students

main.cpp

#include <iostream>
#include <vector>

using namespace std;

class Student
{
private:
	int age, score;
	string name;

public:
	int getAge()
	{
		return this->age;
	}

	bool setAge(int age)
	{
		if (age < 16)
			return false;
		this->age = age;
		return true;
	}

	int getScore()
	{
		return this->score;
	}

	bool setScore(int score)
	{
		if (score < 0)
			return false;
		this->score = score;
		return true;
	}

	string getName()
	{
		return this->name;
	}

	bool setName(string name)
	{
		if (name.size() == 0)
			return false;
		this->name = name;
		return true;
	}

	void show()
	{
		cout << "Name: " << this->name << endl
		     << "Age: " << this->age << endl
		     << "Score: " << this->score << endl;
	}
};

class School
{
private:
	vector<Student> students;

public:
	void addStudent(Student stu)
	{
		this->students.push_back(stu);
	}

	Student* searchByName(string name)
	{
		for (Student stu : this->students) {
			if (stu.getName() == name) {
				return new Student(stu);
			}
		}
		return NULL;
	}

	Student maxScore()
	{
		int max = -1;
		Student maxStu;

		for (Student stu : this->students) {
			if (stu.getScore() >= max) {
				max = stu.getScore();
				maxStu = stu;
			}
		}

		return maxStu;
	}

	void sortByScore()
	{
		int stulen = this->students.size();

		for (int i = 0; i < stulen; i++) {
			for (int j = 0; j < stulen; j++) {
				if (this->students[i].getScore() > this->students[j].getScore()) {
					Student tmp = this->students[i];
					this->students[i] = this->students[j];
					this->students[j] = tmp;
				}
			}
		}
	}

	void showAll()
	{
		for (Student stu : this->students) {
			stu.show();
		}
	}
};

int main()
{
	School sch;

	int n;
	cout << "Enter number of students: ";
	cin >> n;

	for (int i = 0; i < n; i++) {
		int num;
		string name;
		Student stu;

		cout << "Enter name: ";
		cin >> name;
		if (!stu.setName(name)) {
			cout << "Invalid name! Try again." << endl;
			i--;
			continue;
		}

		cout << "Enter age: ";
		cin >> num;
		if (!stu.setAge(num)) {
			cout << "Invalid age! Try again." << endl;
			i--;
			continue;
		}

		cout << "Enter name: ";
		cin >> num;
		if (!stu.setScore(num)) {
			cout << "Invalid score! Try again." << endl;
			i--;
			continue;
		}

		sch.addStudent(stu);
	}
	

	string name;
	cout << "Search by name: ";
	cin >> name;
	try {
		sch.searchByName(name)->show();
	} catch (exception e) {
		cout << "Student " << name << " not found" << endl;
	}

	cout << "Max score:" << endl;
	sch.maxScore().show();

	cout << "Sort all students:" << endl;
	sch.sortByScore();
	sch.showAll();

	return 0;
}