d06dc4a
--- /dev/null
+++ b/Lesson4Task1/Lesson4Task2/Lesson4Task2.csproj
@@ -0,0 +1,61 @@
+
+
+
+
+ Debug
+ AnyCPU
+ {59E6A54D-6F6E-4D7E-97F9-C40C27960E53}
+ Exe
+ Properties
+ Lesson4Task2
+ Lesson4Task2
+ v4.8
+ 512
+ true
+
+
+
+ AnyCPU
+ true
+ full
+ false
+ bin\Debug\
+ DEBUG;TRACE
+ prompt
+ 4
+
+
+ AnyCPU
+ pdbonly
+ true
+ bin\Release\
+ TRACE
+ prompt
+ 4
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
\ No newline at end of file
diff --git a/Lesson4Task1/Lesson4Task2/Program.cs b/Lesson4Task1/Lesson4Task2/Program.cs
new file mode 100644
index 0000000..e48f987
--- /dev/null
+++ b/Lesson4Task1/Lesson4Task2/Program.cs
@@ -0,0 +1,28 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+/*
+ *
+Написать программу, принимающую на вход строку — набор чисел, разделенных пробелом, и возвращающую число — сумму всех чисел в строке.
+Ввести данные с клавиатуры и вывести результат на экран.
+ * */
+namespace Lesson4Task2
+{
+ class Program
+ {
+ static void Main(string[] args)
+ {
+ Console.WriteLine("Введите строку целых чисел через пробел.");
+ string inputStr = Console.ReadLine();
+ string[] Nums = inputStr.Split(' ');
+ int sum = 0;
+ foreach(var snum in Nums)
+ {
+ sum += Int32.Parse(snum);
+ }
+ Console.WriteLine($"Сумма всех чисел= {sum}");
+ }
+ }
+}
diff --git a/Lesson4Task1/Lesson4Task2/Properties/AssemblyInfo.cs b/Lesson4Task1/Lesson4Task2/Properties/AssemblyInfo.cs
new file mode 100644
index 0000000..6cd734f
--- /dev/null
+++ b/Lesson4Task1/Lesson4Task2/Properties/AssemblyInfo.cs
@@ -0,0 +1,36 @@
+using System.Reflection;
+using System.Runtime.CompilerServices;
+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("Lesson4Task2")]
+[assembly: AssemblyDescription("")]
+[assembly: AssemblyConfiguration("")]
+[assembly: AssemblyCompany("")]
+[assembly: AssemblyProduct("Lesson4Task2")]
+[assembly: AssemblyCopyright("Copyright © 2021")]
+[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("59e6a54d-6f6e-4d7e-97f9-c40c27960e53")]
+
+// 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")]
diff --git a/Lesson4Task1/Lesson4Task3/App.config b/Lesson4Task1/Lesson4Task3/App.config
new file mode 100644
index 0000000..4bfa005
--- /dev/null
+++ b/Lesson4Task1/Lesson4Task3/App.config
@@ -0,0 +1,6 @@
+
+
+
+
+
+
diff --git a/Lesson4Task1/Lesson4Task3/Lesson4Task3.csproj b/Lesson4Task1/Lesson4Task3/Lesson4Task3.csproj
new file mode 100644
index 0000000..1f70da0
--- /dev/null
+++ b/Lesson4Task1/Lesson4Task3/Lesson4Task3.csproj
@@ -0,0 +1,61 @@
+
+
+
+
+ Debug
+ AnyCPU
+ {17F02508-4588-4573-A18F-231847270931}
+ Exe
+ Properties
+ Lesson4Task3
+ Lesson4Task3
+ v4.8
+ 512
+ true
+
+
+
+ AnyCPU
+ true
+ full
+ false
+ bin\Debug\
+ DEBUG;TRACE
+ prompt
+ 4
+
+
+ AnyCPU
+ pdbonly
+ true
+ bin\Release\
+ TRACE
+ prompt
+ 4
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
\ No newline at end of file
diff --git a/Lesson4Task1/Lesson4Task3/Program.cs b/Lesson4Task1/Lesson4Task3/Program.cs
new file mode 100644
index 0000000..996a1ec
--- /dev/null
+++ b/Lesson4Task1/Lesson4Task3/Program.cs
@@ -0,0 +1,90 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+/*
+ *
+Написать метод по определению времени года. На вход подаётся число – порядковый номер месяца.
+На выходе — значение из перечисления (enum) — Winter, Spring, Summer, Autumn.
+Написать метод, принимающий на вход значение из этого перечисления и возвращающий название времени года (зима, весна, лето, осень).
+Используя эти методы, ввести с клавиатуры номер месяца и вывести название времени года.
+Если введено некорректное число, вывести в консоль текст «Ошибка: введите число от 1 до 12».
+
+ * */
+
+namespace Lesson4Task3
+{
+ class Program
+ {
+ public enum Seasons
+ {
+ Winter,
+ Spring,
+ Summer,
+ Autumn
+ }
+ /* static Seasons GetSeason(int month)
+ {
+ Seasons[] yea = { Seasons.Winter, Seasons.Winter, Seasons.Spring, Seasons.Spring, Seasons.Spring, Seasons.Summer, Seasons.Summer, Seasons.Summer,
+ Seasons.Autumn, Seasons.Autumn, Seasons.Autumn, Seasons.Winter };
+ }
+ */
+ static Seasons GetSeason(int month)
+ {
+ Seasons Result = 0;
+ switch(month)
+ {
+ case 12:
+ case 1:
+ case 2:
+ Result = Seasons.Winter;
+ break;
+
+ case 3:
+ case 4:
+ case 5:
+ Result = Seasons.Spring;
+ break;
+
+ case 6:
+ case 7:
+ case 8:
+ Result = Seasons.Summer;
+ break;
+
+ case 9:
+ case 10:
+ case 11:
+ Result = Seasons.Autumn;
+ break;
+ }
+ return Result;
+ }
+
+ static string GetSeasonRus(Seasons season)
+ {
+ string[] seasonsRus = { "Зима", "Весна", "Лето", "Осень", };
+ string Result = seasonsRus[(int)season];
+ return Result;
+ }
+
+ static void Main(string[] args)
+ {
+ Console.WriteLine("Введите номер месяца: ");
+ string numMonth = Console.ReadLine();
+ int month = Int32.Parse(numMonth);
+ while (month < 1 || month > 12)
+ {
+ Console.WriteLine("Ошибка: введите число от 1 до 12!");
+ numMonth = Console.ReadLine();
+ month = Int32.Parse(numMonth);
+ }
+ Seasons season = GetSeason(month);
+ string sName = GetSeasonRus(season);
+ Console.WriteLine($"Это {sName}");
+
+ }
+ }
+}
diff --git a/Lesson4Task1/Lesson4Task3/Properties/AssemblyInfo.cs b/Lesson4Task1/Lesson4Task3/Properties/AssemblyInfo.cs
new file mode 100644
index 0000000..d9d64a2
--- /dev/null
+++ b/Lesson4Task1/Lesson4Task3/Properties/AssemblyInfo.cs
@@ -0,0 +1,36 @@
+using System.Reflection;
+using System.Runtime.CompilerServices;
+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("Lesson4Task3")]
+[assembly: AssemblyDescription("")]
+[assembly: AssemblyConfiguration("")]
+[assembly: AssemblyCompany("")]
+[assembly: AssemblyProduct("Lesson4Task3")]
+[assembly: AssemblyCopyright("Copyright © 2021")]
+[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("17f02508-4588-4573-a18f-231847270931")]
+
+// 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")]
diff --git a/Lesson4Task1/Lesson4Task4/App.config b/Lesson4Task1/Lesson4Task4/App.config
new file mode 100644
index 0000000..4bfa005
--- /dev/null
+++ b/Lesson4Task1/Lesson4Task4/App.config
@@ -0,0 +1,6 @@
+
+
+
+
+
+
diff --git a/Lesson4Task1/Lesson4Task4/Lesson4Task4.csproj b/Lesson4Task1/Lesson4Task4/Lesson4Task4.csproj
new file mode 100644
index 0000000..d58915a
--- /dev/null
+++ b/Lesson4Task1/Lesson4Task4/Lesson4Task4.csproj
@@ -0,0 +1,61 @@
+
+
+
+
+ Debug
+ AnyCPU
+ {0AB9ED87-1196-41FE-A505-69C49C4D5AEF}
+ Exe
+ Properties
+ Lesson4Task4
+ Lesson4Task4
+ v4.8
+ 512
+ true
+
+
+
+ AnyCPU
+ true
+ full
+ false
+ bin\Debug\
+ DEBUG;TRACE
+ prompt
+ 4
+
+
+ AnyCPU
+ pdbonly
+ true
+ bin\Release\
+ TRACE
+ prompt
+ 4
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
\ No newline at end of file
diff --git a/Lesson4Task1/Lesson4Task4/Program.cs b/Lesson4Task1/Lesson4Task4/Program.cs
new file mode 100644
index 0000000..239f11f
--- /dev/null
+++ b/Lesson4Task1/Lesson4Task4/Program.cs
@@ -0,0 +1,29 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Lesson4Task4
+{
+ class Program
+ {
+ static int CalcFib(int n)
+ {
+
+ if (n < 2)
+ return 1;
+
+ int Result = CalcFib(n - 1) + CalcFib(n - 2);
+ // Console.Write($" {Result}, ");
+ return Result;
+ }
+ static void Main(string[] args)
+ {
+ Console.WriteLine("Введите положительное число для вывода Фибоначчи:");
+ int input = int.Parse(Console.ReadLine());
+ Console.WriteLine("Число Фибоначчи:");
+ Console.Write($" {CalcFib(input)} ");
+ }
+ }
+}
diff --git a/Lesson4Task1/Lesson4Task4/Properties/AssemblyInfo.cs b/Lesson4Task1/Lesson4Task4/Properties/AssemblyInfo.cs
new file mode 100644
index 0000000..8003992
--- /dev/null
+++ b/Lesson4Task1/Lesson4Task4/Properties/AssemblyInfo.cs
@@ -0,0 +1,36 @@
+using System.Reflection;
+using System.Runtime.CompilerServices;
+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("Lesson4Task4")]
+[assembly: AssemblyDescription("")]
+[assembly: AssemblyConfiguration("")]
+[assembly: AssemblyCompany("")]
+[assembly: AssemblyProduct("Lesson4Task4")]
+[assembly: AssemblyCopyright("Copyright © 2021")]
+[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("0ab9ed87-1196-41fe-a505-69c49c4d5aef")]
+
+// 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")]