Added todays practice

1 files changed, 127 insertions, 0 deletions

diff --git a/Year 1/Object-oriented Programming/02-Practice-01.02.2022.cpp b/Year 1/Object-oriented Programming/02-Practice-01.02.2022.cpp
new file mode 100644
index 0000000..7c0382a
--- /dev/null
+++ b/Year 1/Object-oriented Programming/02-Practice-01.02.2022.cpp
@@ -0,0 +1,127 @@
+#include <iostream>
+#include <fstream>
+#include <cstring>
+
+// Exercise 1
+
+void ex1() {
+	int a, b, c;
+	std::cin >> a >> b >> c;
+
+	std::ofstream resultFile("result.txt");
+	resultFile << (a + b + c) << " " << (a * b * c);
+	resultFile.close();
+
+	std::ifstream resultedFile("result.txt");
+	int sum, prod;
+	resultedFile >> sum >> prod;
+	std::cout << (sum - prod);
+	resultedFile.close();
+}
+
+// Exercise 2
+
+const int BUFF_SIZE = 1024;
+
+int strlen(char* const str) {
+	int ind = 0;
+	while (str[ind] != '\0')
+		ind++;
+	return ind;
+}
+
+int lengthOfFile(std::ifstream& file) {
+	int len = 0;
+	char buffer[BUFF_SIZE];
+	while (!file.eof()) {
+		file.getline(buffer, BUFF_SIZE);
+		len += strlen(buffer);
+	}
+	return len;
+}
+
+void ex2() {
+	std::ifstream resultFile("result.txt");
+	std::cout << lengthOfFile(resultFile) << std::endl;
+	resultFile.close();
+}
+
+// Exercise 3
+
+struct Pair {
+	unsigned int left;
+	unsigned int right;
+};
+
+Pair createPair(unsigned int left, unsigned int right) {
+	return { left, right };
+}
+
+Pair readPairFromFile(std::ifstream& inFile) {
+	unsigned int left, right;
+	inFile >> left >> right;
+	return createPair(left, right);
+}
+
+void writePairToFile(std::ofstream& outFile, Pair pr) {
+	outFile << pr.left << " " << pr.right << std::endl;
+}
+
+void printPair(Pair pr) {
+	std::cout << "(" << pr.left << "," << pr.right << ")" << std::endl;
+}
+
+const int MAX_REL_SIZE = 25;
+
+struct Relation {
+	Pair pairs[MAX_REL_SIZE];
+	int size;
+};
+
+Relation initRelation() {
+	return { {}, 0 };
+}
+
+bool addPairToRelation(Relation& rel, Pair pr) {
+	if (rel.size == MAX_REL_SIZE)
+		return false;
+
+	rel.pairs[rel.size++] = pr;
+
+	return true;
+}
+
+Relation readRelationFromFile(std::ifstream& inFile) {
+	Relation rel = initRelation();
+	while (!inFile.eof())
+		addPairToRelation(rel, readPairFromFile(inFile));
+
+	return rel;
+}
+
+void writeRelationToFile(Relation rel, std::ofstream& outFile) {
+	for (int i = 0; i < rel.size; i++)
+		writePairToFile(outFile, rel.pairs[i]);
+}
+
+void ex3() {
+	Relation rel = {
+		{ { 0, 1 }, {2, 3}, {5, 5}, {9, 100} }, 4
+	};
+	std::ofstream outFile("relation.txt");
+	writeRelationToFile(rel, outFile);
+	outFile.close();
+
+	std::ifstream inFile("relation.txt");
+	if (!inFile.is_open())
+		std::cout << "Bruh" << std::endl;
+
+	rel = readRelationFromFile(inFile);
+	for (int i = 0; i < rel.size; i++)
+		printPair(rel.pairs[i]);
+	inFile.close();
+}
+
+int main() {
+	ex3();
+}