added files.

.gitignore

@@ -0,0 +1,34 @@
+# CMake build directories
+build/
+bin/
+lib/
+out/
+CMakeSettings.json
+
+# Visual Studio files
+.vs/
+*.user
+*.suo
+*.userosscache
+*.sln.docstates
+*.opensdf
+*.sdf
+*.VC.db
+*.VC.opendb
+
+# Gradle and JVM files
+.gradle/
+**/build/
+*.class
+*.log
+
+# Eclipse / IDE metadata
+.settings/
+.classpath
+.project
+
+# Temporary / backup files
+*.tmp
+*.bak
+*.swp
+*~