diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..63d2f37
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,47 @@
+add/.vs/add/v16/Browse.VC.db
+add/.vs/add/v16/Browse.VC.db-shm
+add/.vs/add/v16/Browse.VC.db-wal
+add/.vs/add/v16/Browse.VC.opendb
+add/.vs/add/v16/Solution.VC.db
+add/.vs/add/v16/Solution.VC.db-shm
+add/.vs/add/v16/Solution.VC.db-wal
+add/.vs/add/v16/ipch/c2b2a0b22c38aed3.ipch
+add/.vs/add/v16/TestStore/0/000.testlog
+add/.vs/add/v16/TestStore/0/testlog.manifest
+add/add/Debug/add.Build.CppClean.log
+add/add/Debug/add.idb
+add/add/Debug/add.lib.recipe
+add/add/Debug/add.log
+add/add/Debug/add.obj
+add/add/Debug/add.pdb
+add/add/Debug/add.vcxproj.FileListAbsolute.txt
+add/add/Debug/add.tlog/add.lastbuildstate
+add/add/Debug/add.tlog/CL.command.1.tlog
+add/add/Debug/add.tlog/CL.read.1.tlog
+add/add/Debug/add.tlog/CL.write.1.tlog
+add/add/Debug/add.tlog/Lib.command.1.tlog
+add/add/Debug/add.tlog/Lib-link.read.1.tlog
+add/add/Debug/add.tlog/Lib-link.write.1.tlog
+add/Debug/add.lib
+add/Debug/add.pdb
+add/Debug/UnitTest1.dll
+add/Debug/UnitTest1.exp
+add/Debug/UnitTest1.ilk
+add/Debug/UnitTest1.lib
+add/Debug/UnitTest1.pdb
+add/TestResults/4e7fb9c6-3065-44a7-812f-e104ba88cd3f/林_MI-1 2021-01-12 08_06_10.coverage
+add/UnitTest1/Debug/pch.obj
+add/UnitTest1/Debug/UnitTest1.dll.recipe
+add/UnitTest1/Debug/UnitTest1.log
+add/UnitTest1/Debug/UnitTest1.obj
+add/UnitTest1/Debug/UnitTest1.pch
+add/UnitTest1/Debug/vc142.idb
+add/UnitTest1/Debug/vc142.pdb
+add/UnitTest1/Debug/UnitTest1.tlog/CL.command.1.tlog
+add/UnitTest1/Debug/UnitTest1.tlog/CL.read.1.tlog
+add/UnitTest1/Debug/UnitTest1.tlog/CL.write.1.tlog
+add/UnitTest1/Debug/UnitTest1.tlog/link.command.1.tlog
+add/UnitTest1/Debug/UnitTest1.tlog/link.read.1.tlog
+add/UnitTest1/Debug/UnitTest1.tlog/link.write.1.tlog
+add/UnitTest1/Debug/UnitTest1.tlog/UnitTest1.lastbuildstate
+add/UnitTest1/Debug/UnitTest1.tlog/UnitTest1.write.1u.tlog
diff --git a/add/.vs/add/v16/.suo b/add/.vs/add/v16/.suo
index 27f989d..ab591c7 100644
Binary files a/add/.vs/add/v16/.suo and b/add/.vs/add/v16/.suo differ