diff --git a/cpp_09/BitcoinExchange.cpp b/cpp_09/BitcoinExchange.cpp
new file mode 100644
index 0000000..e69de29
diff --git a/cpp_09/BitcoinExchange.hpp b/cpp_09/BitcoinExchange.hpp
new file mode 100644
index 0000000..62855e5
--- /dev/null
+++ b/cpp_09/BitcoinExchange.hpp
@@ -0,0 +1,26 @@
+#ifndef BITCOINEXCHANGE_HPP
+#define BITCOINEXCHANGE_HPP
+
+#include <map>
+#include <string>
+
+class BitcoinExchange
+{
+  public:
+	BitcoinExchange();
+	BitcoinExchange(const BitcoinExchange &other);
+	BitcoinExchange &operator=(const BitcoinExchange &other);
+	~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;
+};
+
+#endif
diff --git a/ex00/Makefile b/ex00/Makefile
index 8007857..06e53cf 100644
--- a/ex00/Makefile
+++ b/ex00/Makefile
@@ -3,7 +3,7 @@ CXXFLAGS = -Wall -Wextra -Werror -std=c++98
 OBJDIR = obj
 SOURCES = Main.cpp
 OBJECTS = $(addprefix $(OBJDIR)/, $(SOURCES:.cpp=.o))
-NAME = Easyfind
+NAME = btc
 
 all: $(NAME)