Cela 1va ispitna zadaca

#include<iostream>
using namespace std;

#include<iostream>
using namespace std;

class MaxCapacity{
private:
    char error[25];
public:
    MaxCapacity(){}
    MaxCapacity(char error[]){
    strcpy(this->error,error);
    }
    void print(){
    cout<<error<<endl;
    }
};

class SameBookException{
private:
    char error[25];
public:
    SameBookException(){}
    SameBookException(char error[]){
    strcpy(this->error,error);
    }
    void print(){
    cout<<error<<endl;
    }
};
class Kniga{
private:
    char *ime;
    int kod;
    static float evro;
    float cena;
    int godina;
    char *avtor;
public:
    Kniga(){
    // delete []avtor;
    // delete []ime;
    this->ime=new char[0];
    this->avtor=new char[0];
    }
    // constructor so 5 promenlivi
    Kniga(char *ime,int kod,float cena,int godina,char *avtor){
    // delete []ime
    this->ime=new char[strlen(ime)+1];
    strcpy(this->ime,ime);
    this->kod=kod;
    this->cena=cena;
    this->godina=godina;
    this->avtor=new char[strlen(avtor)+1];
    strcpy(this->avtor,avtor);
    }
    // constructor so 3 promenlivi
    Kniga(char *ime,int kod,float cena){
    // delete []ime
    this->ime=new char[strlen(ime)+1];
    strcpy(this->ime,ime);
    this->kod=kod;
    this->cena=cena;
    }
    // copy constructor
    Kniga(const Kniga &novaKniga){
    this->ime=new char[strlen(novaKniga.ime)+1];
    strcpy(this->ime,novaKniga.ime);
    this->kod=novaKniga.kod;
    this->cena=novaKniga.cena;
    this->godina=novaKniga.godina;
    this->avtor=new char[strlen(novaKniga.avtor)+1];
    strcpy(this->avtor,novaKniga.avtor);
    }


    Kniga &operator=(Kniga &novaKniga){
    // proverka dali se isti objektite pred da kopirame (proverka spored adresa)
    if(this != &novaKniga){
    this->ime=new char[strlen(novaKniga.ime)+1];
    strcpy(this->ime,novaKniga.ime);
    this->kod=novaKniga.kod;
    this->cena=novaKniga.cena;
    this->godina=novaKniga.godina;
    this->avtor=new char[strlen(novaKniga.avtor)+1];
    strcpy(this->avtor,novaKniga.avtor);
    }
    return *this;
    }

    // operator << (za printanje)
    friend ostream &operator<<(ostream &output, Kniga &objekt){
    output<<"Kniga: "<<objekt.ime<<" "<<objekt.kod<<" "<<objekt.cena<<" "<<objekt.godina<<" "<<objekt.avtor<<endl;
    return output;
    }

    // operator >> (za input)
    friend istream &operator>>(istream &input, Kniga &objekt){
    input>>objekt.ime;
    input>>objekt.kod;
    input>>objekt.cena;
    input>>objekt.godina;
    input>>objekt.avtor;
    return input;
    }

    bool operator<(Kniga &drugaKniga){
    if(this->godina<drugaKniga.godina){
        return true;
    }else{
        return false;
    }
    //return this->godina<drugaKniga.godina;
    }

    bool operator==(Kniga &drugaKniga){
    return this->kod==drugaKniga.kod;
    }

    void setGodina(int godina){
    this->godina=godina;
    }

    char* getAvtor(){
    return avtor;
    }

    void setAvtor(char *niza){
    avtor=new char[strlen(niza)+1];
    strcpy(avtor,niza);
    }

    int getGodina(){
    return godina;
    }

    float cenaVoEvra(){
    return cena/Kniga::evro;
    }

    void print(){
    cout<<"Kniga: "<<ime<<" "<<kod<<" "<<cena<<" "<<godina<<" "<<avtor<<endl;
    }

    static void setEvro(float novKurs){
    evro=novKurs;
    }

    float getCena(){
    return cena;
    }

    ~Kniga(){
    delete []ime;
    delete []avtor;
    }
};
float Kniga::evro=61.5;

class Biblioteka{
private:
    char ime[25];
    int kapacitet;
    Kniga *knigi;
    int brojKnigi;
public:
    Biblioteka(){
    knigi=new Kniga[0];
    brojKnigi=0;
    }

    Biblioteka(char ime[],int kapacitet){
    knigi=new Kniga[0];
    brojKnigi=0;
    strcpy(this->ime,ime);
    this->kapacitet=kapacitet;
    }


    Biblioteka &operator+=(Kniga &novaKniga){
    if(brojKnigi==kapacitet){
        throw MaxCapacity("Kapcitetot e tolku");
    }
    // testing exception
    for(int i=0;i<brojKnigi;i++){
        if(knigi[i]==novaKniga){
            throw SameBookException("Knigata veke ja imame");
        }
    }

    Kniga *tempNiza = new Kniga[brojKnigi];
    for(int i=0;i<brojKnigi;i++){
        // operator =
        tempNiza[i]=knigi[i];
    }

    knigi=new Kniga[brojKnigi+1];

    for(int i=0;i<brojKnigi;i++){
        knigi[i]=tempNiza[i];
    }

    knigi[brojKnigi]=novaKniga;
    brojKnigi++;
    delete []tempNiza;

    return *this;
    }

    void printKnigi(){
    for(int i=0;i<brojKnigi;i++){
        cout<<knigi[i];
    }
    }

    Biblioteka &operator-=(Kniga &novaKniga){
    int flag=0;
    for(int i=0;i<brojKnigi;i++){
        if(knigi[i]==novaKniga){
            flag=1;
            break;
        }
    }
    // znaeme deka go imame objektot vo nizata
    if(flag==1){
        int brojac=0;
        Kniga *tempNiza = new Kniga[brojKnigi];
        for(int i=0;i<brojKnigi;i++){
            if(knigi[i]==novaKniga){
                // go skokame toj shto e ist
            }else{
               tempNiza[brojac]=knigi[i];
               brojac++;
            }
        }
        brojKnigi--;
        knigi=new Kniga[brojKnigi];
        for(int i=0;i<brojKnigi;i++){
            knigi[i]=tempNiza[i];
        }
        delete []tempNiza;
    }
    return *this;
    }

    void print(){
    cout<<ime<<" "<<kapacitet<<endl;
    }


    int kolkuKnigiOdAvtor(char *nekojAvtor){
    int kolkuKnigi=0;
    for(int i=0;i<brojKnigi;i++){
        if(strcmp(knigi[i].getAvtor(),nekojAvtor)==0){
            kolkuKnigi++;
        }
    }
    return kolkuKnigi;
    }

    void postariKnigi(int nekojaGodina){
    int kolkuKnigi=0;
    cout<<"Knigi postari od "<<nekojaGodina<<" se:"<<endl;
    for(int i=0;i<brojKnigi;i++){
        if(knigi[i].getGodina()<nekojaGodina){
            cout<<knigi[i];
            kolkuKnigi++;
        }
    }
    }

    float vkupnaCenaVoEvra(){
    float suma=0;
    for(int i=0;i<brojKnigi;i++){
        suma+=knigi[i].cenaVoEvra();
    }
    return suma;
    }

    void daliSiteKnigiPosle(int nekojaGodina){
    int flag=1;
    for(int i=0;i<brojKnigi;i++){
        if(knigi[i].getGodina()<=nekojaGodina){
            flag=0;
            break;
        }
    }
    if(flag){
        cout<<"Site knigi se postari od "<<nekojaGodina<<endl;
    }else{
        cout<<"Site knigi NE se postari od "<<nekojaGodina<<endl;
    }
    }

    float prosecnaCenaNaKniga(){
    int brojac=0;
    float suma=0;
    for(int i=0;i<brojKnigi;i++){
        suma+=knigi[i].getCena();
        brojac++;
    }
    return suma/brojac;
    }

    ~Biblioteka(){
    delete []knigi;
    }
};

int main(){
cout<<"Testing parameter constructor"<<endl;
Kniga lotr("The lord of the rings", 111222, 1000, 1955, "R.R. Tolkien");
lotr.print();
Kniga hp("Harry Potter", 222333, 1500);
hp.setGodina(1991);
hp.setAvtor("J.K. Rowling");
hp.print();
cout<<"Testing copy constructor"<<endl;
Kniga hp2(hp);
hp2.print();
cout<<"Testing operator="<<endl;
Kniga hp3;
hp3=hp;
cout<<"Testing operator <<"<<endl;
cout<<hp3;
cout<<"Testing operator >>"<<endl;
Kniga got("GoT",333444,1750,1993,"R.R.Martin");
//cin>>got;
cout<<got;
cout<<"Testing operator <"<<endl;
if(hp<got){
    cout<<"HP<GOT"<<endl;
}else{
    cout<<"HP>GOT"<<endl;
}
cout<<"Testing operator =="<<endl;
if(hp==got){
    cout<<"HP==GOT"<<endl;
}else{
    cout<<"HP!=GOT"<<endl;
}
cout<<"Testing static"<<endl;
cout<<hp.cenaVoEvra()<<endl;
Kniga::setEvro(61.7);
cout<<hp.cenaVoEvra()<<endl;

Biblioteka bm("Brakja Miladinovci", 3);
cout<<"Testirame += operator"<<endl;
try{
bm+=hp;
bm+=got;
bm+=lotr;
bm+=hp;
}catch(SameBookException &objekt){
    objekt.print();
}catch(MaxCapacity &objekt){
    objekt.print();
}

bm.printKnigi();
cout<<"Testirame -= operator"<<endl;
bm-=hp;
bm.printKnigi();

bm.postariKnigi(1991);
cout<<"Knigi od avtorot R.R.Martin ima: "<<bm.kolkuKnigiOdAvtor("R.R.Martin")<<endl;
cout<<"Cena na site knigi vo evra e "<<bm.vkupnaCenaVoEvra()<<endl;
bm.daliSiteKnigiPosle(1950);
cout<<"Prosecna cena na kniga e "<<bm.prosecnaCenaNaKniga()<<endl;
return 0;
}