PV024RefBasics

#include <iostream>

void swapPtr(int* a, int* b)
{
    std::cout << "*a = " << *a << " *b= " << *b << '\n';
    int tmp{ *a };
    *a = *b;
    *b = tmp;
    std::cout << "*a = " << *a << " *b= " << *b << '\n';
}

void swap(int& a, int& b)
{
    std::cout << "a = " << a << " b= " << b << '\n';
    int tmp{ a };
    a = b;
    b = tmp;
    std::cout << "a = " << a << " b= " << b << '\n';
}

void calcArr(int* arr, int arrSize, int& zero, int& pos, int& neg)
{
    //for (int i{ 0 }; i < arrSize; ++i)
    //{
    //  if (arr[i] == 0) { ++(*zero); };
    //  if (arr[i] > 0) { ++(*pos); };
    //  if (arr[i] < 0) { ++(*neg); };
    //}

    while (arrSize)
    {
        if (*arr == 0) { ++zero; };
        if (*arr > 0) { ++pos; };
        if (*arr < 0) { ++neg; };

        ++arr;
        --arrSize;
    }
}

int main()
{
    int massSize{ 10 };
    int* mass{ new int[massSize]{ 0,2,1,-3,0,2,-6,-1,0,5} };

    //int arr[10]{};


    ////for (int i{ 0 }; i < massSize; ++i)
    ////{
    ////    arr[i] = mass[i];
    ////    std::cout << arr[i] << ' ';
    ////}

    //int* end{ mass + massSize };
    //int* begin{ mass };
    //int* dest{ arr };

    //while (begin < end)
    //{
    //  *dest++ = *begin++;
    //  //*dest = *begin;
    //  //++dest;
    //  //++begin;

    //  std::cout << *(dest - 1) << ' ';
    //}

    //delete[] mass;

    //return 0;

    int x{ 10 };//(100)[xxxx]
    int y{ 20 };

    const int arrSize{ 10 };
    const int* ptrI{ &arrSize };
    const int& refI{ x };




    //int n;
    //int* const ptrInt{&x};
    //


    //int& refInt{ x }; //(100)
    //refInt = 345;

    std::cout << "x = " << x << '\n';
    int zCnt{ 0 };
    int pCnt{ 0 };
    int nCnt{ 0 };

    calcArr(mass, massSize, zCnt, pCnt, nCnt);

    std::cout << "Zeros: " << zCnt
        << "\nPositives: " << pCnt
        << "\nNegatives:" << nCnt << '\n';

    std::cout << "x = " << x << " y= " << y << '\n';
    swap(x, y);
    //swapPtr(&x, &y);
    std::cout << "x = " << x << " y= " << y << '\n';

//  delete[] mass;
    return 0;
}