diff --git a/k&r/04-funcs-and-prog-struct/04-calc.c b/k&r/04-funcs-and-prog-struct/04-calc/04-calc.c
similarity index 100%
rename from k&r/04-funcs-and-prog-struct/04-calc.c
rename to k&r/04-funcs-and-prog-struct/04-calc/04-calc.c
diff --git a/k&r/04-funcs-and-prog-struct/04-glob-stack.h b/k&r/04-funcs-and-prog-struct/04-calc/04-glob-stack.h
similarity index 100%
rename from k&r/04-funcs-and-prog-struct/04-glob-stack.h
rename to k&r/04-funcs-and-prog-struct/04-calc/04-glob-stack.h
diff --git a/k&r/04-funcs-and-prog-struct/04-tokens.h b/k&r/04-funcs-and-prog-struct/04-calc/04-tokens.h
similarity index 100%
rename from k&r/04-funcs-and-prog-struct/04-tokens.h
rename to k&r/04-funcs-and-prog-struct/04-calc/04-tokens.h