Revert "Deleted manual input function"

This reverts commit fa123e0fb0.

.gitignore

@@ -0,0 +1,34 @@
+*.vscode
+# Prerequisites
+*.d
+CMakeLists.txt
+.idea
+# Compiled Object files
+*.slo
+*.lo
+*.o
+*.obj
+
+# Precompiled Headers
+*.gch
+*.pch
+
+# Compiled Dynamic libraries
+*.so
+*.dylib
+*.dll
+
+# Fortran module files
+*.mod
+*.smod
+
+# Compiled Static libraries
+*.lai
+*.la
+*.a
+*.lib
+
+# Executables
+*.exe
+*.out
+*.app