diff --git a/.gitignore b/.gitignore
index 91c011c..a7595a5 100644
--- a/.gitignore
+++ b/.gitignore
@@ -98,3 +98,56 @@ sub/UnitTest1/Debug/UnitTest1.tlog/link.read.1.tlog
 sub/UnitTest1/Debug/UnitTest1.tlog/link.write.1.tlog
 sub/UnitTest1/Debug/UnitTest1.tlog/UnitTest1.lastbuildstate
 sub/UnitTest1/Debug/UnitTest1.tlog/UnitTest1.write.1u.tlog
+mul/.vs/mul/v16/Browse.VC.db
+mul/.vs/mul/v16/Browse.VC.db-shm
+mul/.vs/mul/v16/Browse.VC.db-wal
+mul/.vs/mul/v16/Browse.VC.opendb
+mul/.vs/mul/v16/Solution.VC.db
+mul/.vs/mul/v16/Solution.VC.db-shm
+mul/.vs/mul/v16/Solution.VC.db-wal
+mul/.vs/mul/v16/ipch/dd8bd115bf9b6900.ipch
+mul/.vs/mul/v16/TestStore/0/000.testlog
+mul/.vs/mul/v16/TestStore/0/testlog.manifest
+mul/Debug/mul.dll
+mul/Debug/mul.exp
+mul/Debug/mul.ilk
+mul/Debug/mul.lib
+mul/Debug/mul.pdb
+mul/Debug/UnitTest1.dll
+mul/Debug/UnitTest1.exp
+mul/Debug/UnitTest1.ilk
+mul/Debug/UnitTest1.lib
+mul/Debug/UnitTest1.pdb
+mul/mul/Debug/mul.Build.CppClean.log
+mul/mul/Debug/mul.dll.recipe
+mul/mul/Debug/mul.log
+mul/mul/Debug/mul.obj
+mul/mul/Debug/mul.vcxproj.FileListAbsolute.txt
+mul/mul/Debug/vc142.idb
+mul/mul/Debug/vc142.pdb
+mul/mul/Debug/mul.tlog/CL.command.1.tlog
+mul/mul/Debug/mul.tlog/CL.read.1.tlog
+mul/mul/Debug/mul.tlog/CL.write.1.tlog
+mul/mul/Debug/mul.tlog/link.command.1.tlog
+mul/mul/Debug/mul.tlog/link.read.1.tlog
+mul/mul/Debug/mul.tlog/link.write.1.tlog
+mul/mul/Debug/mul.tlog/mul.lastbuildstate
+mul/mul/Debug/mul.tlog/mul.write.1u.tlog
+mul/TestResults/5b6732c8-82a8-4bce-adb7-f07e5a2226e7/林_MI-1 2021-01-12 08_17_05.coverage
+mul/UnitTest1/Debug/pch.obj
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+mul/UnitTest1/Debug/UnitTest1.dll.recipe
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+mul/UnitTest1/Debug/UnitTest1.obj
+mul/UnitTest1/Debug/UnitTest1.pch
+mul/UnitTest1/Debug/UnitTest1.vcxproj.FileListAbsolute.txt
+mul/UnitTest1/Debug/vc142.idb
+mul/UnitTest1/Debug/vc142.pdb
+mul/UnitTest1/Debug/UnitTest1.tlog/CL.command.1.tlog
+mul/UnitTest1/Debug/UnitTest1.tlog/CL.read.1.tlog
+mul/UnitTest1/Debug/UnitTest1.tlog/CL.write.1.tlog
+mul/UnitTest1/Debug/UnitTest1.tlog/link.command.1.tlog
+mul/UnitTest1/Debug/UnitTest1.tlog/link.read.1.tlog
+mul/UnitTest1/Debug/UnitTest1.tlog/link.write.1.tlog
+mul/UnitTest1/Debug/UnitTest1.tlog/UnitTest1.lastbuildstate
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diff --git a/mul/.vs/mul/v16/.suo b/mul/.vs/mul/v16/.suo
index 72f7efe..cfc82b1 100644
Binary files a/mul/.vs/mul/v16/.suo and b/mul/.vs/mul/v16/.suo differ
diff --git a/sub/.vs/sub/v16/.suo b/sub/.vs/sub/v16/.suo
index c69082d..549cb6f 100644
Binary files a/sub/.vs/sub/v16/.suo and b/sub/.vs/sub/v16/.suo differ