diff --git a/lab 4/lab 4.sln b/lab 4/lab 4.sln
new file mode 100644
index 0000000..6f4f5aa
--- /dev/null
+++ b/lab 4/lab 4.sln	
@@ -0,0 +1,31 @@
+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 17
+VisualStudioVersion = 17.11.35303.130
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "lab 4", "lab 4\lab 4.vcxproj", "{D74FEE26-DF5C-43B3-8DCD-43DFEE8C005B}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|x64 = Debug|x64
+		Debug|x86 = Debug|x86
+		Release|x64 = Release|x64
+		Release|x86 = Release|x86
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{D74FEE26-DF5C-43B3-8DCD-43DFEE8C005B}.Debug|x64.ActiveCfg = Debug|x64
+		{D74FEE26-DF5C-43B3-8DCD-43DFEE8C005B}.Debug|x64.Build.0 = Debug|x64
+		{D74FEE26-DF5C-43B3-8DCD-43DFEE8C005B}.Debug|x86.ActiveCfg = Debug|Win32
+		{D74FEE26-DF5C-43B3-8DCD-43DFEE8C005B}.Debug|x86.Build.0 = Debug|Win32
+		{D74FEE26-DF5C-43B3-8DCD-43DFEE8C005B}.Release|x64.ActiveCfg = Release|x64
+		{D74FEE26-DF5C-43B3-8DCD-43DFEE8C005B}.Release|x64.Build.0 = Release|x64
+		{D74FEE26-DF5C-43B3-8DCD-43DFEE8C005B}.Release|x86.ActiveCfg = Release|Win32
+		{D74FEE26-DF5C-43B3-8DCD-43DFEE8C005B}.Release|x86.Build.0 = Release|Win32
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {4076F7A6-5447-4DC3-AD1D-11B0FAF4A187}
+	EndGlobalSection
+EndGlobal
diff --git a/lab 4/lab 4/lab 4.c b/lab 4/lab 4/lab 4.c
new file mode 100644
index 0000000..bf886fd
--- /dev/null
+++ b/lab 4/lab 4/lab 4.c	
@@ -0,0 +1,23 @@
+//#include <stdio.h>
+//#include <Windows.h>
+//
+//void main() {
+//    SetConsoleCP(1251);
+//    SetConsoleOutputCP(1251);
+//    int n;
+//    int i;
+//    int s;
+//
+//
+//    printf("���� n = ");
+//    scanf_s("%d", &n);
+//
+//    i = 2;
+//    s = 0;
+//    do {
+//        printf("%d ", i);
+//        i = i + 2;
+//        s++;
+//    } while (s < n);
+//
+//}
\ No newline at end of file
diff --git a/lab 4/lab 4/lab 4.vcxproj b/lab 4/lab 4/lab 4.vcxproj
new file mode 100644
index 0000000..1e60620
--- /dev/null
+++ b/lab 4/lab 4/lab 4.vcxproj	
@@ -0,0 +1,140 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <ItemGroup Label="ProjectConfigurations">
+    <ProjectConfiguration Include="Debug|Win32">
+      <Configuration>Debug</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|Win32">
+      <Configuration>Release</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Debug|x64">
+      <Configuration>Debug</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|x64">
+      <Configuration>Release</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+  </ItemGroup>
+  <PropertyGroup Label="Globals">
+    <VCProjectVersion>17.0</VCProjectVersion>
+    <Keyword>Win32Proj</Keyword>
+    <ProjectGuid>{d74fee26-df5c-43b3-8dcd-43dfee8c005b}</ProjectGuid>
+    <RootNamespace>lab4</RootNamespace>
+    <WindowsTargetPlatformVersion>10.0</WindowsTargetPlatformVersion>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>true</UseDebugLibraries>
+    <PlatformToolset>v143</PlatformToolset>
+    <CharacterSet>Unicode</CharacterSet>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>false</UseDebugLibraries>
+    <PlatformToolset>v143</PlatformToolset>
+    <WholeProgramOptimization>true</WholeProgramOptimization>
+    <CharacterSet>Unicode</CharacterSet>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>true</UseDebugLibraries>
+    <PlatformToolset>v143</PlatformToolset>
+    <CharacterSet>Unicode</CharacterSet>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>false</UseDebugLibraries>
+    <PlatformToolset>v143</PlatformToolset>
+    <WholeProgramOptimization>true</WholeProgramOptimization>
+    <CharacterSet>Unicode</CharacterSet>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
+  <ImportGroup Label="ExtensionSettings">
+  </ImportGroup>
+  <ImportGroup Label="Shared">
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+  </ImportGroup>
+  <PropertyGroup Label="UserMacros" />
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+    <ClCompile>
+      <WarningLevel>Level3</WarningLevel>
+      <SDLCheck>true</SDLCheck>
+      <PreprocessorDefinitions>WIN32;_DEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <ConformanceMode>true</ConformanceMode>
+    </ClCompile>
+    <Link>
+      <SubSystem>Console</SubSystem>
+      <GenerateDebugInformation>true</GenerateDebugInformation>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
+    <ClCompile>
+      <WarningLevel>Level3</WarningLevel>
+      <FunctionLevelLinking>true</FunctionLevelLinking>
+      <IntrinsicFunctions>true</IntrinsicFunctions>
+      <SDLCheck>true</SDLCheck>
+      <PreprocessorDefinitions>WIN32;NDEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <ConformanceMode>true</ConformanceMode>
+    </ClCompile>
+    <Link>
+      <SubSystem>Console</SubSystem>
+      <EnableCOMDATFolding>true</EnableCOMDATFolding>
+      <OptimizeReferences>true</OptimizeReferences>
+      <GenerateDebugInformation>true</GenerateDebugInformation>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
+    <ClCompile>
+      <WarningLevel>Level3</WarningLevel>
+      <SDLCheck>true</SDLCheck>
+      <PreprocessorDefinitions>_DEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <ConformanceMode>true</ConformanceMode>
+    </ClCompile>
+    <Link>
+      <SubSystem>Console</SubSystem>
+      <GenerateDebugInformation>true</GenerateDebugInformation>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
+    <ClCompile>
+      <WarningLevel>Level3</WarningLevel>
+      <FunctionLevelLinking>true</FunctionLevelLinking>
+      <IntrinsicFunctions>true</IntrinsicFunctions>
+      <SDLCheck>true</SDLCheck>
+      <PreprocessorDefinitions>NDEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <ConformanceMode>true</ConformanceMode>
+    </ClCompile>
+    <Link>
+      <SubSystem>Console</SubSystem>
+      <EnableCOMDATFolding>true</EnableCOMDATFolding>
+      <OptimizeReferences>true</OptimizeReferences>
+      <GenerateDebugInformation>true</GenerateDebugInformation>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemGroup>
+    <ClCompile Include="lab 4.c" />
+    <ClCompile Include="n четные.c" />
+    <ClCompile Include="деньги.c" />
+    <ClCompile Include="месяца.c" />
+    <ClCompile Include="популяция.c" />
+    <ClCompile Include="фиббоначи.c" />
+  </ItemGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
+  <ImportGroup Label="ExtensionTargets">
+  </ImportGroup>
+</Project>
\ No newline at end of file
diff --git a/lab 4/lab 4/lab 4.vcxproj.filters b/lab 4/lab 4/lab 4.vcxproj.filters
new file mode 100644
index 0000000..986c617
--- /dev/null
+++ b/lab 4/lab 4/lab 4.vcxproj.filters	
@@ -0,0 +1,37 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <ItemGroup>
+    <Filter Include="Исходные файлы">
+      <UniqueIdentifier>{4FC737F1-C7A5-4376-A066-2A32D752A2FF}</UniqueIdentifier>
+      <Extensions>cpp;c;cc;cxx;c++;cppm;ixx;def;odl;idl;hpj;bat;asm;asmx</Extensions>
+    </Filter>
+    <Filter Include="Файлы заголовков">
+      <UniqueIdentifier>{93995380-89BD-4b04-88EB-625FBE52EBFB}</UniqueIdentifier>
+      <Extensions>h;hh;hpp;hxx;h++;hm;inl;inc;ipp;xsd</Extensions>
+    </Filter>
+    <Filter Include="Файлы ресурсов">
+      <UniqueIdentifier>{67DA6AB6-F800-4c08-8B7A-83BB121AAD01}</UniqueIdentifier>
+      <Extensions>rc;ico;cur;bmp;dlg;rc2;rct;bin;rgs;gif;jpg;jpeg;jpe;resx;tiff;tif;png;wav;mfcribbon-ms</Extensions>
+    </Filter>
+  </ItemGroup>
+  <ItemGroup>
+    <ClCompile Include="lab 4.c">
+      <Filter>Исходные файлы</Filter>
+    </ClCompile>
+    <ClCompile Include="n четные.c">
+      <Filter>Исходные файлы</Filter>
+    </ClCompile>
+    <ClCompile Include="деньги.c">
+      <Filter>Исходные файлы</Filter>
+    </ClCompile>
+    <ClCompile Include="популяция.c">
+      <Filter>Исходные файлы</Filter>
+    </ClCompile>
+    <ClCompile Include="фиббоначи.c">
+      <Filter>Исходные файлы</Filter>
+    </ClCompile>
+    <ClCompile Include="месяца.c">
+      <Filter>Исходные файлы</Filter>
+    </ClCompile>
+  </ItemGroup>
+</Project>
\ No newline at end of file
diff --git a/lab 4/lab 4/n четные.c b/lab 4/lab 4/n четные.c
new file mode 100644
index 0000000..6a58246
--- /dev/null
+++ b/lab 4/lab 4/n четные.c	
@@ -0,0 +1,26 @@
+//#include <stdio.h>
+//#include <Windows.h>
+//
+//void main() {
+//    SetConsoleCP(1251);
+//    SetConsoleOutputCP(1251);
+//    int n;
+//    int i;
+//    int s;
+//    int a;
+//
+//
+//    printf("���� n = ");
+//    scanf_s("%d", &n);
+//    printf("���� a = ");
+//    scanf_s("%d", &a);
+//
+//    i = a;
+//    s = 0;
+//    do {
+//        printf("%d ", a);
+//        a = a + i;
+//        s++;
+//    } while (s < n);
+//
+//}
\ No newline at end of file
diff --git a/lab 4/lab 4/деньги.c b/lab 4/lab 4/деньги.c
new file mode 100644
index 0000000..35c35da
--- /dev/null
+++ b/lab 4/lab 4/деньги.c	
@@ -0,0 +1,18 @@
+//#include<stdio.h>
+//
+//void main(){
+//  int sum;
+//  int year;
+//  float percent;
+//  printf("summa = ");
+//  scanf_s("%d", &sum);
+//
+//  printf("procent = ");
+//  scanf_s("%f", &percent);
+//  year = 0;
+//  do {
+//    printf("%d RUB in %d year\n", sum, year);
+//    sum = (sum * (100 + percent)) / 100;
+//    year++;
+//  } while (year <= 10);
+//}
\ No newline at end of file
diff --git a/lab 4/lab 4/месяца.c b/lab 4/lab 4/месяца.c
new file mode 100644
index 0000000..d9d600d
--- /dev/null
+++ b/lab 4/lab 4/месяца.c	
@@ -0,0 +1,26 @@
+//#include<stdio.h>
+//#include<Windows.h>
+//void main() {
+//  SetConsoleCP(1251);
+//  SetConsoleOutputCP(1251);
+//  int i;
+//  int n;
+//  int a;
+//  int f;
+//
+//  printf("n = ");
+//  scanf_s("%d", &n);
+//  printf("������� ������������ ������� = ");
+//  scanf_s("%d", &f);
+//
+//
+//  i = 0;
+//  a = 36;
+//  do {
+//    printf("%d ", n);
+//    n = n + f;
+//    i++;
+//  } while (i < a);
+//    
+//
+//}
\ No newline at end of file
diff --git a/lab 4/lab 4/популяция.c b/lab 4/lab 4/популяция.c
new file mode 100644
index 0000000..c5b9853
--- /dev/null
+++ b/lab 4/lab 4/популяция.c	
@@ -0,0 +1,13 @@
+//#include <stdio.h>
+//void main() {
+//    int year = 2024;
+//    int population = 5000;
+//
+//    do {
+//        printf("%d  inhabitants live in the city in %d\n",
+//            population, year);
+//        population = (population * 103) / 100;
+//        year = year + 1;
+//    } while (year <= 2040);
+//
+//}
\ No newline at end of file
diff --git a/lab 4/lab 4/фиббоначи.c b/lab 4/lab 4/фиббоначи.c
new file mode 100644
index 0000000..55a1e3f
--- /dev/null
+++ b/lab 4/lab 4/фиббоначи.c	
@@ -0,0 +1,27 @@
+//#include<stdio.h>
+//
+//void main() {
+//  int a;
+//  int s;
+//  int c;
+//  int d;
+//  int r;
+//
+//  printf("a = ");
+//  scanf_s("%d", &a);
+//
+//  s = 0;
+//  c = 1;
+//  d = 0;
+//  r = 0;
+//  do {
+//    printf("%d ", s);
+//    r = c + s ;
+//    c = s;
+//    s = r;
+//    d++;
+//  } while (d < a);
+//
+//
+//
+//}
\ No newline at end of file