diff --git a/cpp_09/BitcoinExchange.cpp b/cpp_09/BitcoinExchange.cpp
deleted file mode 100644
index e69de29..0000000
diff --git a/ex00/BitcoinExchange.cpp b/ex00/BitcoinExchange.cpp
new file mode 100644
index 0000000..df535ac
--- /dev/null
+++ b/ex00/BitcoinExchange.cpp
@@ -0,0 +1,18 @@
+#include "BitcoinExchange.hpp"
+
+BitcoinExchange::BitcoinExchange()
+{}
+
+BitcoinExchange::BitcoinExchange(const BitcoinExchange &other)
+{
+	this->_data = other._data;
+}
+
+BitcoinExchange::~BitcoinExchange()
+{}
+
+BitcoinExchange &BitcoinExchange::operator=(const BitcoinExchange &other)
+{
+	this->_data = other._data;
+	return (*this);
+}
diff --git a/cpp_09/BitcoinExchange.hpp b/ex00/BitcoinExchange.hpp
similarity index 99%
rename from cpp_09/BitcoinExchange.hpp
rename to ex00/BitcoinExchange.hpp
index 62855e5..24aff7f 100644
--- a/cpp_09/BitcoinExchange.hpp
+++ b/ex00/BitcoinExchange.hpp
@@ -14,13 +14,12 @@ class BitcoinExchange
 
 	void loadDatabase(const std::string &filename);
 	void processInput(const std::string &filename);
-
-  private:
-	std::map<std::string, float> _data;
-
 	float getRate(const std::string &date) const;
 	bool isValidDate(const std::string &date) const;
 	bool isValidValue(const std::string &value, float &out) const;
+
+  private:
+	std::map<std::string, float> _data;
 };
 
 #endif
diff --git a/ex00/Makefile b/ex00/Makefile
index 06e53cf..b31ee8e 100644
--- a/ex00/Makefile
+++ b/ex00/Makefile
@@ -1,7 +1,7 @@
 CXX = c++
 CXXFLAGS = -Wall -Wextra -Werror -std=c++98
 OBJDIR = obj
-SOURCES = Main.cpp
+SOURCES = Main.cpp BitcoinExchange.cpp 
 OBJECTS = $(addprefix $(OBJDIR)/, $(SOURCES:.cpp=.o))
 NAME = btc