first commit

2024-12-27 21:10:11 +03:00
--- a/lab4.docx
+++ b/lab4.docx
--- a/task1_2/Release/task1_2.exe
+++ b/task1_2/Release/task1_2.exe
--- a/task1_2/task1_2.cpp
+++ b/task1_2/task1_2.cpp
@@ -0,0 +1,92 @@
+#include <iostream>
+using namespace std;
+char digits[] = "0123456789ABCDEF";
+
+const uint8_t*
+as_bytes(const void* data) {
+	return reinterpret_cast<const uint8_t*>(data);
+}
+
+char nibble_to_hex(uint8_t i) {
+	return digits[i & 0xf];
+}
+void print_in_hex(uint8_t byte) {
+	cout << nibble_to_hex(byte >> 4)
+		<< nibble_to_hex(byte & 0xf);
+}
+void print_in_hex(const void* data, size_t size) {
+	const uint8_t *bytes = as_bytes(data);
+	for (size_t i = 0; i < size; i++) {
+		print_in_hex(bytes[i]);
+		if ((i + 1) % 16 == 0) {
+			cout << '\n';
+		}
+		else {
+			cout << ' ';
+		}
+	}
+}
+char bit_digit(uint8_t byte, uint8_t bit) {
+	if (byte &(0x1 << bit)) {
+		return '1';
+	}
+	return '0';
+}
+
+void print_in_binary(uint8_t byte) {
+	for (int bit = 7; bit >= 0; bit--) {
+		cout << bit_digit(byte, bit);
+	}
+}
+void print_in_binary(const void* data, size_t size) {
+	const uint8_t *bytes = as_bytes(data);
+	for (size_t i = 0; i < size; i++) {
+		print_in_binary(bytes[i]);
+		if ((i + 1) % 4 == 0) {
+			cout << '\n';
+		}
+		else {
+			cout << ' ';
+		}
+	}
+}
+int main() {
+	uint16_t c1, c2, result = 0;
+	char operation[8];
+	bool calculated = false;
+	cout << "Input expression: ";
+	cin >> c1 >> operation >> c2;
+	switch (operation[0]) {
+	case '&':
+		result = c1&c2;
+		calculated = true;
+		break;
+	case '|':
+		result = c1 | c2;
+		calculated = true;
+		break;
+	case '^':
+		result = c1 ^ c2;
+		calculated = true;
+		break;
+	default:
+		cout << "Unknown operation\n";
+		break;
+	}
+	if (calculated) {
+		print_in_hex(&c1, sizeof(uint16_t));
+		cout << " & ";
+		print_in_hex(&c2, sizeof(uint16_t));
+		cout << " = ";
+		print_in_hex(&result, sizeof(uint16_t));
+		cout << "\n";
+		print_in_binary(&c1, sizeof(uint16_t));
+		cout << " &\n";
+		print_in_binary(&c2, sizeof(uint16_t));
+		cout << " =\n";
+		print_in_binary(&result, sizeof(uint16_t));
+		cout << "\n";
+	}
+	cin >> result;
+}
+
--- a/task1_2/task1_2.sln
+++ b/task1_2/task1_2.sln
@@ -0,0 +1,28 @@
+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio 14
+VisualStudioVersion = 14.0.25420.1
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "task1_2", "task1_2.vcxproj", "{4F3F55AA-4FBD-448A-BB30-90F4A44C2907}"
+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
+		{4F3F55AA-4FBD-448A-BB30-90F4A44C2907}.Debug|x64.ActiveCfg = Debug|x64
+		{4F3F55AA-4FBD-448A-BB30-90F4A44C2907}.Debug|x64.Build.0 = Debug|x64
+		{4F3F55AA-4FBD-448A-BB30-90F4A44C2907}.Debug|x86.ActiveCfg = Debug|Win32
+		{4F3F55AA-4FBD-448A-BB30-90F4A44C2907}.Debug|x86.Build.0 = Debug|Win32
+		{4F3F55AA-4FBD-448A-BB30-90F4A44C2907}.Release|x64.ActiveCfg = Release|x64
+		{4F3F55AA-4FBD-448A-BB30-90F4A44C2907}.Release|x64.Build.0 = Release|x64
+		{4F3F55AA-4FBD-448A-BB30-90F4A44C2907}.Release|x86.ActiveCfg = Release|Win32
+		{4F3F55AA-4FBD-448A-BB30-90F4A44C2907}.Release|x86.Build.0 = Release|Win32
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+EndGlobal
--- a/task1_2/task1_2.vcxproj
+++ b/task1_2/task1_2.vcxproj
@@ -0,0 +1,154 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project DefaultTargets="Build" ToolsVersion="14.0" 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">
+    <ProjectGuid>{4F3F55AA-4FBD-448A-BB30-90F4A44C2907}</ProjectGuid>
+    <Keyword>Win32Proj</Keyword>
+    <RootNamespace>task1_2</RootNamespace>
+    <WindowsTargetPlatformVersion>8.1</WindowsTargetPlatformVersion>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>true</UseDebugLibraries>
+    <PlatformToolset>v140</PlatformToolset>
+    <CharacterSet>Unicode</CharacterSet>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>false</UseDebugLibraries>
+    <PlatformToolset>v140</PlatformToolset>
+    <WholeProgramOptimization>true</WholeProgramOptimization>
+    <CharacterSet>Unicode</CharacterSet>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>true</UseDebugLibraries>
+    <PlatformToolset>v140</PlatformToolset>
+    <CharacterSet>Unicode</CharacterSet>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>false</UseDebugLibraries>
+    <PlatformToolset>v140</PlatformToolset>
+    <WholeProgramOptimization>true</WholeProgramOptimization>
+    <CharacterSet>Unicode</CharacterSet>
+  </PropertyGroup>
+  <Import Project="$(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" />
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+    <LinkIncremental>true</LinkIncremental>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
+    <LinkIncremental>true</LinkIncremental>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
+    <LinkIncremental>false</LinkIncremental>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
+    <LinkIncremental>false</LinkIncremental>
+  </PropertyGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+    <ClCompile>
+      <PrecompiledHeader>
+      </PrecompiledHeader>
+      <WarningLevel>Level3</WarningLevel>
+      <Optimization>Disabled</Optimization>
+      <PreprocessorDefinitions>WIN32;_DEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <SDLCheck>true</SDLCheck>
+    </ClCompile>
+    <Link>
+      <SubSystem>Console</SubSystem>
+      <GenerateDebugInformation>true</GenerateDebugInformation>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
+    <ClCompile>
+      <PrecompiledHeader>
+      </PrecompiledHeader>
+      <WarningLevel>Level3</WarningLevel>
+      <Optimization>Disabled</Optimization>
+      <PreprocessorDefinitions>_DEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <SDLCheck>true</SDLCheck>
+    </ClCompile>
+    <Link>
+      <SubSystem>Console</SubSystem>
+      <GenerateDebugInformation>true</GenerateDebugInformation>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
+    <ClCompile>
+      <WarningLevel>Level3</WarningLevel>
+      <PrecompiledHeader>
+      </PrecompiledHeader>
+      <Optimization>MaxSpeed</Optimization>
+      <FunctionLevelLinking>true</FunctionLevelLinking>
+      <IntrinsicFunctions>true</IntrinsicFunctions>
+      <PreprocessorDefinitions>WIN32;NDEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <SDLCheck>true</SDLCheck>
+    </ClCompile>
+    <Link>
+      <SubSystem>Console</SubSystem>
+      <EnableCOMDATFolding>true</EnableCOMDATFolding>
+      <OptimizeReferences>true</OptimizeReferences>
+      <GenerateDebugInformation>true</GenerateDebugInformation>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
+    <ClCompile>
+      <WarningLevel>Level3</WarningLevel>
+      <PrecompiledHeader>
+      </PrecompiledHeader>
+      <Optimization>MaxSpeed</Optimization>
+      <FunctionLevelLinking>true</FunctionLevelLinking>
+      <IntrinsicFunctions>true</IntrinsicFunctions>
+      <PreprocessorDefinitions>NDEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <SDLCheck>true</SDLCheck>
+    </ClCompile>
+    <Link>
+      <SubSystem>Console</SubSystem>
+      <EnableCOMDATFolding>true</EnableCOMDATFolding>
+      <OptimizeReferences>true</OptimizeReferences>
+      <GenerateDebugInformation>true</GenerateDebugInformation>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemGroup>
+    <ClCompile Include="task1_2.cpp" />
+  </ItemGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
+  <ImportGroup Label="ExtensionTargets">
+  </ImportGroup>
+</Project>
--- a/task1_2/task1_2.vcxproj.filters
+++ b/task1_2/task1_2.vcxproj.filters
@@ -0,0 +1,22 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <ItemGroup>
+    <Filter Include="Source Files">
+      <UniqueIdentifier>{4FC737F1-C7A5-4376-A066-2A32D752A2FF}</UniqueIdentifier>
+      <Extensions>cpp;c;cc;cxx;def;odl;idl;hpj;bat;asm;asmx</Extensions>
+    </Filter>
+    <Filter Include="Header Files">
+      <UniqueIdentifier>{93995380-89BD-4b04-88EB-625FBE52EBFB}</UniqueIdentifier>
+      <Extensions>h;hh;hpp;hxx;hm;inl;inc;xsd</Extensions>
+    </Filter>
+    <Filter Include="Resource Files">
+      <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="task1_2.cpp">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+  </ItemGroup>
+</Project>
--- a/task3/Release/task3.exe
+++ b/task3/Release/task3.exe
--- a/task3/task3.cpp
+++ b/task3/task3.cpp
@@ -0,0 +1,135 @@
+#include <iostream>
+using namespace std;
+
+struct Student {
+	char Name[17];
+	uint16_t Year_of_receipt;
+	float Average_score;
+	uint16_t Sex : 1;
+	uint16_t Finished_courses;
+	Student *Team_lead;
+};
+
+char digits[] = "0123456789ABCDEF";
+const uint8_t*
+as_bytes(const void* data) {
+	return reinterpret_cast<const uint8_t*>(data);
+}
+
+char nibble_to_hex(uint8_t i) {
+	return digits[i & 0xf];
+}
+void print_in_hex(uint8_t byte) {
+	cout << nibble_to_hex(byte >> 4)
+		<< nibble_to_hex(byte & 0xf);
+}
+void print_in_hex(const void* data, size_t size) {
+	const uint8_t *bytes = as_bytes(data);
+	for (size_t i = 0; i < size; i++) {
+		print_in_hex(bytes[i]);
+		if ((i + 1) % 16 == 0) {
+			cout << '\n';
+		}
+		else {
+			cout << ' ';
+		}
+	}
+}
+char bit_digit(uint8_t byte, uint8_t bit) {
+	if (byte &(0x1 << bit)) {
+		return '1';
+	}
+	return '0';
+}
+
+void print_in_binary(uint8_t byte) {
+	for (int bit = 7; bit >= 0; bit--) {
+		cout << bit_digit(byte, bit);
+	}
+}
+void print_in_binary(const void* data, size_t size) {
+	const uint8_t *bytes = as_bytes(data);
+	for (size_t i = 0; i < size; i++) {
+		print_in_binary(bytes[i]);
+		if ((i + 1) % 4 == 0) {
+			cout << '\n';
+		}
+		else {
+			cout << ' ';
+		}
+	}
+}
+
+int main() {
+	Student students[3];
+	uint16_t gender;
+	for (int i = 0; i < 3; i++) {
+		if (i != 0) {
+			cout << "Student " << i << ":\n";
+			students[i].Team_lead = &students[0];
+		}
+		else {
+			students[i].Team_lead = NULL;
+			cout << "Team lead:\n";
+		}
+		cout << "Name: ";
+		cin >> students[i].Name;
+		cout << "Year of receiption: ";
+		cin >> students[i].Year_of_receipt;
+		cout << "Average score: ";
+		cin >> students[i].Average_score;
+		cout << "Gender (0-1): ";
+		cin >> gender;
+		students[i].Sex = gender;
+		cout << "Courses: ";
+		cin >> students[i].Finished_courses;
+	}
+
+	cout << "Array address: " << (void*)students << "\n";
+	cout << "Array size: " << sizeof(students) << "\n";
+	for (int i = 0; i < 3; i++) {
+		cout << "Address of element " << i << ": " << (void*)&students[i] << "\n";
+		cout << "Size of element: " << i << ": " << sizeof(Student) << "\n";
+	}
+	cout << "students[1]:\n";
+	cout << "Name: address = " << (void*)&students[1].Name
+		<< " offset = " << offsetof(Student, Name)
+		<< " size = " << sizeof(students[1].Name) << "\nhex:\n";
+	print_in_hex(&students[1].Name, sizeof(students[1].Name));
+	cout << "\nIn binary:\n";
+	print_in_binary(&students[1].Name, sizeof(students[1].Name));
+
+	cout << "\n\nYear_of_receipt: address = " << (void*)&students[1].Year_of_receipt
+		<< " offset = " << offsetof(Student, Year_of_receipt)
+		<< " size = " << sizeof(students[1].Year_of_receipt) << "\nhex:\n";
+	print_in_hex(&students[1].Year_of_receipt, sizeof(students[1].Year_of_receipt));
+	cout << "\nIn binary:\n";
+	print_in_binary(&students[1].Year_of_receipt, sizeof(students[1].Year_of_receipt));
+
+	cout << "\n\nAverage_score: address = " << (void*)&students[1].Average_score
+		<< " offset = " << offsetof(Student, Average_score)
+		<< " size = " << sizeof(students[1].Average_score) << "\nhex:\n";
+	print_in_hex(&students[1].Average_score, sizeof(students[1].Average_score));
+	cout << "\nIn binary:\n";
+	print_in_binary(&students[1].Average_score, sizeof(students[1].Average_score));
+
+	cout << "\n\nFinished_courses: address = " << (void*)&students[1].Finished_courses
+		<< " offset = " << offsetof(Student, Finished_courses)
+		<< " size = " << sizeof(students[1].Finished_courses) << "\nhex:\n";
+	print_in_hex(&students[1].Finished_courses, sizeof(students[1].Finished_courses));
+	cout << "\nIn binary:\n";
+	print_in_binary(&students[1].Finished_courses, sizeof(students[1].Finished_courses));
+
+	cout << "\n\nTeam_lead: address = " << (void*)&students[1].Team_lead
+		<< " offset = " << offsetof(Student, Team_lead)
+		<< " size = " << sizeof(students[1].Team_lead) << "\nhex:\n";
+	print_in_hex(&students[1].Team_lead, sizeof(students[1].Team_lead));
+	cout << "\nIn binary:\n";
+	print_in_binary(&students[1].Team_lead, sizeof(students[1].Team_lead));
+	cout << "\nFull array:\n";
+	print_in_hex(students, sizeof(students));
+	cout << "\nIn binary:\n";
+	print_in_binary(students, sizeof(students));
+	cin >> gender;
+	return 0;
+}
--- a/task3/task3.sln
+++ b/task3/task3.sln
@@ -0,0 +1,28 @@
+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio 14
+VisualStudioVersion = 14.0.25420.1
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "task3", "task3.vcxproj", "{61673896-8D28-4E1E-8522-FCAD2883C239}"
+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
+		{61673896-8D28-4E1E-8522-FCAD2883C239}.Debug|x64.ActiveCfg = Debug|x64
+		{61673896-8D28-4E1E-8522-FCAD2883C239}.Debug|x64.Build.0 = Debug|x64
+		{61673896-8D28-4E1E-8522-FCAD2883C239}.Debug|x86.ActiveCfg = Debug|Win32
+		{61673896-8D28-4E1E-8522-FCAD2883C239}.Debug|x86.Build.0 = Debug|Win32
+		{61673896-8D28-4E1E-8522-FCAD2883C239}.Release|x64.ActiveCfg = Release|x64
+		{61673896-8D28-4E1E-8522-FCAD2883C239}.Release|x64.Build.0 = Release|x64
+		{61673896-8D28-4E1E-8522-FCAD2883C239}.Release|x86.ActiveCfg = Release|Win32
+		{61673896-8D28-4E1E-8522-FCAD2883C239}.Release|x86.Build.0 = Release|Win32
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+EndGlobal
--- a/task3/task3.vcxproj
+++ b/task3/task3.vcxproj
@@ -0,0 +1,154 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project DefaultTargets="Build" ToolsVersion="14.0" 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">
+    <ProjectGuid>{61673896-8D28-4E1E-8522-FCAD2883C239}</ProjectGuid>
+    <Keyword>Win32Proj</Keyword>
+    <RootNamespace>task3</RootNamespace>
+    <WindowsTargetPlatformVersion>8.1</WindowsTargetPlatformVersion>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>true</UseDebugLibraries>
+    <PlatformToolset>v140</PlatformToolset>
+    <CharacterSet>Unicode</CharacterSet>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>false</UseDebugLibraries>
+    <PlatformToolset>v140</PlatformToolset>
+    <WholeProgramOptimization>true</WholeProgramOptimization>
+    <CharacterSet>Unicode</CharacterSet>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>true</UseDebugLibraries>
+    <PlatformToolset>v140</PlatformToolset>
+    <CharacterSet>Unicode</CharacterSet>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>false</UseDebugLibraries>
+    <PlatformToolset>v140</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.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+  </ImportGroup>
+  <PropertyGroup Label="UserMacros" />
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+    <LinkIncremental>true</LinkIncremental>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
+    <LinkIncremental>true</LinkIncremental>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
+    <LinkIncremental>false</LinkIncremental>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
+    <LinkIncremental>false</LinkIncremental>
+  </PropertyGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+    <ClCompile>
+      <PrecompiledHeader>
+      </PrecompiledHeader>
+      <WarningLevel>Level3</WarningLevel>
+      <Optimization>Disabled</Optimization>
+      <PreprocessorDefinitions>WIN32;_DEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <SDLCheck>true</SDLCheck>
+    </ClCompile>
+    <Link>
+      <SubSystem>Console</SubSystem>
+      <GenerateDebugInformation>true</GenerateDebugInformation>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
+    <ClCompile>
+      <PrecompiledHeader>
+      </PrecompiledHeader>
+      <WarningLevel>Level3</WarningLevel>
+      <Optimization>Disabled</Optimization>
+      <PreprocessorDefinitions>_DEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <SDLCheck>true</SDLCheck>
+    </ClCompile>
+    <Link>
+      <SubSystem>Console</SubSystem>
+      <GenerateDebugInformation>true</GenerateDebugInformation>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
+    <ClCompile>
+      <WarningLevel>Level3</WarningLevel>
+      <PrecompiledHeader>
+      </PrecompiledHeader>
+      <Optimization>MaxSpeed</Optimization>
+      <FunctionLevelLinking>true</FunctionLevelLinking>
+      <IntrinsicFunctions>true</IntrinsicFunctions>
+      <PreprocessorDefinitions>WIN32;NDEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <SDLCheck>true</SDLCheck>
+    </ClCompile>
+    <Link>
+      <SubSystem>Console</SubSystem>
+      <EnableCOMDATFolding>true</EnableCOMDATFolding>
+      <OptimizeReferences>true</OptimizeReferences>
+      <GenerateDebugInformation>true</GenerateDebugInformation>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
+    <ClCompile>
+      <WarningLevel>Level3</WarningLevel>
+      <PrecompiledHeader>
+      </PrecompiledHeader>
+      <Optimization>MaxSpeed</Optimization>
+      <FunctionLevelLinking>true</FunctionLevelLinking>
+      <IntrinsicFunctions>true</IntrinsicFunctions>
+      <PreprocessorDefinitions>NDEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <SDLCheck>true</SDLCheck>
+    </ClCompile>
+    <Link>
+      <SubSystem>Console</SubSystem>
+      <EnableCOMDATFolding>true</EnableCOMDATFolding>
+      <OptimizeReferences>true</OptimizeReferences>
+      <GenerateDebugInformation>true</GenerateDebugInformation>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemGroup>
+    <ClCompile Include="task3.cpp" />
+  </ItemGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
+  <ImportGroup Label="ExtensionTargets">
+  </ImportGroup>
+</Project>
--- a/task3/task3.vcxproj.filters
+++ b/task3/task3.vcxproj.filters
@@ -0,0 +1,22 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <ItemGroup>
+    <Filter Include="Source Files">
+      <UniqueIdentifier>{4FC737F1-C7A5-4376-A066-2A32D752A2FF}</UniqueIdentifier>
+      <Extensions>cpp;c;cc;cxx;def;odl;idl;hpj;bat;asm;asmx</Extensions>
+    </Filter>
+    <Filter Include="Header Files">
+      <UniqueIdentifier>{93995380-89BD-4b04-88EB-625FBE52EBFB}</UniqueIdentifier>
+      <Extensions>h;hh;hpp;hxx;hm;inl;inc;xsd</Extensions>
+    </Filter>
+    <Filter Include="Resource Files">
+      <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="task3.cpp">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+  </ItemGroup>
+</Project>
--- a/task4/Release/task4.exe
+++ b/task4/Release/task4.exe
--- a/task4/Release/test.txt
+++ b/task4/Release/test.txt
@@ -0,0 +1,3 @@
+hello, world!
+to be or not to be
+toster
--- a/task4/task4.cpp
+++ b/task4/task4.cpp
@@ -0,0 +1,90 @@
+#define _CRT_SECURE_NO_WARNINGS
+#include <iostream>
+#include <cstdio>
+
+
+void getstring(char *s, size_t n) {
+	fgets(s, n, stdin);
+	if (s[strlen(s) - 1] == '\n')
+		s[strlen(s) - 1] = '\0';
+}
+
+void lower(char *s)
+{
+	for (; *s; s++)
+		*s = tolower(*s);
+}
+using namespace std;
+const size_t MAX_SIZE = 256;
+const char not_allowed[] = "*\"<>?|";
+const char separators[] = " \r\n,.!?:;()-";
+bool iscorrectname(char *name) {
+	char lext[8];
+	for (int i = 0; name[i]; i++) {
+		if (strchr(not_allowed, name[i]) != 0)
+			return false;
+	}
+	char *colon = strchr(name, ':');
+	if (colon != NULL) {
+		if (colon - name != 2)
+			return false;
+		if (colon[1] != '\\')
+			return false;
+		if (strrchr(name, ':') != colon)
+			return false;
+	}
+	char *fname = strrchr(name, '\\');
+	fname = fname ? fname++ : name;
+	char *ext = strchr(fname, '.');
+	if (ext == NULL)
+		strcat(name, ".txt");
+	else {
+		strcpy(lext, ext);
+		lower(lext);
+		if (strcmp(lext, ".txt"))
+			return false;
+	}
+	return true;
+}
+int main() {
+	char filename[MAX_SIZE];
+	char str[MAX_SIZE];
+	cout << "Input file: ";
+	getstring(filename, MAX_SIZE);
+	if (iscorrectname(filename) == false) {
+		cout << "Entered not correct name\n";
+		return -1;
+	}
+	FILE *fin = fopen(filename, "rb");
+	if (fin == NULL) {
+		cout << "Can't open file\n";
+		return -1;
+	}
+	fseek(fin, 0, SEEK_END);
+	size_t length = ftell(fin);
+	fseek(fin, 0, SEEK_SET);
+	char *text = new char[length + 1];
+	memset(text, 0, length + 1);
+	fread(text, 1, length, fin);
+	cout << "Input string: ";
+	getstring(str, MAX_SIZE);
+	const char *start = text;
+	size_t count = 0;
+	while (true) {
+		const size_t separator_count = strspn(start, separators);
+		start += separator_count;
+		if (start[0] == '\0') {
+			break;
+		}
+		const size_t word_length = strcspn(start, separators);
+		if (word_length == strlen(str) && strncmp(str, start, word_length) == 0) {
+			count++;
+		}
+		start += word_length;
+	}
+	cout << "Result: " << count << "\n";
+	fclose(fin);
+	delete text;
+	cin >> str;
+	return 0;
+}
--- a/task4/task4.sln
+++ b/task4/task4.sln
@@ -0,0 +1,28 @@
+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio 14
+VisualStudioVersion = 14.0.25420.1
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "task4", "task4.vcxproj", "{F1C3E237-5C45-4A39-8BB2-B09801F54B93}"
+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
+		{F1C3E237-5C45-4A39-8BB2-B09801F54B93}.Debug|x64.ActiveCfg = Debug|x64
+		{F1C3E237-5C45-4A39-8BB2-B09801F54B93}.Debug|x64.Build.0 = Debug|x64
+		{F1C3E237-5C45-4A39-8BB2-B09801F54B93}.Debug|x86.ActiveCfg = Debug|Win32
+		{F1C3E237-5C45-4A39-8BB2-B09801F54B93}.Debug|x86.Build.0 = Debug|Win32
+		{F1C3E237-5C45-4A39-8BB2-B09801F54B93}.Release|x64.ActiveCfg = Release|x64
+		{F1C3E237-5C45-4A39-8BB2-B09801F54B93}.Release|x64.Build.0 = Release|x64
+		{F1C3E237-5C45-4A39-8BB2-B09801F54B93}.Release|x86.ActiveCfg = Release|Win32
+		{F1C3E237-5C45-4A39-8BB2-B09801F54B93}.Release|x86.Build.0 = Release|Win32
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+EndGlobal
--- a/task4/task4.vcxproj
+++ b/task4/task4.vcxproj
@@ -0,0 +1,154 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project DefaultTargets="Build" ToolsVersion="14.0" 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">
+    <ProjectGuid>{F1C3E237-5C45-4A39-8BB2-B09801F54B93}</ProjectGuid>
+    <Keyword>Win32Proj</Keyword>
+    <RootNamespace>task4</RootNamespace>
+    <WindowsTargetPlatformVersion>8.1</WindowsTargetPlatformVersion>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>true</UseDebugLibraries>
+    <PlatformToolset>v140</PlatformToolset>
+    <CharacterSet>Unicode</CharacterSet>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>false</UseDebugLibraries>
+    <PlatformToolset>v140</PlatformToolset>
+    <WholeProgramOptimization>true</WholeProgramOptimization>
+    <CharacterSet>Unicode</CharacterSet>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>true</UseDebugLibraries>
+    <PlatformToolset>v140</PlatformToolset>
+    <CharacterSet>Unicode</CharacterSet>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>false</UseDebugLibraries>
+    <PlatformToolset>v140</PlatformToolset>
+    <WholeProgramOptimization>true</WholeProgramOptimization>
+    <CharacterSet>Unicode</CharacterSet>
+  </PropertyGroup>
+  <Import Project="$(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" />
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+    <LinkIncremental>true</LinkIncremental>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
+    <LinkIncremental>true</LinkIncremental>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
+    <LinkIncremental>false</LinkIncremental>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
+    <LinkIncremental>false</LinkIncremental>
+  </PropertyGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+    <ClCompile>
+      <PrecompiledHeader>
+      </PrecompiledHeader>
+      <WarningLevel>Level3</WarningLevel>
+      <Optimization>Disabled</Optimization>
+      <PreprocessorDefinitions>WIN32;_DEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <SDLCheck>true</SDLCheck>
+    </ClCompile>
+    <Link>
+      <SubSystem>Console</SubSystem>
+      <GenerateDebugInformation>true</GenerateDebugInformation>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
+    <ClCompile>
+      <PrecompiledHeader>
+      </PrecompiledHeader>
+      <WarningLevel>Level3</WarningLevel>
+      <Optimization>Disabled</Optimization>
+      <PreprocessorDefinitions>_DEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <SDLCheck>true</SDLCheck>
+    </ClCompile>
+    <Link>
+      <SubSystem>Console</SubSystem>
+      <GenerateDebugInformation>true</GenerateDebugInformation>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
+    <ClCompile>
+      <WarningLevel>Level3</WarningLevel>
+      <PrecompiledHeader>
+      </PrecompiledHeader>
+      <Optimization>MaxSpeed</Optimization>
+      <FunctionLevelLinking>true</FunctionLevelLinking>
+      <IntrinsicFunctions>true</IntrinsicFunctions>
+      <PreprocessorDefinitions>WIN32;NDEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <SDLCheck>true</SDLCheck>
+    </ClCompile>
+    <Link>
+      <SubSystem>Console</SubSystem>
+      <EnableCOMDATFolding>true</EnableCOMDATFolding>
+      <OptimizeReferences>true</OptimizeReferences>
+      <GenerateDebugInformation>true</GenerateDebugInformation>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
+    <ClCompile>
+      <WarningLevel>Level3</WarningLevel>
+      <PrecompiledHeader>
+      </PrecompiledHeader>
+      <Optimization>MaxSpeed</Optimization>
+      <FunctionLevelLinking>true</FunctionLevelLinking>
+      <IntrinsicFunctions>true</IntrinsicFunctions>
+      <PreprocessorDefinitions>NDEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <SDLCheck>true</SDLCheck>
+    </ClCompile>
+    <Link>
+      <SubSystem>Console</SubSystem>
+      <EnableCOMDATFolding>true</EnableCOMDATFolding>
+      <OptimizeReferences>true</OptimizeReferences>
+      <GenerateDebugInformation>true</GenerateDebugInformation>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemGroup>
+    <ClCompile Include="task4.cpp" />
+  </ItemGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
+  <ImportGroup Label="ExtensionTargets">
+  </ImportGroup>
+</Project>
--- a/task4/task4.vcxproj.filters
+++ b/task4/task4.vcxproj.filters
@@ -0,0 +1,22 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <ItemGroup>
+    <Filter Include="Source Files">
+      <UniqueIdentifier>{4FC737F1-C7A5-4376-A066-2A32D752A2FF}</UniqueIdentifier>
+      <Extensions>cpp;c;cc;cxx;def;odl;idl;hpj;bat;asm;asmx</Extensions>
+    </Filter>
+    <Filter Include="Header Files">
+      <UniqueIdentifier>{93995380-89BD-4b04-88EB-625FBE52EBFB}</UniqueIdentifier>
+      <Extensions>h;hh;hpp;hxx;hm;inl;inc;xsd</Extensions>
+    </Filter>
+    <Filter Include="Resource Files">
+      <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="task4.cpp">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+  </ItemGroup>
+</Project>
--- a/task4/test.txt
+++ b/task4/test.txt
@@ -0,0 +1,3 @@
+hello, world!
+to be or not to be
+toster