diff --git a/bits 4.sln b/bits 4.sln
new file mode 100644
index 0000000..b0b274b
--- /dev/null
+++ b/bits 4.sln
@@ -0,0 +1,31 @@
+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 17
+VisualStudioVersion = 17.8.34330.188
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "bits 4", "bits 4\bits 4.vcxproj", "{CEDC70AD-DC0C-436A-B728-EF4CC32E0C81}"
+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
+ {CEDC70AD-DC0C-436A-B728-EF4CC32E0C81}.Debug|x64.ActiveCfg = Debug|x64
+ {CEDC70AD-DC0C-436A-B728-EF4CC32E0C81}.Debug|x64.Build.0 = Debug|x64
+ {CEDC70AD-DC0C-436A-B728-EF4CC32E0C81}.Debug|x86.ActiveCfg = Debug|Win32
+ {CEDC70AD-DC0C-436A-B728-EF4CC32E0C81}.Debug|x86.Build.0 = Debug|Win32
+ {CEDC70AD-DC0C-436A-B728-EF4CC32E0C81}.Release|x64.ActiveCfg = Release|x64
+ {CEDC70AD-DC0C-436A-B728-EF4CC32E0C81}.Release|x64.Build.0 = Release|x64
+ {CEDC70AD-DC0C-436A-B728-EF4CC32E0C81}.Release|x86.ActiveCfg = Release|Win32
+ {CEDC70AD-DC0C-436A-B728-EF4CC32E0C81}.Release|x86.Build.0 = Release|Win32
+ EndGlobalSection
+ GlobalSection(SolutionProperties) = preSolution
+ HideSolutionNode = FALSE
+ EndGlobalSection
+ GlobalSection(ExtensibilityGlobals) = postSolution
+ SolutionGuid = {139BCBC1-22A6-49BB-9FA2-41ED0A385CE9}
+ EndGlobalSection
+EndGlobal
diff --git a/bits 4/bits 4.cpp b/bits 4/bits 4.cpp
new file mode 100644
index 0000000..a159f1d
--- /dev/null
+++ b/bits 4/bits 4.cpp
@@ -0,0 +1,77 @@
+#include <iostream>
+#include <fstream>
+#include <string>
+
+using namespace std;
+
+int main() {
+ char fileName[260];
+ cin.getline(fileName, 260);
+
+ if (strchr(fileName, '*') || strchr(fileName, '"') || strchr(fileName, '<') ||
+ strchr(fileName, '>') || strchr(fileName, '?') || strchr(fileName, '|') ||
+ strchr(fileName + 2, ':') || (fileName[0] == ':')) {
+ cout << "Invalid path" << endl;
+ return 1;
+ }
+
+ if (fileName[1] == ':' && (!isalpha(fileName[0]) || fileName[2] != '\\')) {
+ cout << "Invalid path" << endl;
+ return 1;
+ }
+
+ if (strrchr(fileName, '.') && (strrchr(fileName, '.') > strrchr(fileName, '\\')) && (strrchr(fileName, '.') > strrchr(fileName, '/'))) {
+ char* ext = strrchr(fileName, '.') + 1;
+
+ if (strlen(ext) != 3) {
+ cout << "Invalid path" << endl;
+ return 1;
+ }
+
+ ext[0] = tolower(ext[0]);
+ ext[1] = tolower(ext[1]);
+ ext[2] = tolower(ext[2]);
+
+ if (strncmp(ext, "txt", 3) != 0) {
+ cout << "Invalid path" << endl;
+ return 1;
+ }
+ }
+ else {
+ strcat_s(fileName, 260, ".txt");
+ }
+
+ ifstream fin;
+ fin.open(fileName, ios_base::binary);
+
+ if (!fin.is_open()) {
+ cout << "Can't open file" << endl;
+ return 1;
+ }
+
+ fin.seekg(0, ios_base::_Seekend);
+ size_t size = fin.tellg();
+ fin.seekg(0, ios_base::_Seekbeg);
+
+ char* buf = new char[size];
+ fin.read(buf, size);
+ fin.close();
+
+ char str[64];
+ cin.getline(str, 64);
+
+ char* found = buf - 1;
+ uint16_t cnt = -1;
+
+ do {
+ ++cnt;
+ ++found;
+ found = strstr(found, str);
+ } while (found);
+
+ delete[] buf;
+ cout << cnt << " occurrences found" << endl;
+ cin.get();
+
+ return 0;
+}
diff --git a/bits 4/bits 4.vcxproj b/bits 4/bits 4.vcxproj
new file mode 100644
index 0000000..7fc1486
--- /dev/null
+++ b/bits 4/bits 4.vcxproj
@@ -0,0 +1,135 @@
+<?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>{cedc70ad-dc0c-436a-b728-ef4cc32e0c81}</ProjectGuid>
+ <RootNamespace>bits4</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="bits 4.cpp" />
+ </ItemGroup>
+ <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
+ <ImportGroup Label="ExtensionTargets">
+ </ImportGroup>
+</Project>
\ No newline at end of file
diff --git a/bits 4/bits 4.vcxproj.filters b/bits 4/bits 4.vcxproj.filters
new file mode 100644
index 0000000..8e0811d
--- /dev/null
+++ b/bits 4/bits 4.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="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="bits 4.cpp">
+ <Filter>Исходные файлы</Filter>
+ </ClCompile>
+ </ItemGroup>
+</Project>
\ No newline at end of file