diff --git a/d01/ex03/HumanB.cpp b/d01/ex03/HumanB.cpp
index 03c8a1f..49fb4c1 100644
--- a/d01/ex03/HumanB.cpp
+++ b/d01/ex03/HumanB.cpp
@@ -1,22 +1,18 @@
 #include "HumanB.hpp"
 
 HumanB::HumanB( std::string name ) {
-
 	this->_name = name;
-
 }
 HumanB::~HumanB() {}
 
 void HumanB::setWeapon( Weapon &weapon ) {
-
 	this->_weapon = &weapon;
-
 }
 
 void HumanB::attack( void ) {
-
+	if (!this->_weapon)
+		return;
 	std::cout << this->_name << " attacks with their ";
 	std::cout << this->_weapon->getType() << std::endl;
-
 }
 
diff --git a/d01/ex03/Weapon.cpp b/d01/ex03/Weapon.cpp
index d92b812..5232fff 100644
--- a/d01/ex03/Weapon.cpp
+++ b/d01/ex03/Weapon.cpp
@@ -1,21 +1,15 @@
 #include "Weapon.hpp"
 
 Weapon::Weapon( std::string type ) {
-
 	this->_type = type;
 	return;
-
 }
 Weapon::~Weapon() {}
 
 std::string const & Weapon::getType( void ) const {
-
 	return this->_type;
-
 }
 
 void Weapon::setType( std::string type ) {
-
 	this->_type = type;
-
 }
diff --git a/d01/ex03/main.cpp b/d01/ex03/main.cpp
index 539263c..b3ff5e0 100644
--- a/d01/ex03/main.cpp
+++ b/d01/ex03/main.cpp
@@ -14,6 +14,7 @@ int main()
 	{
 		Weapon club = Weapon("crude spiked club");
 		HumanB jim("Jim");
+		jim.attack();
 		jim.setWeapon(club);
 		jim.attack();
 		club.setType("some other type of club");
diff --git a/d01/ex03/war b/d01/ex03/war
new file mode 100755
index 0000000..b82da62
Binary files /dev/null and b/d01/ex03/war differ
diff --git a/d01/ex04/Makefile.replace b/d01/ex04/Makefile.replace
new file mode 100644
index 0000000..3f95f8a
--- /dev/null
+++ b/d01/ex04/Makefile.replace
@@ -0,0 +1,66 @@
+# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - #
+#                 .     name = value      .  name is case sensitive   #
+#    VARIABLES    . or  name = value \    .  use VPATH only for .c    #
+#                 .            value      .                  or .cpp  #
+# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - #
+
+NAME      = sed
+
+CC        = c++
+CFLAGS    = -Wall -Wextra -Werror $(INCLUDES) -std=c++98 -g3
+
+VPATH     = $(D_SRCS)
+
+LIBS      =
+
+INCLUDES  = -I$(D_HEADERS)
+
+D_SRCS    = .
+SRCS      = main.cpp \
+			Sed.cpp
+
+D_HEADERS = .
+HEADERS   = Sed.hpp
+
+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)
+
+leaks: $(NAME)
+	valgrind --leak-check=full --show-leak-kinds=all ./$(NAME) Makefile OBJS BANANE
+
+clean:
+	rm -f $(OBJS)
+	rm -f *.replace
+
+fclean: clean
+	rm -f $(NAME)
+	$(RM_D_OBJS)
+
+re: fclean all
+
+.PHONY : all clean fclean re bonus run valgrind
diff --git a/d01/ex04/Sed.cpp b/d01/ex04/Sed.cpp
index b5556e6..32736dd 100644
--- a/d01/ex04/Sed.cpp
+++ b/d01/ex04/Sed.cpp
@@ -16,20 +16,23 @@ void	Sed::replace() {
 	std::ofstream	new_file(this->_new_file.c_str());
 	int				len = this->_find.length();
 	std::string		str;
-	char			c_str[len + 1];
+	char			cstr[len + 1];
 
 	if (file.fail() || new_file.fail())
 		return;
 
-	file.get(c_str, len + 1, EOF);
-	str.assign(c_str);
+	if (len)
+		file.get(cstr, len + 1, EOF);
+	else
+		file.get(cstr, len + 2, EOF);
+	str.assign(cstr);
 	while (!file.eof())
 	{
-		if (this->_find.compare(str) == 0)
+		if (len && this->_find.compare(str) == 0)
 		{
 			new_file << this->_replacement;
-			file.get(c_str, len + 1, EOF);
-			str.assign(c_str);
+			file.get(cstr, len + 1, EOF);
+			str.assign(cstr);
 			continue;
 		}
 		else
@@ -39,6 +42,4 @@ void	Sed::replace() {
 	}
 	str.erase(str.end() - 1);
 	new_file << str;
-
 }
-
diff --git a/d01/ex04/sed b/d01/ex04/sed
new file mode 100755
index 0000000..7faa8e9
Binary files /dev/null and b/d01/ex04/sed differ
diff --git a/d01/ex04/unitests/test.sh b/d01/ex04/unitests/test.sh
index 9031d4b..b014a20 100644
--- a/d01/ex04/unitests/test.sh
+++ b/d01/ex04/unitests/test.sh
@@ -213,3 +213,43 @@ EOF
 )
 run_tests
 
+# TEST 9 ########################################
+TESTNAME="test9"
+FIND=""
+REPLACEMENT="p"
+CONTENT=$(cat << EOF
+No more tears, my heart is dry
+I don't laugh and I don't cry
+I don't think about you all the time
+But when I do - I wonder why
+EOF
+)
+RESULT=$(cat << EOF
+No 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
+EOF
+)
+run_tests
+
+# TEST 10 ########################################
+TESTNAME="test10"
+FIND=""
+REPLACEMENT=""
+CONTENT=$(cat << EOF
+No more tears, my heart is dry
+I don't laugh and I don't cry
+I don't think about you all the time
+But when I do - I wonder why
+EOF
+)
+RESULT=$(cat << EOF
+No 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
+EOF
+)
+run_tests
+
diff --git a/d01/ex04/unitests/test_log/test9 b/d01/ex04/unitests/test_log/test9
new file mode 100644
index 0000000..652b428
--- /dev/null
+++ b/d01/ex04/unitests/test_log/test9
@@ -0,0 +1,4 @@
+No 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
diff --git a/d01/ex04/unitests/test_log/test9.replace b/d01/ex04/unitests/test_log/test9.replace
new file mode 100644
index 0000000..652b428
--- /dev/null
+++ b/d01/ex04/unitests/test_log/test9.replace
@@ -0,0 +1,4 @@
+No 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