Initial commit for question 56(1)

56_01_NumbersAppearOnce/56_01_NumbersAppearOnce.vcxproj

@@ -0,0 +1,150 @@
+<?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>{7AF20C33-D3E9-4DB1-8BCE-F4FA7CBF714E}</ProjectGuid>
+    <Keyword>Win32Proj</Keyword>
+    <RootNamespace>My56_01_NumbersAppearOnce</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>
+    </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>
+    </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>
+    </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>
+    </ClCompile>
+    <Link>
+      <SubSystem>Console</SubSystem>
+      <EnableCOMDATFolding>true</EnableCOMDATFolding>
+      <OptimizeReferences>true</OptimizeReferences>
+      <GenerateDebugInformation>true</GenerateDebugInformation>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemGroup>
+    <ClCompile Include="NumbersAppearOnce.cpp" />
+  </ItemGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
+  <ImportGroup Label="ExtensionTargets">
+  </ImportGroup>
+</Project>

56_01_NumbersAppearOnce/56_01_NumbersAppearOnce.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="NumbersAppearOnce.cpp">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+  </ItemGroup>
+</Project>

56_01_NumbersAppearOnce/NumbersAppearOnce.cpp

@@ -0,0 +1,98 @@
+//==================================================================
+// 《剑指Offer——名企面试官精讲典型编程题》代码
+// 作者：何海涛
+//==================================================================
+
+// 面试题56（一）：数组中只出现一次的两个数字
+// 题目：一个整型数组里除了两个数字之外，其他的数字都出现了两次。请写程序
+// 找出这两个只出现一次的数字。要求时间复杂度是O(n)，空间复杂度是O(1)。
+
+#include <cstdio>
+
+unsigned int FindFirstBitIs1(int num);
+bool IsBit1(int num, unsigned int indexBit);
+
+void FindNumsAppearOnce(int data[], int length, int* num1, int* num2)
+{
+    if(data == nullptr || length < 2)
+        return;
+
+    int resultExclusiveOR = 0;
+    for(int i = 0; i < length; ++i)
+        resultExclusiveOR ^= data[i];
+
+    unsigned int indexOf1 = FindFirstBitIs1(resultExclusiveOR);
+
+    *num1 = *num2 = 0;
+    for(int j = 0; j < length; ++j)
+    {
+        if(IsBit1(data[j], indexOf1))
+            *num1 ^= data[j];
+        else
+            *num2 ^= data[j];
+    }
+}
+
+// 找到num从右边数起第一个是1的位
+unsigned int FindFirstBitIs1(int num)
+{
+    int indexBit = 0;
+    while(((num & 1) == 0) && (indexBit < 8 * sizeof(int)))
+    {
+        num = num >> 1;
+        ++indexBit;
+    }
+
+    return indexBit;
+}
+
+// 判断数字num的第indexBit位是不是1
+bool IsBit1(int num, unsigned int indexBit)
+{
+    num = num >> indexBit;
+    return (num & 1);
+}
+
+// ====================测试代码====================
+void Test(const char* testName, int data[], int length, int expected1, int expected2)
+{
+    if(testName != nullptr)
+        printf("%s begins: ", testName);
+
+    int result1, result2;
+    FindNumsAppearOnce(data, length, &result1, &result2);
+
+    if((expected1 == result1 && expected2 == result2) ||
+        (expected2 == result1 && expected1 == result2))
+        printf("Passed.\n\n");
+    else
+        printf("Failed.\n\n");
+}
+
+void Test1()
+{
+    int data[] = { 2, 4, 3, 6, 3, 2, 5, 5 };
+    Test("Test1", data, sizeof(data) / sizeof(int), 4, 6);
+}
+
+void Test2()
+{
+    int data[] = { 4, 6 };
+    Test("Test2", data, sizeof(data) / sizeof(int), 4, 6);
+}
+
+void Test3()
+{
+    int data[] = { 4, 6, 1, 1, 1, 1 };
+    Test("Test3", data, sizeof(data) / sizeof(int), 4, 6);
+}
+
+int main(int argc, char* argv[])
+{
+    Test1();
+    Test2();
+    Test3();
+
+    return 0;
+}
+

CodingInterviewChinese2.sln

@@ -134,6 +134,8 @@ Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "55_01_TreeDepth", "55_01_Tr
 EndProject
 Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "55_02_BalancedBinaryTree", "55_02_BalancedBinaryTree\55_02_BalancedBinaryTree.vcxproj", "{6734F70E-193F-4E6B-BB09-A6CB4881193D}"
 EndProject
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "56_01_NumbersAppearOnce", "56_01_NumbersAppearOnce\56_01_NumbersAppearOnce.vcxproj", "{7AF20C33-D3E9-4DB1-8BCE-F4FA7CBF714E}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -786,6 +788,16 @@ Global
 		{6734F70E-193F-4E6B-BB09-A6CB4881193D}.Release|x64.Build.0 = Release|x64
 		{6734F70E-193F-4E6B-BB09-A6CB4881193D}.Release|x86.ActiveCfg = Release|Win32
 		{6734F70E-193F-4E6B-BB09-A6CB4881193D}.Release|x86.Build.0 = Release|Win32
+		{7AF20C33-D3E9-4DB1-8BCE-F4FA7CBF714E}.Debug|Any CPU.ActiveCfg = Debug|Win32
+		{7AF20C33-D3E9-4DB1-8BCE-F4FA7CBF714E}.Debug|x64.ActiveCfg = Debug|x64
+		{7AF20C33-D3E9-4DB1-8BCE-F4FA7CBF714E}.Debug|x64.Build.0 = Debug|x64
+		{7AF20C33-D3E9-4DB1-8BCE-F4FA7CBF714E}.Debug|x86.ActiveCfg = Debug|Win32
+		{7AF20C33-D3E9-4DB1-8BCE-F4FA7CBF714E}.Debug|x86.Build.0 = Debug|Win32
+		{7AF20C33-D3E9-4DB1-8BCE-F4FA7CBF714E}.Release|Any CPU.ActiveCfg = Release|Win32
+		{7AF20C33-D3E9-4DB1-8BCE-F4FA7CBF714E}.Release|x64.ActiveCfg = Release|x64
+		{7AF20C33-D3E9-4DB1-8BCE-F4FA7CBF714E}.Release|x64.Build.0 = Release|x64
+		{7AF20C33-D3E9-4DB1-8BCE-F4FA7CBF714E}.Release|x86.ActiveCfg = Release|Win32
+		{7AF20C33-D3E9-4DB1-8BCE-F4FA7CBF714E}.Release|x86.Build.0 = Release|Win32
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE