intarray

//intarray.hpp

//napisati klasu intArray i izvrsiti preklapanje operatora, +,=,+=,[], <<, ==, !=
#ifndef INTARRAY_DEF
#define INTARRAY_DEF
#include <iostream>
using namespace std;

class IntArray{

    private:
        int brEl; // n elemenata
        int *el; // pocetak na celobrojni niz el
    public:
        //konstruktori
        IntArray() {brEl=0; el=NULL;} //inicijalizacija
        IntArray(const int[], int); //konstruktor sa parametrima, sadrzi polja klase
        IntArray(const IntArray&); //konstruktor kopije
        ~IntArray() {delete[] el;} //sprecava se "curenje" memorije
        int lenght()const {return brEl;}
        //operatori za preklapanje
        friend bool operator==(const IntArray&, const IntArray&);
        friend bool operator!=(const IntArray&, const IntArray&);
        friend IntArray operator+(const IntArray&, const IntArray&);
        IntArray& operator+=(const IntArray&);
        IntArray& operator=(const IntArray&);
        //operatori indeksiranja
        int& operator[](int); //upisivanje na a[i]
        int operator[](int)const; //citanje sa a[i]
        friend ostream& operator<<(ostream&, const IntArray&);
};
#endif

//intarray.cpp


#include "intarray.hpp"



IntArray:: IntArray(const int ulazniNiz[], int n){ //brEl,  el
    brEl = n;
    el = new int[brEl];
        for(int i=0; i<brEl; i++)
            el[i] = ulazniNiz[i];
}


IntArray:: IntArray(const IntArray &ray){
    // koristi referencu ray! za brEl i el
    brEl = ray.brEl;
    el = new int[brEl];
        for(int i=0; i<brEl; i++)
            el[i] = ray.el[i];
}

bool operator==(const IntArray &ray1, const IntArray &ray2){
    if(ray1.brEl!=ray2.brEl) return false;
        for(int i=0; i<ray1.brEl; i++)
        if(ray1.el[i]!=ray2.el[i]) return false;
            return true;
}
bool operator!=(const IntArray &ray1, const IntArray &ray2){
        if(ray1.brEl!=ray2.brEl) return true;
        for(int i=0; i<ray1.brEl; i++)
        if(ray1.el[i]!=ray2.el[i]) return true;
            return false;
}


IntArray operator+(const IntArray &ray1, const IntArray &ray2){
        //koristi reference!! vraca se klasni tip

        IntArray tmp; //privremeni objekat
        tmp.brEl = ray1.brEl + ray2.brEl;
        tmp.el = new int[tmp.brEl];
            for(int i=0; i<ray1.brEl; i++)
                tmp.el[i] = ray1.el[i];
            for(int j=0; j<ray2.brEl; j++)
                tmp.el[ray1.brEl+j] = ray2.el[j];
                return tmp;
}

IntArray& IntArray:: operator+=(const IntArray &ray){
    //koristi referencu! vraca se referenca
    //formiraj privremeni niz
    //kombinacija
    int *tmpArray = new int [brEl + ray.brEl];
    for(int i=0; i<brEl; i++)
        tmpArray[i] = el[i];
    for(int j=0; j<ray.brEl; j++)
        tmpArray[brEl+j] = ray.el[j];

        brEl+=ray.brEl;
        delete []el;
        el = tmpArray;
        return *this;
        }


IntArray& IntArray::operator=(const IntArray &ray){
    //proveravaju se adrese objekata koji se porede a=b, a=a!!
        if(this!= &ray) {
                delete []el;
                brEl = ray.brEl;
                el = new int [brEl];

                for(int i=0; i<brEl; i++)
                el[i] = ray.el[i];

        }return *this;
}

        int& IntArray:: operator[](int i){
            return el[i];
        }
        int IntArray::operator[](int i)const{
        return el[i];
        }
        ostream& operator<<(ostream &out, const IntArray &ray){
            int i;
            for(i=0; i<ray.brEl; i++)
            out<< ray.el[i] << " ";
            return out;
        }
//main.cpp


#include "intarray.hpp"

int main(){
const int a1[] = {1,2,3};
const int a2[] = {4,5,6};
const int a3[] = {1,2,3};
IntArray a(a1,3), b(a2,3), c(a3,3);
cout<<"a: "<<a<<endl;
cout<<"b: "<<b<<endl;
cout<<"c: " <<c<<endl;


//testiranje +
cout<<"a+b: "<< (a+b)<<endl;
//testiranje +=
cout<<"a+=c: "<< (a+=c)<<endl;
//testiranje [] citanje i upis
cout<<"a[7]: "<< a[7] <<endl;
a[3] = 6100;
cout<<"a: "<<a<<endl;
//testiranje ==
cout<<"a==b?? " <<(a==b)<<endl;
//testiranje !=
cout<<"a!=b?? " <<(a!=b)<<endl;


return 0;
}