sem5

2 files changed, 235 insertions, 0 deletions

diff --git a/Sem. 05_kn/BullsAndCows.cpp b/Sem. 05_kn/BullsAndCows.cpp
new file mode 100644
index 0000000..1ab2289
--- /dev/null
+++ b/Sem. 05_kn/BullsAndCows.cpp
@@ -0,0 +1,116 @@
+#include <iostream>
+using namespace std;
+// Играта - бикове и крави.
+
+
+const int DIGITS_COUNT = 3;
+
+int getNumLen(int n)
+{
+	int count = 0;
+	while (n != 0)
+	{
+		count++;
+		n /= 10;
+	}
+	return count;
+}
+
+bool containsDigit(int n, int digit)
+{
+	while (n != 0)
+	{
+		int lastDigit = n % 10;
+
+		if (digit == lastDigit)
+			return true;
+
+		n /= 10;
+	}
+	return false;
+}
+bool containsDiffrentDigits(int n)
+{
+	while (n >= 10)
+	{
+		int lastDigit = n % 10;
+		n /= 10;
+
+		if (containsDigit(n, lastDigit))
+			return false;
+	}
+	return true;
+}
+
+bool isValid(int n)
+{
+	return getNumLen(n) == DIGITS_COUNT && containsDiffrentDigits(n);
+}
+
+void userInput(int& toGuess)
+{
+	do
+	{
+		cin >> toGuess;
+	} while (!isValid(toGuess));
+}
+
+int getBulls(int toGuess, int myGuess)
+{
+	int bulls = 0;
+	while (toGuess != 0)
+	{
+		int toGuessLastDigit = toGuess % 10;
+		int myGuessLastDigit = myGuess % 10;
+
+		if (toGuessLastDigit == myGuessLastDigit)
+			bulls++;
+		
+		toGuess /= 10;
+		myGuess /= 10;
+	}
+	return bulls;
+}
+
+int getCows(int toGuess, int myGuess, int bulls)
+{
+	int cows = 0;
+	while (myGuess != 0)
+	{
+		int lastDigit = myGuess % 10;
+
+		if (containsDigit(toGuess, lastDigit))
+			cows++;
+
+		myGuess /= 10;
+	}
+	return cows - bulls;
+}
+
+void getBullsAndCows(int toGuess, int myGuess, int& bulls, int& cows)
+{
+	bulls = getBulls(toGuess, myGuess);
+	cows = getCows(toGuess, myGuess, bulls);
+}
+
+int main()
+{
+	int toGuess;
+	userInput(toGuess);
+
+	cout << "Try to guess:" << endl;
+
+	int bulls = 0;
+	int cows = 0;
+
+	while (bulls != DIGITS_COUNT)
+	{
+		int myGuess;
+		userInput(myGuess);
+		getBullsAndCows(toGuess, myGuess, bulls, cows);
+
+		cout << "Bulls: " << bulls << " " << ", Cows: " << cows << endl;
+	}
+
+	cout << "Success!" << endl;
+} 
diff --git a/Sem. 05_kn/refferences.cpp b/Sem. 05_kn/refferences.cpp
new file mode 100644
index 0000000..47e4fba
--- /dev/null
+++ b/Sem. 05_kn/refferences.cpp
@@ -0,0 +1,119 @@
+#include <iostream>
+using namespace std;
+
+
+int f(int n)
+{
+	n++;
+	return n;
+}
+
+// lvalue ("връщане на променлива")
+// rvalue ("връщане на константа")
+
+//Референция - друго име за някоя променлива
+
+// Пример: 
+// Напишете функция, която приема цяло число и връща най-голямата и най-малката цифра.
+
+void getMaxAndMinDigit(int n, int& maxDigit, int& minDigit)
+{
+	int max = 0;
+	int min = 9;
+
+	while (n != 0)
+	{
+		int lastDigit = n % 10;
+
+		if (lastDigit > max)
+			max = lastDigit;
+
+		if (lastDigit < min)
+			min = lastDigit;
+
+		n /= 10;
+	}
+	maxDigit = max;
+	minDigit = min;
+
+}
+
+//!
+
+int& f(int& n) //--няма да върне копие.
+{
+	n++;
+	return n;
+}
+
+int main()
+{
+	int n;
+	cin >> n;
+
+	int max, min;
+
+	getMaxAndMinDigit(n, max, min);
+	cout << "Min digit " << min << " " << "max digit " << max << endl;
+}
+
+
+
+
+
+#include <iostream>
+using namespace std;
+
+// lvalue ("връщане на променлива")
+// rvalue ("връщане на константа")
+
+//Референция - друго име за някоя променлива
+
+//Пример: 
+// Напишете функция, която приема цяло число и връща най-голямата и най-малката цифра.
+
+void getMaxAndMinDigit(int n, int& maxDigit, int& minDigit)
+{
+	int max = 0;
+	int min = 9;
+
+	while (n != 0)
+	{
+		int lastDigit = n % 10;
+
+		if (lastDigit > max)
+			max = lastDigit;
+
+		if (lastDigit < min)
+			min = lastDigit;
+
+		n /= 10;
+	}
+	maxDigit = max;
+	minDigit = min;
+
+}
+
+
+int f1(int& n) //-връщат константа (rvalue)
+{
+	n++;
+	return n;
+}
+int& f2(int& n) //--връщат променлива (lvalue).
+{
+	n++;
+	return n;
+}
+///!!!!!!!!!!! error
+int& f3()
+{
+	int a = 10;
+	return a;
+}
+int main()
+{
+	cout << ++f();
+
+
+}