1 files changed, 247 insertions, 1 deletions
diff --git a/pract SI/week3/solution.cpp b/pract SI/week3/solution.cpp
index e17a56a..e61ea78 100644
--- a/pract SI/week3/solution.cpp
+++ b/pract SI/week3/solution.cpp
@@ -1 +1,247 @@
-👀👀👀
+#include<iostream>
+#include<fstream>
+#include<cstring>
+
+// Fix problems with strcpy in visual studio
+#pragma warning (disable : 4996)
+
+const int MAX_LENGTH   = 25;
+const char FILE_PATH[] = "offers-database.txt";
+
+// Clear std::cin
+void flushStream() {
+	std::cin.clear();
+	std::cin.ignore(255, '\n');
+}
+
+struct jobOffer {
+	char name[MAX_LENGTH];
+	int peopleCount;
+	int restDaysCount;
+	long long salary;
+};
+
+jobOffer createOffer(char name[MAX_LENGTH], int colCount, int restDays, long long salary) {
+	jobOffer toReturn;
+	strcpy(toReturn.name, name);
+	toReturn.peopleCount = colCount;
+	toReturn.restDaysCount = restDays;
+	toReturn.salary = salary;
+
+	return toReturn;
+}
+
+// Read offer from stdin
+jobOffer readOffer() {
+	std::cout << "Enter company name [max " << MAX_LENGTH << " symbols!]: ";
+	char name[MAX_LENGTH];
+	int colCount = 0;
+	int restDays = 0;
+	long long salary = 0;
+
+	std::cin.getline(name, MAX_LENGTH, '\n');
+
+	std::cout << "Add colleague count: ";
+
+	std::cin >> colCount;
+	std::cout << "Add rest days: ";
+	std::cin >> restDays;
+	std::cout << "Add salary: ";
+	std::cin >> salary;
+
+	flushStream();
+	return createOffer(name, colCount, restDays, salary);
+}
+
+void saveOfferToFile(std::ofstream& outFile, const jobOffer& offer) {
+	/*int size = strlen(offer.name);
+	outFile.write((const char*)&size, sizeof(int));
+
+	outFile.write(offer.name, size * sizeof(char));
+
+	outFile.write((const char*)(&offer.peopleCount), sizeof(offer.peopleCount));
+
+	outFile.write((const char*)(&offer.restDaysCount), sizeof(offer.restDaysCount));
+
+	outFile.write((const char*)(&offer.salary), sizeof(offer.salary));*/
+	outFile.write((const char*)&offer, sizeof(offer));
+}
+
+void drawLine(int length) {
+	for (int i = 0; i < length + 13; i++)
+		std::cout << '-';
+	std::cout << std::endl;
+}
+
+void printOffer(const jobOffer& j) {
+	int nameLen = strlen(j.name);
+	drawLine(nameLen);
+	std::cout << "Company name: " << j.name <<
+		"\nPeople in team: " << j.peopleCount << 
+		"\nRest days: " << j.restDaysCount << 
+		"\nSalary: " << j.salary << std::endl;
+	drawLine(nameLen);
+	std::cout << std::endl;
+}
+
+void readOffer(std::ifstream& inFile, jobOffer& toRead) {
+	/*int length = 0;
+	inFile.read((char*)&length, sizeof(length));
+	inFile.read(toRead.name, length);
+	toRead.name[length] = '\0';
+
+	inFile.read((char*)&toRead.peopleCount, sizeof(toRead.peopleCount));
+	inFile.read((char*)&toRead.restDaysCount, sizeof(toRead.restDaysCount));
+	inFile.read((char*)&toRead.salary, sizeof(toRead.salary));*/
+	inFile.read((char*)&toRead, sizeof(toRead));
+}
+
+void addOffers(const char* filePath, int n) {
+	std::ofstream outFile(filePath, std::ios::binary | std::ios::app);
+
+	if (!outFile) {
+		std::cerr << "Problem with oppening file " << filePath;
+		return;
+	}
+
+	for (int i = 0; i < n; i++) {
+		jobOffer toWrite = readOffer();
+		saveOfferToFile(outFile, toWrite);
+	}
+
+	outFile.close();
+}
+
+void filterOffers(const char* filePath, long long minSalary) {
+	std::ifstream inFile(filePath, std::ios::binary);
+
+	if (!inFile) {
+		std::cerr << "Error";
+		return;
+	}
+
+	// Same as !inFile.eof()
+	while (inFile) {
+		jobOffer toRead;
+		readOffer(inFile, toRead);
+		if (!inFile)
+			break;
+		if (toRead.salary >= minSalary)
+			printOffer(toRead);
+	}
+
+	inFile.close();
+}
+
+bool searchOffer(const char* filePath, const char* name) {
+	std::ifstream inFile(filePath, std::ios::binary);
+
+	if (!inFile) {
+		std::cerr << "Error";
+		return false;
+	}
+
+	while (inFile) {
+		jobOffer toRead;
+		readOffer(inFile, toRead);
+		if (!inFile)
+			break;
+		if (!strcmp(toRead.name, name)) {
+			inFile.close();
+			return true;
+		}
+	}
+
+	inFile.close();
+	return false;
+}
+
+bool isPerfect(const jobOffer& j, int maxCoworkers, int minVacancyDays, int minSalary) {
+	return j.peopleCount <= maxCoworkers && j.restDaysCount >= minVacancyDays && j.salary >= minSalary;
+}
+
+void saveOfferToTextFile(std::ofstream& outFile, const jobOffer& j) {
+	outFile << j.name << " " << j.peopleCount << " " << j.restDaysCount << " " << j.salary << std::endl;
+}
+
+void perfectOffer(const char* filePath, int maxCoworkers, int minVacancyDays, int minSalary) {
+	std::ifstream inFile(filePath, std::ios::binary);
+	std::ofstream outFile("perfect.txt", std::ios::app);
+
+	if (!inFile) {
+		std::cerr << "Error";
+		return;
+	}
+
+	while (inFile) {
+		jobOffer toRead;
+		readOffer(inFile, toRead);
+		if (!inFile)
+			break;
+		if (isPerfect(toRead, maxCoworkers, minVacancyDays, minSalary))
+			saveOfferToTextFile(outFile, toRead);
+	}
+
+	inFile.close();
+}
+
+void printAll(const char* filePath) {
+	std::ifstream inFile(filePath, std::ios::binary);
+
+	if (!inFile) {
+		std::cerr << "Error";
+		return;
+	}
+
+	// eq to !inFile.eof()
+	while (inFile) {
+		jobOffer toRead;
+		readOffer(inFile, toRead);
+		if (!inFile)
+			break;
+		printOffer(toRead);
+	}
+
+	inFile.close();
+}
+
+void runSystem(const char* filePath = FILE_PATH) {
+	bool running = true;
+	while (running) {
+		char c;
+		std::cin.get(c);
+
+		switch (c) {
+		case 'a':
+			flushStream();
+			addOffers(filePath, 1);
+			break;
+		case 'f':
+			long long salary;
+			std::cin >> salary;
+			filterOffers(filePath, salary);
+			break;
+		case 's':
+			flushStream();
+			char name[MAX_LENGTH];
+			std::cin.getline(name, MAX_LENGTH, '\n');
+			if (searchOffer(filePath, name))
+				std::cout << "Offer exist\n";
+			else
+				std::cout << "No such offer\n";
+			break;
+		case 'q':
+			running = false;
+			break;
+		case 'i':
+			printAll(filePath);
+			break;
+		default:
+			break;
+		}
+	}
+}
+
+int main() {
+	runSystem();
+}