diff --git a/.gitignore b/.gitignore
index a7595a5..3dc27a3 100644
--- a/.gitignore
+++ b/.gitignore
@@ -151,3 +151,57 @@ 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
 mul/UnitTest1/Debug/UnitTest1.tlog/UnitTest1.write.1u.tlog
+dev/.vs/dev/v16/Browse.VC.db
+dev/.vs/dev/v16/Browse.VC.db-shm
+dev/.vs/dev/v16/Browse.VC.db-wal
+dev/.vs/dev/v16/Browse.VC.opendb
+dev/.vs/dev/v16/Solution.VC.db
+dev/.vs/dev/v16/Solution.VC.db-shm
+dev/.vs/dev/v16/Solution.VC.db-wal
+dev/.vs/dev/v16/ipch/ed679123ab1cc7fb.ipch
+dev/.vs/dev/v16/ipch/AutoPCH/5dedd27401893e12/MAIN.ipch
+dev/.vs/dev/v16/ipch/AutoPCH/a7a490ec8f4f110f/OPERA_API.ipch
+dev/.vs/dev/v16/TestStore/0/000.testlog
+dev/.vs/dev/v16/TestStore/0/testlog.manifest
+dev/Debug/dev.exe
+dev/Debug/dev.ilk
+dev/Debug/dev.pdb
+dev/Debug/UnitTest1.dll
+dev/Debug/UnitTest1.exp
+dev/Debug/UnitTest1.ilk
+dev/Debug/UnitTest1.lib
+dev/Debug/UnitTest1.pdb
+dev/dev/Debug/dev.Build.CppClean.log
+dev/dev/Debug/dev.exe.recipe
+dev/dev/Debug/dev.log
+dev/dev/Debug/dev.obj
+dev/dev/Debug/dev.vcxproj.FileListAbsolute.txt
+dev/dev/Debug/main.obj
+dev/dev/Debug/Opera_api.obj
+dev/dev/Debug/vc142.idb
+dev/dev/Debug/vc142.pdb
+dev/dev/Debug/dev.tlog/CL.command.1.tlog
+dev/dev/Debug/dev.tlog/CL.read.1.tlog
+dev/dev/Debug/dev.tlog/CL.write.1.tlog
+dev/dev/Debug/dev.tlog/dev.lastbuildstate
+dev/dev/Debug/dev.tlog/link.command.1.tlog
+dev/dev/Debug/dev.tlog/link.read.1.tlog
+dev/dev/Debug/dev.tlog/link.write.1.tlog
+dev/TestResults/dc641034-182f-4352-a7d3-402a04a65ce6/鏋梍MI-1 2021-01-12 08_22_54.coverage
+dev/UnitTest1/Debug/pch.obj
+dev/UnitTest1/Debug/UnitTest1.Build.CppClean.log
+dev/UnitTest1/Debug/UnitTest1.dll.recipe
+dev/UnitTest1/Debug/UnitTest1.log
+dev/UnitTest1/Debug/UnitTest1.obj
+dev/UnitTest1/Debug/UnitTest1.pch
+dev/UnitTest1/Debug/UnitTest1.vcxproj.FileListAbsolute.txt
+dev/UnitTest1/Debug/vc142.idb
+dev/UnitTest1/Debug/vc142.pdb
+dev/UnitTest1/Debug/UnitTest1.tlog/CL.command.1.tlog
+dev/UnitTest1/Debug/UnitTest1.tlog/CL.read.1.tlog
+dev/UnitTest1/Debug/UnitTest1.tlog/CL.write.1.tlog
+dev/UnitTest1/Debug/UnitTest1.tlog/link.command.1.tlog
+dev/UnitTest1/Debug/UnitTest1.tlog/link.read.1.tlog
+dev/UnitTest1/Debug/UnitTest1.tlog/link.write.1.tlog
+dev/UnitTest1/Debug/UnitTest1.tlog/UnitTest1.lastbuildstate
+dev/UnitTest1/Debug/UnitTest1.tlog/UnitTest1.write.1u.tlog
diff --git a/dev/.vs/dev/v16/.suo b/dev/.vs/dev/v16/.suo
index 0a2b0e7..40f2bef 100644
Binary files a/dev/.vs/dev/v16/.suo and b/dev/.vs/dev/v16/.suo differ
diff --git a/dev/dev/main.cpp b/dev/dev/main.cpp
index 2e6c127..c90bcd3 100644
--- a/dev/dev/main.cpp
+++ b/dev/dev/main.cpp
@@ -3,7 +3,7 @@
 #include "dev.h"
 int main()
 {
-	int a = 2147483647, b = 2;
+	int a = 2147483647, b = 3;
 	add_api(a, b);//调用 加法接口add_api
 	sub_api(a, b);//调用 减法接口sub_api
 	mul_api(a, b);	//调用 乘法接口mul_api
diff --git a/mul/.vs/mul/v16/.suo b/mul/.vs/mul/v16/.suo
index cfc82b1..11edf91 100644
Binary files a/mul/.vs/mul/v16/.suo and b/mul/.vs/mul/v16/.suo differ