diff --git a/.gitignore b/.gitignore
index 63d2f37..91c011c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -45,3 +45,56 @@ 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
+sub/.vs/sub/v16/Browse.VC.db
+sub/.vs/sub/v16/Browse.VC.db-shm
+sub/.vs/sub/v16/Browse.VC.db-wal
+sub/.vs/sub/v16/Browse.VC.opendb
+sub/.vs/sub/v16/Solution.VC.db
+sub/.vs/sub/v16/Solution.VC.db-shm
+sub/.vs/sub/v16/Solution.VC.db-wal
+sub/.vs/sub/v16/ipch/AutoPCH/664a463277dcf22c/SUB.ipch
+sub/.vs/sub/v16/TestStore/0/000.testlog
+sub/.vs/sub/v16/TestStore/0/testlog.manifest
+sub/Debug/sub.dll
+sub/Debug/sub.exp
+sub/Debug/sub.ilk
+sub/Debug/sub.lib
+sub/Debug/sub.pdb
+sub/Debug/UnitTest1.dll
+sub/Debug/UnitTest1.exp
+sub/Debug/UnitTest1.ilk
+sub/Debug/UnitTest1.lib
+sub/Debug/UnitTest1.pdb
+sub/sub/Debug/sub.Build.CppClean.log
+sub/sub/Debug/sub.dll.recipe
+sub/sub/Debug/sub.log
+sub/sub/Debug/sub.obj
+sub/sub/Debug/sub.vcxproj.FileListAbsolute.txt
+sub/sub/Debug/vc142.idb
+sub/sub/Debug/vc142.pdb
+sub/sub/Debug/sub.tlog/CL.command.1.tlog
+sub/sub/Debug/sub.tlog/CL.read.1.tlog
+sub/sub/Debug/sub.tlog/CL.write.1.tlog
+sub/sub/Debug/sub.tlog/link.command.1.tlog
+sub/sub/Debug/sub.tlog/link.read.1.tlog
+sub/sub/Debug/sub.tlog/link.write.1.tlog
+sub/sub/Debug/sub.tlog/sub.lastbuildstate
+sub/sub/Debug/sub.tlog/sub.write.1u.tlog
+sub/TestResults/1340eb68-14ba-4383-950c-3cfc4e6fa9a4/林_MI-1 2021-01-12 08_13_32.coverage
+sub/UnitTest1/Debug/pch.obj
+sub/UnitTest1/Debug/UnitTest1.Build.CppClean.log
+sub/UnitTest1/Debug/UnitTest1.dll.recipe
+sub/UnitTest1/Debug/UnitTest1.log
+sub/UnitTest1/Debug/UnitTest1.obj
+sub/UnitTest1/Debug/UnitTest1.pch
+sub/UnitTest1/Debug/UnitTest1.vcxproj.FileListAbsolute.txt
+sub/UnitTest1/Debug/vc142.idb
+sub/UnitTest1/Debug/vc142.pdb
+sub/UnitTest1/Debug/UnitTest1.tlog/CL.command.1.tlog
+sub/UnitTest1/Debug/UnitTest1.tlog/CL.read.1.tlog
+sub/UnitTest1/Debug/UnitTest1.tlog/CL.write.1.tlog
+sub/UnitTest1/Debug/UnitTest1.tlog/link.command.1.tlog
+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
diff --git a/add/.vs/add/v16/.suo b/add/.vs/add/v16/.suo
index ab591c7..93218fc 100644
Binary files a/add/.vs/add/v16/.suo and b/add/.vs/add/v16/.suo differ
diff --git a/sub/.vs/sub/v16/.suo b/sub/.vs/sub/v16/.suo
index 6df4bda..c69082d 100644
Binary files a/sub/.vs/sub/v16/.suo and b/sub/.vs/sub/v16/.suo differ