djelioci, prosti faktori, prosti blizanci, prosti brojevi

#include <iostream>
#include <vector>

bool Prost(int broj)
{
    int counter(0);
    for(int i = 1; i<=broj; i++)
    {
        if(broj % i == 0)
            counter++;
    }
    if(counter == 2)
        return true;
    return false;
}

std::vector<int> ProstiBrojevi(int n)
{
    int counter(0), pocetni(2);
    std::vector<int> rez;
    while(counter < n)
    {
        if(Prost(pocetni))
        {
            rez.push_back(pocetni);
            counter++;
        }
        pocetni++;
    }
    return rez;
}

std::vector<int> ProstiBrojeviBlizanci(int n)
{
    int counter(0), pocetni(2);
    std::vector<int> rez;
    while(counter < n)
    {
        if(Prost(pocetni) && Prost(pocetni+2))
        {
            rez.push_back(pocetni);
            rez.push_back(pocetni+2);
            counter++;
            pocetni+=2;
        }
        pocetni++;
    }
    return rez;
}

std::vector<int> ProstiFaktori(int n)
{
    std::vector<int> rez;
    if(n == 1)
        rez.push_back(n);
    else
    {
        int a(n), b;
        int c(a%2);
        while(c == 0)
        {
            b = a/2;
            rez.push_back(2);
            a = b;
            c = a%2;
        }
        for(int i(3); i<=a; i=i+2)
        {
            int c(a%i);
            while(c == 0)
            {
                b = a/i;
                rez.push_back(i);
                a = b;
                c = a%i;
            }
        }
    }
    return rez;
}

std::vector<int> Djelioci(int n)
{
    std::vector<int> rez;
    for(int i(1); i<=n; i++)
    {
        if(n % i == 0)
            rez.push_back(i);
    }
    return rez;
}

int main()
{
    std::vector<int> v1 = ProstiBrojevi(5);
    for(unsigned int i(0); i < v1.size(); i++)
        std::cout << v1[i] << " ";
    std::cout << std::endl;
    v1 = ProstiBrojeviBlizanci(3);
    for(unsigned int i(0); i < v1.size(); i++)
        std::cout << v1[i] << " ";
    std::cout << std::endl;
    v1 = ProstiFaktori(178);
    for(unsigned int i(0); i < v1.size(); i++)
        std::cout << v1[i] << " ";
    std::cout << std::endl;
    v1 = Djelioci(81);
    for(unsigned int i(0); i < v1.size(); i++)
        std::cout << v1[i] << " ";
    std::cout << std::endl;
    return 0;
}