Звучници

#include <iostream>
#include <cstring>
using namespace std;

class Speaker
{
    protected:
    float moknost;
    char model [100];
    bool pojacalo;
    float cena;
    static int DDV;
    public:

    Speaker(float mok=0.0,const char *mod="",bool p=false,float c=0.0)
    {
        moknost=mok;
        strcpy(model,mod);
        pojacalo=p;
        cena=c;
    }
    virtual float presmetajCena()
    {
        return cena;
    }
    bool getP ()
    {
        return pojacalo;
    }
    bool operator > (Speaker &s)
    {
        return presmetajCena()>s.presmetajCena();
    }
    friend ostream& operator << (ostream &x,Speaker &s)
    {
        if(s.pojacalo)
        x <<s.model<<' '<<"ima pojachalo"<<' '<<s.presmetajCena();
        else
        x <<s.model<<' '<<"nema pojachalo"<<' '<<s.presmetajCena();
        return x;
    }
    static void smeniDDV(int ddv)
    {
        DDV=ddv;
    }
    int getDDV()
    {
        return DDV;
    }
    static void vkupnoDDV(Speaker **s,int n)
    {
        float vkupnoCena=0;
        float vkupnoDDV=0;
        for(int i=0; i<n; i++)
        {
            vkupnoCena+=s[i]->presmetajCena();
            vkupnoDDV+=s[i]->presmetajCena()*s[i]->getDDV()/100;
        }
        cout<<"Vkupna cena: "<<vkupnoCena<<endl;
    cout<<"Vkupno DDV: "<<vkupnoDDV<<endl;
    }
};
int Speaker::DDV = 18;
class TowerSpeaker : public Speaker
{
    bool stolb;
    public:
    TowerSpeaker (float mok=0.0,const char *mod="",bool p=false,float c=0.0,bool s=true)
    : Speaker(mok,mod,p,c)
    {
        stolb=s;
    }
    float presmetajCena()
    {
        float k=0;
        if(Speaker::getP()&&stolb)
            return Speaker::presmetajCena() * 1.15;
        if(Speaker::getP())
            return Speaker::presmetajCena() * 1.10;
        if(stolb)
            return Speaker::presmetajCena() * 1.05;
        else return Speaker::presmetajCena();

    }
};
class MonitorSpeaker : public Speaker
{
    bool namena;
    public:
    MonitorSpeaker (float mok=0.0,const char *mod="",bool p=false,float c=0.0,bool n=true)
    : Speaker(mok,mod,p,c)
    {
        namena=n;
    }
    float presmetajCena()
    {
        float k=0;
        if(Speaker::getP()&&namena)
            return Speaker::presmetajCena() * 1.25;
        if(Speaker::getP())
            return Speaker::presmetajCena() * 1.10;
        if(namena)
            return Speaker::presmetajCena() * 1.15;
        else return Speaker::presmetajCena();
    }
};
void lowestPrice(Speaker **s,int n)
{
    int min=s[0]->presmetajCena(),index;
    for(int i=1; i<n; i++)
    {
        if(min>s[i]->presmetajCena())
        {
            min=s[i]->presmetajCena();
            index=i;
        }
    }
    cout<<*s[index];
}
int main() {
    int testCase;
    cin >> testCase;
    float power;
    char model[100];
    bool amp;
    float price;
    bool fullSemi;
    if(testCase == 1) {
        cout << "===== TESTING CONSTRUCTORS ======" << endl;
        cin >> power;
        cin >> model;
        cin >> amp;
        cin >> price;
        cin >> fullSemi;
        TowerSpeaker ts(power, model, amp, price, fullSemi);
        cout << ts << endl;
        cin >> power;
        cin >> model;
        cin >> amp;
        cin >> price;
        cin >> fullSemi;
        MonitorSpeaker ms(power, model, amp, price, fullSemi);
        cout << ms << endl;

    } else if(testCase == 2) {
        cout << "===== TESTING LOWEST PRICE ======" << endl;
        int n;
        cin >> n;
        Speaker** speakers = new Speaker*[n];
        for(int i = 0; i < n; ++i) {
            cin >> power;
            cin >> model;
            cin >> amp;
            cin >> price;
            cin >> fullSemi;
            if(i % 2 == 1)
                speakers[i] = new TowerSpeaker(power, model, amp, price, fullSemi);
            else
                speakers[i] = new MonitorSpeaker(power, model, amp, price, fullSemi);
        }

        lowestPrice(speakers, n);
        for(int i = 0; i < n; ++i) {
            delete speakers[i];
        }
        delete [] speakers;
    } else if(testCase == 3) {
        cout << "===== TESTING DDV STATIC ======" << endl;
        int n;
        cin >> n;
        Speaker** speakers = new Speaker*[n];
        for(int i = 0; i < n; ++i) {
            cin >> power;
            cin >> model;
            cin >> amp;
            cin >> price;
            cin >> fullSemi;
            if(i % 2 == 1)
                speakers[i] = new TowerSpeaker(power, model, amp, price, fullSemi);
            else
                speakers[i] = new MonitorSpeaker(power, model, amp, price, fullSemi);
        }
        Speaker::vkupnoDDV(speakers, n);
        int ddv;
        cin >> ddv;
        Speaker::smeniDDV(ddv);
        Speaker::vkupnoDDV(speakers, n);
        for(int i = 0; i < n; ++i) {
            delete speakers[i];
        }
        delete [] speakers;
    }

}