diff --git a/lesson_3/exercise_4.hpp b/lesson_3/exercise_4.hpp
index ade8be2..7563beb 100644
--- a/lesson_3/exercise_4.hpp
+++ b/lesson_3/exercise_4.hpp
@@ -1,8 +1,44 @@
 #ifndef EXERCISE_4_HPP_
 #define EXERCISE_4_HPP_
 
+#include <iostream>
 
+class Card
+{
+public:
+	enum rank {ACE = 1, TWO, THREE, FOUR, FIVE, SIX, SEVEN, EIGHT, NINE, TEN, JACK, QUEEN, KING};
+	enum suit {CLUBS, DIAMONDS, HEARTS, SPADES};
 
+	Card(rank r = ACE, suit s = SPADES, bool ifu = true):  m_Rank(r), m_Suit(s), m_IsFaceUp(ifu) { }
 
+	int GetValue() const;
+	void Flip();
+
+//	friend std::ostream& operator<<(std::ostream& s, const Card& aCard);
+
+private:
+	rank m_Rank;
+	suit m_Suit;
+	bool m_IsFaceUp;
+};
+
+int Card::GetValue() const
+{
+	int value = 0;
+	if (m_IsFaceUp)
+	{
+		value = m_Rank;
+		if (value > 10)
+		{
+			value = 10;
+		}
+	}
+	return value;
+}
+
+void Card::Flip()
+{
+	m_IsFaceUp = !m_IsFaceUp;
+}
 
 #endif
diff --git a/lesson_3/main.cpp b/lesson_3/main.cpp
index 065bbe5..c8a17cc 100644
--- a/lesson_3/main.cpp
+++ b/lesson_3/main.cpp
@@ -15,10 +15,9 @@ void ex_4();
 
 int main()
 {
-//	ex_1();
-//	ex_2();
+	ex_1();
+	ex_2();
 	ex_3();
-	ex_4();
 
 	return 0;
 }
@@ -129,8 +128,3 @@ void ex_3()
 	 * [c >= a] 0 >= 3/9 is false
 	 */
 }
-
-void ex_4()
-{
-
-}