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bulls & cows game - the computer will randomize a 4 digit number and the user need to guess it in turns.
digit class - represent a single digit in the game.
number class - represent a number (user/computer randomize)
game class - managing the game.

Bulls & cows/Digit.cpp

@@ -0,0 +1,27 @@
+#include "Digit.h"
+
+
+bool Digit::InArray(int num, int index, Digit array[4])
+{
+	for (int i = ZERO; i < index; i++) {
+		if (num == array[i].value) {
+			return true;
+		}
+	}
+	return false;
+}
+
+
+bool Digit::DEqual(const Digit & TDigit) const
+{
+	if (value == TDigit.value) {
+		return true;
+	}
+	return false;
+}
+
+void Digit::Set_Digit(int num)
+{
+	if(num > ZERO && num <= 9)
+	value = num;
+}

Bulls & cows/Digit.h

@@ -0,0 +1,15 @@
+#define ZERO 0
+using namespace std;
+
+class Digit {     //declaration of digit class
+private:													//private varible int type
+	int value;
+	bool InArray(int num,int index,  Digit array[4]);    ///private method that check if number is an array allready
+public:
+	Digit():value(ZERO) {};						//default constroctor
+	bool DEqual(const Digit &)const;				//checks if digit typ are equal (their values)
+	int Get_Digit() { return value; };				// get function to value varible
+	void Set_Digit(int num);							//set function 
+	friend class Number;						// friends classes declaration
+	friend class Game;
+};

Bulls & cows/Number.cpp

@@ -0,0 +1,68 @@
+#include "Number.h"
+#include <ctime>
+Number::Number()
+{
+	for (int i = ZERO; i < 4; i++) {
+		(number[i]).Set_Digit(ZERO);
+	}
+}
+
+void Number::randomise()
+{
+	int temp;
+	srand(time(NULL));
+	(number)[ZERO].value = (rand() % 9) + 1;
+	for (int i = 1; i < 4; i++) {
+		do
+		{
+			temp = (rand() % 9) + 1;
+			if (number[i].InArray(temp, i, number) == false) {
+				number[i].value = temp;
+			}
+
+		} while (number[i].InArray(temp, i, number) == true);
+	}
+}
+void Number::EnterValue()
+{
+	int num,ones,tens ,hund,thous;
+
+	int i = ZERO;
+	do
+	{
+		if (i == ZERO) {
+			cout << "please enter a 4 digit integer without returning values or 0" << endl;
+			cin >> num;
+		}
+		if (i > ZERO) {
+			cout << "invalid input try agian" << endl;
+			cin >> num;
+		}
+		ones = num % 10;
+		tens = (num / 10) % 10;
+		hund = (num / 100) % 10;
+		thous = (num / 1000) % 10;
+		number[ZERO].value = thous;
+		number[1].value = hund;
+		number[2].value = tens;
+		number[3].value = ones;
+		i++;
+	} 
+	while (ones == ZERO || ones == tens || ones == hund || ones == thous || tens == ZERO || tens == hund || tens == thous || hund == ZERO || hund == thous || thous == ZERO || num < 1000 || num > 9999 ); 
+}
+
+int Number::Get_Value(int num)
+{
+	if (num < 0 || num > 3) {
+		return -1;
+	}
+	else {
+		return (number)[num].value;
+	}
+}
+
+void Number::PrintNumber()
+{
+	int num = 1000 * (number)[ZERO].value + 100 * (number)[1].value + 10 * (number)[2].value + (number)[3].value;
+	cout << num ;
+}

Bulls & cows/Number.h

@@ -0,0 +1,18 @@
+#include <iostream>
+#include <ctime>
+#include "Digit.h"
+#define ZERO 0
+using namespace std;
+
+class Number							//class declaration
+{
+private:
+	Digit number[4];									// an array of 4 digits type
+public:
+	Number();												// default constroctor
+	void randomise();												// a function that randomise number
+	void EnterValue();												// a function that help user enter a 4 digit number into the array
+	int Get_Value(int num);								// a function that return a chosen value from the array
+	void PrintNumber();												// a function that prints the array
+	friend class Game;									//declaration of friend class
+};

Bulls & cows/bullsNcows.cpp

@@ -0,0 +1,13 @@
+#define ZERO 0
+#include "game1.h"
+int main() {
+	cout << "==========================================\n" << "hello, this is the game 'bulls and cows' . " << endl;
+	cout << "==========================================" << endl;
+	cout << "the computer concieved 4 - digits number (all digits are different and without 0)." << endl;
+	cout << "your task - guess it threw number inputs." << endl;
+	cout << "if the digit is identical, but it's at another location - this is a 'cow'\nif the digit is in the right place - its a 'bull'" << endl;
+	Game PLAY;
+
+	PLAY.play();
+	return 0;
+}

Bulls & cows/game1.cpp

@@ -0,0 +1,102 @@
+#include "game1.h"
+
+int Game::Cows()const
+{
+	int cows = ZERO;
+	for (int i = ZERO; i < 4; i++) {
+		for (int j = ZERO; j < 4; j++) {
+			if (i != j && (computer->number)[i].value == (user->number)[j].value) {
+				cows++;
+			}
+		}
+	}
+	return cows;
+}
+
+int Game::Bulls() const
+{
+	int bulls = ZERO;
+	for (int i = ZERO; i < 4; i++) {
+		if ((computer->number)[i].value == (user->number)[i].value) {
+			bulls++;
+		}
+
+	}
+	return bulls;
+}
+
+Game::Game()
+{
+	user = new Number;
+	computer = new Number;
+	computer->randomise();
+	user->EnterValue();
+}
+
+Game::Game(const Game & obj)
+{
+	if (user == NULL && computer == NULL) {
+		user = new Number;
+		computer = new Number;
+	}
+	else
+	{
+		delete user;
+		delete computer;
+		user = new Number;
+		computer = new Number;
+	}
+	for (int i = 0; i < 4; i++)
+	{
+		(user->number)[i].Set_Digit((obj.user)->number[i].Get_Digit());
+		(computer->number)[i].Set_Digit((obj.computer)->number[i].Get_Digit());
+	}
+}
+
+void Game::play()
+{														
+	char str;
+	do
+	{
+
+
+		cout << "Number   B   C\n" << "---------------" << endl;
+		while (this->CheckWin() == false) {
+			this->PrintUser();
+			cout << "    " << this->Bulls() << "   " << this->Cows() << endl;
+			this->Set_user();
+		}
+		cout << "************\nYOU WIN !!!\n************" << endl;
+		cout << "new game? Y/N" << endl;
+		cin >> str;
+		if (str != 'y') {
+			cout << "have a good day" << endl;
+		}
+		else {
+			this->Set_user();
+		}
+	}while (str == 'y');
+}
+
+bool Game::CheckWin() const
+{
+	for (int i = ZERO; i < 4; i++) {
+		if ((computer->number)[i].value != (user->number)[i].value) {
+			return false;
+		}
+	}
+	return true;
+}
+
+void Game::PrintUser() const
+{
+	user->PrintNumber();
+}
+
+void Game::Set_user()
+{
+	user->EnterValue();
+}
+
+
+

Bulls & cows/game1.h

@@ -0,0 +1,17 @@
+#include "Number.h"
+#define ZERO 0
+using namespace std;
+class Game {					// class declaration
+private:
+	Number *user = NULL, *computer = NULL;				//private variable declartion pointers to numbers class
+	int Cows()const;
+	int Bulls()const;
+public:																	
+	Game();											// default constroctor allocates memory
+	Game(const Game & obj);								// copy constroctor
+	~Game() { delete user; delete computer; };					///destroctor to free dynamic memory
+	void play();												// play method that runs and manges the game
+	bool CheckWin()const;									// function that checks if the game is over
+	void PrintUser()const;									// function that prints user number array
+	void Set_user();											// a function to intialize user number in every turn
+};