diff --git a/d01/ex04/Makefile b/d01/ex04/Makefile
new file mode 100644
index 0000000..81dd985
--- /dev/null
+++ b/d01/ex04/Makefile
@@ -0,0 +1,61 @@
+# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - #
+#                 .     name = value      .  name is case sensitive   #
+#    VARIABLES    . or  name = value \    .  use VPATH only for .c    #
+#                 .            value      .                  or .cpp  #
+# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - #
+
+NAME      = sed
+
+CC        = clang++
+CFLAGS    = -Wall -Wextra -Werror $(INCLUDES) -std=c++98 -g3
+
+VPATH     = $(D_SRCS)
+
+LIBS      =
+
+INCLUDES  = -I$(D_HEADERS)
+
+D_SRCS    = .
+SRCS      = main.cpp
+
+D_HEADERS = .
+HEADERS   = 
+
+D_OBJS    = builds
+OBJS      = $(SRCS:%.cpp=$(D_OBJS)/%.o)
+
+RM_D_OBJS = rm -rf $(D_OBJS)
+ifeq "$(D_OBJS)" "."
+RM_D_OBJS = 
+endif
+
+
+# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - #
+#             .   target: prerequisites   .   $@ : target             #
+#    RULES    .           recipe          .   $< : 1st prerequisite   #
+#             .           recipe          .   $^ : all prerequisites  #
+# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - #
+
+all: $(NAME)
+
+$(D_OBJS)/%.o: %.cpp | $(D_OBJS)
+	$(CC) $(CFLAGS) -c $< -o $@
+
+$(D_OBJS):
+	mkdir $@
+
+$(OBJS): $(HEADERS:%=$(D_HEADERS)/%)
+
+$(NAME): $(OBJS)
+	$(CC) $(OBJS) -o $@ $(LIBS)
+
+clean:
+	rm -f $(OBJS)
+
+fclean: clean
+	rm -f $(NAME)
+	$(RM_D_OBJS)
+
+re: fclean all
+
+.PHONY : all clean fclean re bonus run valgrind
diff --git a/d01/ex04/main.cpp b/d01/ex04/main.cpp
new file mode 100644
index 0000000..e60f061
--- /dev/null
+++ b/d01/ex04/main.cpp
@@ -0,0 +1,24 @@
+#include <iostream>
+#include <string>
+#include <fstream>
+
+int	main() {
+
+	std::ifstream	file("test.txt");
+
+	// read words separated by whitespaces or newlines
+//	std::string		str;
+//	while (file >> str)
+//		std::cout << str << std::endl;
+
+	// skip whitespaces or newlines
+//	char		c;
+//	while (file >> c)
+//		std::cout << c << std::endl;
+
+	// seems good
+	char	c;
+	while (file.get(c))
+		std::cout << c;
+
+}
diff --git a/d01/ex04/sed b/d01/ex04/sed
new file mode 100755
index 0000000..a254043
Binary files /dev/null and b/d01/ex04/sed differ
diff --git a/d01/ex04/test.txt b/d01/ex04/test.txt
new file mode 100644
index 0000000..3547a3f
--- /dev/null
+++ b/d01/ex04/test.txt
@@ -0,0 +1,27 @@
+No 1 more tears, my heart is dry
+I don't laugh and I don't cry
+I don't think about you all the time
+But when I do - I wonder why
+
+You have to go out of my door
+And leave just like you did before
+I know I said that I was sure
+But rich men can't imagine poor.
+
+One day baby, we'll be old
+Oh baby, we'll be old
+And think of all the stories that we could have told
+
+Little me and little you
+Kept doing all the things they do
+They never really think it through
+Like I can never think you're true
+
+Here I go again - the blame
+The guilt, the pain, the hurt, the shame
+The founding fathers of our plane
+That's stuck in heavy clouds of rain.
+
+One day baby, we'll be old
+Oh baby, we'll be old
+And think of all the stories that we could have told