6. Phone donations

#include <iostream>
#include <cstring>

using namespace std;


class MyException {
protected:
    char message[50];
public:
    MyException(){}
    MyException(char *msg)
    {
        strcpy(message,msg);
    }
    void print()
    {
        cout<<message<<endl;
    }
};


class DonationNumber {
    static float balance;
    static int donations;
    char phoneNumber[15];
public:
    DonationNumber()
    {
        strcpy(phoneNumber,"");
    }
    DonationNumber(char *nr)
    {
        strcpy(phoneNumber,nr);
    }
    void setPhoneNumber(char *nr)
    {
        strcpy(phoneNumber,nr);
    }
    void acceptDonation(float amount)
    {
        if(amount>=0)
        {
            balance+=amount;
            donations++;
        }
        else
            throw MyException("Exception: Invalid donation amount");
    }
    static void state()
    {
        cout<<"Balance: "<<balance<<", number of donations: "<<donations<<endl;
    }
};


class User{
    char phoneNumber[15];
    float balance;
public:
    User()
    {
        strcpy(phoneNumber,"");
        balance=0;
    }
    User(char *number, float b)
    {
        strcpy(phoneNumber,number);
        balance=b;
    }
    void setPhoneNumber(char *number)
    {
        strcpy(phoneNumber,number);
    }
    void setBalance(float b)
    {
        balance=b;
    }
    void donate(DonationNumber &nr, float amount)
    {
        try
        {
            if(balance>=amount)
            {
                balance-=amount;
                nr.acceptDonation(amount);
                cout<<"Donated "<<amount<<" denars!"<<endl;
            }
            else
                throw MyException("Not enough credit for donation!");
        }
        catch(MyException exc)
        {
            exc.print();
        }
    }
};


/*

Your code here!!!

*/

float DonationNumber::balance=0;
int DonationNumber::donations=0;

int main(){
    int d, k, t;
    char tb[15];

    float s, b;

    DonationNumber broevi[3];
    User korisnici[10];

    cin>>d;

    for (int i=0; i<d; i++){
        cin>>tb;
        broevi[i].setPhoneNumber(tb);
    }
    cin>>d;
    for (int i=0; i<d; i++){
        cin>>tb;
        cin>>b;
        korisnici[i].setPhoneNumber(tb);
        korisnici[i].setBalance(b);
    }

    while (true){
        cin>>t;
        if (t==-1){
            break;
        }
        cin>>k;
        cin>>s;
        korisnici[k].donate(broevi[k], s);
        DonationNumber::state();
    }

    return 0;
}