sem 5

4 files changed, 304 insertions, 0 deletions

diff --git a/Sem. 05/BullsAndColls.cpp b/Sem. 05/BullsAndColls.cpp
new file mode 100644
index 0000000..93594b6
--- /dev/null
+++ b/Sem. 05/BullsAndColls.cpp
@@ -0,0 +1,132 @@
+#include <iostream>
+using namespace std;
+
+// Задача:
+// Играта бикове и крави.
+// Въвежда се число от потребителя. (скриваме го)
+
+// Приемаме заявки от вида :
+// x
+// 2 бика и 2 крави.
+const int DIGITS_COUNT = 5;
+
+
+int getNumberLength(int n)
+{
+	int count = 0;
+
+	if (n == 0)
+		return 1;
+
+	while (n != 0)
+	{
+		n /= 10;
+		count++;
+	}
+	return count;
+}
+
+bool containsDigit(int n, int searchedDigit)
+{
+	while (n != 0)
+	{
+		int lastDigit = n % 10;
+
+		if (lastDigit == searchedDigit)
+			return true;
+
+		n /= 10;
+	}
+	return false;
+}
+
+bool onlyDiffrentDigits(int n)
+{
+	while (n != 0)
+	{
+		int lastDigit = n % 10;
+		n /= 10;
+
+		if (containsDigit(n, lastDigit))
+			return false;
+	}
+
+	return true;
+}
+
+bool isValid(int n)
+{
+	return getNumberLength(n) == DIGITS_COUNT &&  onlyDiffrentDigits(n);
+}
+
+void userInput(int& input)
+{
+	do
+	{
+		cin >> input;
+	} while (!isValid(input));
+}
+
+int getBulls(int toGuess, int myGuess)
+{
+	int count = 0;
+
+	while (toGuess != 0)
+	{
+		int toGuessLastDigit = toGuess % 10;
+		int myGuessLastDigit = myGuess % 10;
+
+		if (toGuessLastDigit == myGuessLastDigit)
+			count++;
+
+		toGuess /= 10;
+		myGuess /= 10;
+	}
+	return count;
+}
+
+int getSumOfBullsAndCows(int  toGuess, int myGuess)
+{
+	int count = 0;
+	while (myGuess != 0)
+	{
+		int lastDigit = myGuess % 10;
+
+		if (containsDigit(toGuess, lastDigit))
+			count++;
+
+		myGuess /= 10;
+	}
+
+	return count;
+}
+
+void getBullsAndCows(int toGuess, int myGuess, int& bulls, int& cows)
+{
+	bulls = getBulls(toGuess, myGuess);
+	cows = getSumOfBullsAndCows(toGuess, myGuess) - bulls;
+}
+
+
+int main()
+{
+	int toGuess;
+	userInput(toGuess);
+
+	cout << "Success! Try to guess the number:" << 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/references.cpp b/Sem. 05/references.cpp
new file mode 100644
index 0000000..fc89cb2
--- /dev/null
+++ b/Sem. 05/references.cpp
@@ -0,0 +1,56 @@
+#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();
+}
diff --git a/Sem. 05/task15_sem3.cpp b/Sem. 05/task15_sem3.cpp
new file mode 100644
index 0000000..652a201
--- /dev/null
+++ b/Sem. 05/task15_sem3.cpp
@@ -0,0 +1,58 @@
+#include <iostream>
+using namespace std;
+
+int main()
+{
+	int n;
+	cin >> n;
+
+	int spacesCount = 2 * (n - 1) + n + 2 * (n - 1);
+	int toGuess;
+	for (int i = 1; i <= n - 1; i++)
+	{
+		for (int j = 1; j <= i; j++)
+			cout << j << " ";
+
+		for (int j = 0; j < spacesCount; j++)
+			cout << " ";
+
+		for (int j = i; j >= 1; j--)
+			cout << " " << j;
+
+		spacesCount -= 4;
+
+		cout << endl;
+
+	}
+
+	//mid
+	for (int i = 1; i <= n; i++)
+		cout << i << " ";
+	for (int i = 0; i < n; i++)
+		cout << '-';
+	for (int i = n; i >= 1; i--)
+		cout << " " << i;
+	cout << endl;
+
+
+	//down
+	spacesCount += 4;
+	for (int i = n - 1; i >= 0; i--)
+	{
+		for (int j = 1; j <= i; j++)
+			cout << j << " ";
+
+		for (int j = 0; j < spacesCount; j++)
+			cout << " ";
+
+		for (int j = i; j >= 1; j--)
+			cout << " " << j;
+
+		spacesCount += 4;
+
+		cout << endl;
+
+	}
+
+
+} 
diff --git a/Sem. 05/task16_sem3.cpp b/Sem. 05/task16_sem3.cpp
new file mode 100644
index 0000000..652a201
--- /dev/null
+++ b/Sem. 05/task16_sem3.cpp
@@ -0,0 +1,58 @@
+#include <iostream>
+using namespace std;
+
+int main()
+{
+	int n;
+	cin >> n;
+
+	int spacesCount = 2 * (n - 1) + n + 2 * (n - 1);
+	int toGuess;
+	for (int i = 1; i <= n - 1; i++)
+	{
+		for (int j = 1; j <= i; j++)
+			cout << j << " ";
+
+		for (int j = 0; j < spacesCount; j++)
+			cout << " ";
+
+		for (int j = i; j >= 1; j--)
+			cout << " " << j;
+
+		spacesCount -= 4;
+
+		cout << endl;
+
+	}
+
+	//mid
+	for (int i = 1; i <= n; i++)
+		cout << i << " ";
+	for (int i = 0; i < n; i++)
+		cout << '-';
+	for (int i = n; i >= 1; i--)
+		cout << " " << i;
+	cout << endl;
+
+
+	//down
+	spacesCount += 4;
+	for (int i = n - 1; i >= 0; i--)
+	{
+		for (int j = 1; j <= i; j++)
+			cout << j << " ";
+
+		for (int j = 0; j < spacesCount; j++)
+			cout << " ";
+
+		for (int j = i; j >= 1; j--)
+			cout << " " << j;
+
+		spacesCount += 4;
+
+		cout << endl;
+
+	}
+
+
+}