1 files changed, 148 insertions, 0 deletions
diff --git a/Sem. 02/task3_not_done.cpp b/Sem. 02/task3_not_done.cpp
new file mode 100644
index 0000000..d473e70
--- /dev/null
+++ b/Sem. 02/task3_not_done.cpp
@@ -0,0 +1,148 @@
+#include <iostream>
+#include <fstream>
+#pragma warning(disable:4996)
+using namespace std;
+
+const size_t capacity = 1024;
+
+enum class Speciality
+{
+	computerScience,
+	softwareEngineering
+};
+
+struct StudentRecord
+{
+	char firstName[capacity];
+	char lastName[capacity];
+
+	char fnRaw[capacity];
+
+	//parsed by fnRaw
+	Speciality studentSpeciality;
+	int fn;
+	//
+
+	char email[capacity];
+};
+
+struct StudentCollection
+{
+	StudentRecord* data;
+};
+
+size_t getLinesCount(const char* fileName)
+{
+	ifstream file(fileName);
+
+	if (!file.is_open())
+		return 0;
+
+	size_t count = 0;
+
+	while (!file.eof())
+	{
+		char buff[capacity];
+		file.getline(buff, capacity);
+		count++;
+	}
+
+	file.close();
+
+	return count;
+
+}
+
+void parseField(char* dest, const char*& source)
+{
+	while (*source != ',' && *source != '\0')
+	{
+		*dest = *source;
+		dest++;
+		source++;
+	}
+	source++;
+	*dest = '\0';
+}
+
+void parseFn(StudentRecord& currentStudent)
+{
+	if (strlen(currentStudent.fnRaw) < 5)
+		return;
+
+	if (currentStudent.fnRaw[4] == '6')
+		currentStudent.studentSpeciality = Speciality::softwareEngineering;
+	else if (currentStudent.fnRaw[4] == '8')
+		currentStudent.studentSpeciality = Speciality::computerScience;
+
+	currentStudent.fn = atoi(currentStudent.fnRaw + 5);
+
+}
+
+void parseStudent(StudentRecord& currentStudent, const char* line)
+{
+	parseField(currentStudent.firstName, line);
+	parseField(currentStudent.lastName, line);
+	parseField(currentStudent.fnRaw, line);
+	parseField(currentStudent.email, line);
+	parseFn(currentStudent);
+}
+
+void printStudent(const StudentRecord& st)
+{
+	std::cout << "First name: " << st.firstName << ", second name: " << st.lastName << ", speciality: ";
+
+	if (st.studentSpeciality == Speciality::computerScience)
+		std::cout << "computer science, ";
+	else
+		std::cout << "software engineering, ";
+
+	std::cout << "number: " << st.fn << ", email: " << st.email << std::endl;
+
+}
+
+size_t initStudentCollection(StudentCollection& collection, const char* fileName)
+{
+	size_t studentsCount = getLinesCount(fileName) - 1;
+
+	collection.data = new StudentRecord[studentsCount];
+
+	ifstream file(fileName);
+	if (!file.is_open())
+	{
+		cout << "error";
+		return 0;
+	}
+
+	char buff[capacity];
+	file.getline(buff, capacity);
+	for (int i = 0; i < studentsCount; i++)
+	{
+		file.getline(buff, capacity);
+		parseStudent(collection.data[i], buff);
+	}
+
+	return studentsCount;
+}
+
+void saveToFile(const char* fileName, const StudentCollection& collection, size_t studentsCount)
+{
+	ofstream file(fileName);
+	if (!file.is_open())
+		return;
+	file << "Ime, Familiya, Fakulteten nomer, Imeyl adres" << std::endl; //header;
+	for (int i = 0; i < studentsCount; i++)
+		file << collection.data[i].firstName << "," << collection.data[i].lastName << "," << collection.data[i].fnRaw << "," << collection.data[i].email << std::endl;
+}
+int main()
+{
+	const char* fileName = "lists/all_students.csv";
+	
+	StudentCollection collection;
+	size_t studentsCount = initStudentCollection(collection, fileName);
+	
+	//changes to students email
+
+	saveToFile(fileName, collection, studentsCount);
+	delete[] collection.data;
+}