main.cpp

// invat_pt_scris.cpp : Defines the entry point for the console application.
//
#include <iostream>
#include <string>
#include <vector>
#include <assert.h>
using namespace std;

class DuplicatedIDException {
private:
	string msg;
public:
	DuplicatedIDException(string msg)
	{
		this->msg = msg;
	}
	string getMessage()
	{
		return this->msg;
	}
};


class Payable
{
private:
	string ID;
public:
	Payable(string id) {
		this->ID = id;
	}
	string getId() {
		return this->ID;
	}

	virtual float monthlyIncome()=0;

	void toString() {
		cout << this->ID << " " << monthlyIncome()<<endl;
	}
};

class Student: public Payable {
private:
	float scolarship;
public:
	Student(string id, float scolarship) :Payable(id)
	{
		this->scolarship = scolarship;
	}

	float monthlyIncome() {
		return this->scolarship;
	}
 };

class Teacher :public Payable {
private:
	float salary;
public:
	Teacher(string id, float salary) :Payable(id) {
		this->salary = salary;
	}
	float monthlyIncome() {
		return this->salary;
	}
};

class University {
private:
	string name;
	vector<Payable> payables;
public:
	University(string name) {
		this->name = name;
	}
	void addPayable(Payable &p1)
	{
		for (Payable &p2 : this->payables) {
			if (p1.getId().compare(p2.getId()) == 0)
			{
				throw DuplicatedIDException("Already exists!");
			}
		}
		this->payables.push_back(p1);
	}
	Payable &findPayableById(string id)
	{
		for (Payable &p : this->payables) {
			if (id.compare(p.getId()) == 0)
			{
				return p;
			}
		}
	}
	vector<Payable> getAllPayables() {
		return this->payables;
	}

	float totalAmountToPay() {
		float sum=0;
		for (Payable &p : this->payables) {
			sum += p.monthlyIncome();
		}
		return sum;
	}

};

int main() {
	
	University university("Babes");
	university.addPayable(Student("S1", 10));
	university.addPayable(Student("S2", 10));
	university.addPayable(Student("S3", 10));
	assert(university.getAllPayables().size() == 3);

	try {
		university.addPayable(Student("S3",20));
		assert(false);
	}
	catch (DuplicatedIDException ex)
	{
		assert(true);
	}
	
	university.addPayable(Teacher("abc", 20));

	for (Payable payable : university.getAllPayables())
	{
		payable.toString();
	}
	int b;
	cin >> b;


}