Задача с бири за if else 3a група

#include <iostream>
using namespace std;

int main()
{
    int broi_biri;
    double cena_bira, suma_djob;

    cout << "Programa za hodene na bar 1.0" << endl;

    cout << "Vyvedi sumata v djoba ti ";
    cin >> suma_djob;

    cout << "Vyvedi cena na edna bira ";
    cin >> cena_bira;

    cout << "Kolko biri shte izpiesh ";
    cin >> broi_biri;

    if ( broi_biri * cena_bira  <= suma_djob )
    {
        cout << "Shte poharchish " << broi_biri * cena_bira;
        cout << " leva i shte ti ostane resto ";
        cout << suma_djob - broi_biri * cena_bira << " leva." << endl;
    }
    else
    {
        cout << "Ne ti stigat parite, trqbvat ti " << broi_biri * cena_bira;
        cout << " leva, obadi se na tati da dade oshte ";
        cout << broi_biri * cena_bira - suma_djob << " leva." << endl;

        if (cena_bira <= suma_djob)
        {
            cout << "Vse pak mozhesh da izpiesh ";
            cout << int(suma_djob / cena_bira) << " biri";
            cout << " i shte ti ostane resto ";
            cout << suma_djob - int(suma_djob / cena_bira) * cena_bira << " leva." << endl;
        }
    }
}