From aacdf322834cceaf4eca08fc9cf24db7457616ff Mon Sep 17 00:00:00 2001
From: Stoycho Kyosev <68247567+stoychoX@users.noreply.github.com>
Date: Wed, 24 Nov 2021 23:49:09 +0200
Subject: Add files via upload

---
 pract_KN/pract. 07/solutions.cpp                   |  51 +++++++++++++++++++++
 ...70\321\201\321\202\320\265\320\274\320\270.pdf" | Bin 0 -> 81401 bytes
 2 files changed, 51 insertions(+)
 create mode 100644 pract_KN/pract. 07/solutions.cpp
 create mode 100644 "pract_KN/pract. 07/\320\237\320\276\320\261\320\270\321\202\320\276\320\262\320\270 \320\276\320\277\320\265\321\200\320\260\321\206\320\270\320\270 \320\270 \320\261\321\200\320\276\320\271\320\275\320\270 \321\201\320\270\321\201\321\202\320\265\320\274\320\270.pdf"

diff --git a/pract_KN/pract. 07/solutions.cpp b/pract_KN/pract. 07/solutions.cpp
new file mode 100644
index 0000000..f53555c
--- /dev/null
+++ b/pract_KN/pract. 07/solutions.cpp	
@@ -0,0 +1,51 @@
+void getBitwiseRepresentation(int n) {
+	for (int i = 31; i >= 0; --i)
+		std::cout << ((n & (1 << i)) != 0);
+}
+
+void flipFourthBit(int& n) {
+	int mask = 1 << 3;
+	n = n ^ mask;
+}
+
+int numberOfZeroesInBinaryRepresentation(int n) {
+	int cnt = 0;
+	for (int i = 0; i < 32; i++)
+		cnt += ((n & (1 << i)) == 0);
+
+	return cnt;
+}
+
+void setBit(int& n, int bitPosition, bool newBitValue) {
+	int mask = 1 << bitPosition;
+	bool oldBitIsOne = ((mask & n) != 0);
+	if (oldBitIsOne ^ newBitValue)	n = n ^ mask;
+}
+
+void printSubset(int arr[], int length, int indexOfSet) {
+	std::cout << "[";
+	int commas = 0;
+	int numberOfOnes = 32 - numberOfZeroesInBinaryRepresentation(indexOfSet);
+
+	for (int i = 0; i < length; i++) {
+		if (((indexOfSet & (1 << i)) != 0)) {
+			std::cout << arr[i];
+
+			if (++commas < numberOfOnes)
+				std::cout << ", ";
+		}
+	}
+	std::cout << ']' << std::endl;
+}
+
+void generateSubSets(int arr[], int length) {
+	int mask = 0;
+	int border = 1 << length;
+	for (int i = 0; i < border; i++)
+		printSubset(arr, length, i);
+}
+
+//bonus: function to change sign of a number
+void changeSign(int& n) {
+  n = ~n + 1;
+}
diff --git "a/pract_KN/pract. 07/\320\237\320\276\320\261\320\270\321\202\320\276\320\262\320\270 \320\276\320\277\320\265\321\200\320\260\321\206\320\270\320\270 \320\270 \320\261\321\200\320\276\320\271\320\275\320\270 \321\201\320\270\321\201\321\202\320\265\320\274\320\270.pdf" "b/pract_KN/pract. 07/\320\237\320\276\320\261\320\270\321\202\320\276\320\262\320\270 \320\276\320\277\320\265\321\200\320\260\321\206\320\270\320\270 \320\270 \320\261\321\200\320\276\320\271\320\275\320\270 \321\201\320\270\321\201\321\202\320\265\320\274\320\270.pdf"
new file mode 100644
index 0000000..da2a87c
Binary files /dev/null and "b/pract_KN/pract. 07/\320\237\320\276\320\261\320\270\321\202\320\276\320\262\320\270 \320\276\320\277\320\265\321\200\320\260\321\206\320\270\320\270 \320\270 \320\261\321\200\320\276\320\271\320\275\320\270 \321\201\320\270\321\201\321\202\320\265\320\274\320\270.pdf" differ
-- 
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