分支19完成

.gitignore

@@ -162,3 +162,7 @@ Alogrithm/.vs/Alogrithm/v16/ipch/AutoPCH/314d19c9f4445d9e/18_PLUSONE.ipch
 Alogrithm/.vs/Alogrithm/v16/ipch/AutoPCH/a71bf0a3ca35e643/18_PLUSONE.ipch
 Alogrithm/.vs/Alogrithm/v16/TestStore/0/004.testlog
 Alogrithm/Alogrithm/Debug/18_PlusOne.obj
+Alogrithm/.vs/Alogrithm/v16/ipch/AutoPCH/1a1702b241b62b26/19_MYSQRT.ipch
+Alogrithm/.vs/Alogrithm/v16/TestStore/0/005.testlog
+Alogrithm/Alogrithm/Debug/19_MySqrt.obj
+Alogrithm/UnitTest/Debug/UnitTest.tlog/link.16016.delete.1.tlog

Alogrithm/Alogrithm/Alogrithm.vcxproj

@@ -149,6 +149,7 @@
     <ClCompile Include="src\15_WordPattern.cpp" />
     <ClCompile Include="src\16_ReverseBits.cpp" />
     <ClCompile Include="src\18_PlusOne.cpp" />
+    <ClCompile Include="src\19_MySqrt.cpp" />
     <ClCompile Include="src\1_ContainsNearbyDuplicate.cpp" />
     <ClCompile Include="src\2_ExcelSheetColumnTitle.cpp" />
     <ClCompile Include="src\3_bool IsUgly.cpp" />
@@ -169,6 +170,7 @@
     <ClInclude Include="include\15_WordPattern.h" />
     <ClInclude Include="include\16_ReverseBits.h" />
     <ClInclude Include="include\18_PlusOne.h" />
+    <ClInclude Include="include\19_MySqrt.h" />
     <ClInclude Include="include\1_ContainsNearbyDuplicate.h" />
     <ClInclude Include="include\2_ExcelSheetColumnTitle.h" />
     <ClInclude Include="include\3_bool IsUgly.h" />
@@ -188,6 +190,7 @@
     <None Include="config\15_WordPattern.ini" />
     <None Include="config\16_ReverseBits.ini" />
     <None Include="config\18_PlusOne.ini" />
+    <None Include="config\19_MySqrt.ini" />
     <None Include="config\1_ContainsNearbyDuplicate.ini" />
     <None Include="config\2_ExcelSheetColumnTiTle.ini" />
     <None Include="config\3_bool IsUgly.ini" />

Alogrithm/Alogrithm/Alogrithm.vcxproj.filters

@@ -78,6 +78,9 @@
     <ClCompile Include="src\18_PlusOne.cpp">
       <Filter>源文件\src</Filter>
     </ClCompile>
+    <ClCompile Include="src\19_MySqrt.cpp">
+      <Filter>源文件\src</Filter>
+    </ClCompile>
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="include\2_ExcelSheetColumnTitle.h">
@@ -131,6 +134,9 @@
     <ClInclude Include="include\18_PlusOne.h">
       <Filter>头文件\include</Filter>
     </ClInclude>
+    <ClInclude Include="include\19_MySqrt.h">
+      <Filter>头文件\include</Filter>
+    </ClInclude>
   </ItemGroup>
   <ItemGroup>
     <None Include="config\3_bool IsUgly.ini">
@@ -184,5 +190,8 @@
     <None Include="config\18_PlusOne.ini">
       <Filter>资源文件\config</Filter>
     </None>
+    <None Include="config\19_MySqrt.ini">
+      <Filter>资源文件\config</Filter>
+    </None>
   </ItemGroup>
 </Project>

Alogrithm/Alogrithm/config/19_MySqrt.ini

@@ -0,0 +1,24 @@
+[Test1]
+Input=4
+Output=2
+[Test2]
+Input=8
+Output=2
+[Test3]
+Input=0
+Output=0
+[Test4]
+Input=1
+Output=1
+[Test5]
+Input=2
+Output=1
+[Test6]
+Input=66564
+Output=258
+[Test7]
+Input=2147395600
+Output=46340
+[Test8]
+Input=2147483647
+Output=46340

Alogrithm/Alogrithm/include/19_MySqrt.h

@@ -0,0 +1,2 @@
+#pragma once
+int MySqrt(int x);

Alogrithm/Alogrithm/src/19_MySqrt.cpp

@@ -0,0 +1,25 @@
+#include "../include/19_MySqrt.h"
+//题目：实现 int sqrt(int x) 函数，计算并返回 x 的平方根，其中 x 是非负整数。
+//      由于返回类型是整数，结果只保留整数的部分，小数部分将被舍去。
+//思路：使用二分法进行查找，先确定上下限和中间值，对中间值进行平方，然后和x作比较
+//		如果中间值的平方比x小，low加一缩小搜索范围；如果相等则刚好找到；否则high减一缩小搜索范围
+int MySqrt(int x) {
+	if (x < 2) {//如果入参为0,1，直接返回原数
+		return x;
+	}//因为一个数的平方一定大于等于这个数的二倍（0,1除外），所以上限缩小为x/2
+	int low = 1, high = x / 2,mid = 0;		//定义下限，上限，中间值
+	while (low <= high)						//循环终止条件，当左界限比右界限大时，跳出循环
+	{
+		mid = (low + high) / 2;				//取low和high的中间值mid
+		if (mid == x / mid) {				//判断mid*nid和x是否相等，因为考虑到乘法溢出，这里写为mid == x/mid
+			return mid;						//相等说明找到，直接返回			
+		}
+		else if ( mid < x / mid) {			//如果mid*mid小于x
+			low = mid + 1;					//下限上移
+		}
+		else {								//如果mid*mid大于x
+			high = mid - 1;					//上限下移
+		}
+	}										//循环结束时，low>high，也就是说 low平方>x>high平方，这里小数部分省去
+	return high;							//所以返回的high就是需要的值
+}

Alogrithm/Alogrithm/src/main.cpp

@@ -1,8 +1,8 @@
 #include<stdio.h>
-
+#include "../include/19_MySqrt.h"
 
 int main()
 {
-	
+	printf("%d\n", MySqrt(9));
 	
 }

Alogrithm/UnitTest/UnitTest.cpp

@@ -19,7 +19,7 @@ using namespace Microsoft::VisualStudio::CppUnitTestFramework;
 #define FileName_15 "../Alogrithm/config/15_WordPattern.ini"
 #define FileName_16 "../Alogrithm/config/16_ReverseBits.ini"
 #define FileName_18 "../Alogrithm/config/18_PlusOne.ini"
-
+#define FileName_19 "../Alogrithm/config/19_MySqrt.ini"
 
 namespace UnitTest
 {
@@ -333,4 +333,19 @@ namespace UnitTest
 			}
 		}
 	};
+	TEST_CLASS(UnitTest_19)
+	{
+		TEST_METHOD(TestMethode1)
+		{
+			char Section_Name[100][10] = { 0 };
+			int  Section_Count = CalcCount(100, Section_Name, FileName_19);
+			CString input,output;
+			for (int i = 0; i < Section_Count; i++) {
+				GetPrivateProfileString(Section_Name[i], "Input", " ", input.GetBuffer(100), 100, FileName_19);
+				GetPrivateProfileString(Section_Name[i], "Output", " ", output.GetBuffer(100), 100, FileName_19);
+				int nReal = MySqrt(_ttoi(input));
+				Assert::AreEqual(nReal, _ttoi(output));
+			}
+		}
+	};
 }

Alogrithm/UnitTest/UnitTest.vcxproj

@@ -103,7 +103,7 @@
       <SubSystem>Windows</SubSystem>
       <AdditionalLibraryDirectories>$(VCInstallDir)UnitTest\lib;%(AdditionalLibraryDirectories)</AdditionalLibraryDirectories>
       <GenerateDebugInformation>DebugFull</GenerateDebugInformation>
-      <AdditionalDependencies>../Alogrithm/Debug/1_ContainsNearbyDuplicate.obj;../Alogrithm/Debug/2_ExcelSheetColumnTitle.obj;../Alogrithm/Debug/3_bool IsUgly.obj;../Alogrithm/Debug/4_IsPalindrome.obj;../Alogrithm/Debug/5_MinDepth.obj;../Alogrithm/Debug/6_ContainsDuplicate.obj;../Alogrithm/Debug/7_MaxDepth.obj;../Alogrithm/Debug/8_HammingWeight.obj;../Alogrithm/Debug/9_AddBinary.obj;../Alogrithm/Debug/10_BinaryTreePaths.obj;../Alogrithm/Debug/11_CanWinNim.obj;../Alogrithm/Debug/12_IsValid.obj;../Alogrithm/Debug/13_MyAtoi.obj;../Alogrithm/Debug/14_SingleNumber.obj;../Alogrithm/Debug/15_WordPattern.obj;../Alogrithm/Debug/16_ReverseBits.obj;../Alogrithm/Debug/18_PlusOne.obj;%(AdditionalDependencies)</AdditionalDependencies>
+      <AdditionalDependencies>../Alogrithm/Debug/1_ContainsNearbyDuplicate.obj;../Alogrithm/Debug/2_ExcelSheetColumnTitle.obj;../Alogrithm/Debug/3_bool IsUgly.obj;../Alogrithm/Debug/4_IsPalindrome.obj;../Alogrithm/Debug/5_MinDepth.obj;../Alogrithm/Debug/6_ContainsDuplicate.obj;../Alogrithm/Debug/7_MaxDepth.obj;../Alogrithm/Debug/8_HammingWeight.obj;../Alogrithm/Debug/9_AddBinary.obj;../Alogrithm/Debug/10_BinaryTreePaths.obj;../Alogrithm/Debug/11_CanWinNim.obj;../Alogrithm/Debug/12_IsValid.obj;../Alogrithm/Debug/13_MyAtoi.obj;../Alogrithm/Debug/14_SingleNumber.obj;../Alogrithm/Debug/15_WordPattern.obj;../Alogrithm/Debug/16_ReverseBits.obj;../Alogrithm/Debug/18_PlusOne.obj;../Alogrithm/Debug/19_MySqrt.obj;%(AdditionalDependencies)</AdditionalDependencies>
     </Link>
   </ItemDefinitionGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">

Alogrithm/UnitTest/pch.h

@@ -30,6 +30,7 @@
 #include"../Alogrithm/include/15_WordPattern.h"
 #include"../Alogrithm/include/16_ReverseBits.h"
 #include"../Alogrithm/include/18_PlusOne.h"
+#include"../Alogrithm/include/19_MySqrt.h"
 
 
 int CalcCount(int n, char(*str)[10],const char *FileName);