#include <iostream>
#include <ctime>
#include <sstream>

using namespace std;

int s, r, i, poz, p, sum1, sum2, miinR, rind = 0, miin, maax, maxR, minR;
float a;
string b, si;
int x[4][4], f[4], h[4];

void arrayF() // masiva aizpilde
{
    srand(time(0));
    p = 0;
    cout << "How to fill array auto  or manually" << endl;
    do
    {
        cout << "1 = auto, 2 = manually" << endl;
        cin >> b;
        stringstream be(b);
        be >> a;
        if (a == 1)
        {
            cout << "Array auto fill" << endl;
            for (r = 0; r < 4; r++)
            {
                for (i = 0; i < 4; i++)
                {
                    x[r][i] = rand() % 30 - 20;
                }
            }
            p = 1;
        }

        if (a == 2)
        {
            cout << "Array manual fill" << endl;
            for (r = 0; r < 4; r++)
            {
                for (i = 0; i < 4; i++)
                {
                    cin >> s;
                    x[r][i] = s;
                    s = 0;
                }
            }
            p = 1;
        }
    } while (p == 0);
}

int main()
{
    arrayF();
    system("cls");
    cout << "\n1uzd" << endl; //1uzd
    cout << "\nArray of 16  ";
    cout << endl
         << endl;
    for (r = 0; r < 4; r++)
    {
        for (i = 0; i < 4; i++)
        {
            if (x[r][i] > 0)
                poz = poz + 1;
            cout << "\t" << x[r][i];
        }
        cout << "\n\n";
    }
    cout << "\nPozitivo skaitlu daudzums = " << poz << endl;
    cout << endl;

    system("pause");
    system("cls");
    arrayF();
    system("cls");

    cout << "\n2uzd" << endl; //2uzd
    cout << "\nArray of 16 ";
    cout << endl
         << endl;

    for (r = 0; r < 4; r++)
    {
        for (i = 0; i < 4; i++)
        {
            if (i == 1)
            {
                sum1 = sum1 + x[r][i];
                f[r] = x[r][i];
            }
            if (i == 3)
            {
                sum2 = sum2 + x[r][i];
                h[r] = x[r][i];
            }
            cout << "\t" << x[r][i];
        }
        cout << "\n\n";
    }

    cout << "\n Even sum (2) = ";
    for (i = 0; i < 4; i++)
    {
        if (f[i] < 0 && i == 3)
            cout << "(" << f[i] << ") = ";
        if (f[i] > 0 && i == 3)
            cout << f[i] << " = ";
        if (f[i] < 0 && i < 3)
            cout << "(" << f[i] << ") + ";
        if (f[i] >= 0 && i < 3)
            cout << f[i] << " + ";
    }
    cout << sum1 << endl;
    cout << endl;

    cout << "\n Even sum (4) = ";
    for (i = 0; i < 4; i++)
    {
        if (h[i] < 0 && i == 3)
            cout << "(" << h[i] << ") = ";
        if (h[i] > 0 && i == 3)
            cout << h[i] << " = ";
        if (h[i] < 0 && i < 3)
            cout << "(" << h[i] << ") + ";
        if (h[i] >= 0 && i < 3)
            cout << h[i] << " + ";
    }
    cout << sum2 << endl;
    cout << endl;

    system("pause");
    system("cls");
    arrayF();
    system("cls");

    cout << "\n3uzd" << endl; //3uzd
    cout << "\nArray of 16 " << endl;
    cout << endl;
    for (r = 0; r < 4; r++)
    {
        cout << r + 1 << ")";
        miinR = x[r][0];
        for (i = 0; i < 4; i++)
        {
            cout << "\t" << x[r][i];
            if (x[r][i] < miinR)
            {
                miinR = x[r][i];
            }
        }
        cout << "\tSmallest =" << miinR;
        cout << "\n\n";
    }
    cout << endl;

    system("pause");
    system("cls");
    arrayF();
    system("cls");

    poz = 0;

    cout << "\n4uzd" << endl; //4uzd
    cout << "\nArray of 16 " << endl;
    cout << endl;
    for (r = 0; r < 4; r++)
    {
        poz = 0;
        cout << r + 1 << ")";
        for (i = 0; i < 4; i++)
        {
            cout << "\t" << x[r][i];
            if (x[r][i] > 0)
                poz = poz + 1;
        }
        cout << "\n\n";
        if (poz == 4 && rind == 0)
        {
            rind = r + 1;
        }
    }
    cout << "\nPositive line = " << rind << endl;
    cout << endl;

    system("pause");
    system("cls");
    arrayF();
    system("cls");

    cout << "\n5uzd" << endl; //5uzd
    cout << "\nArray of 16 before swap " << endl;
    cout << endl;
    miin = maax = x[0][0];
    minR = maxR = 1;
    for (r = 0; r < 4; r++)
    {
        cout << r + 1 << ")";
        for (i = 0; i < 4; i++)
        {
            cout << "\t" << x[r][i];
            if (x[r][i] < miin)
            {
                miin = x[r][i];
                minR = r + 1;
            }
            if (x[r][i] > maax)
            {
                maax = x[r][i];
                maxR = r + 1;
            }
        }
        cout << "\n\n";
    }
    cout << "\nSmallest number =  " << miin << "\tSmallest number line = " << minR << endl;
    cout << "\nBiggest number =  " << maax << "\tBiggest number line = " << maxR << endl;
    for (i = 0; i < 4; i++)
    {
        swap(x[maxR - 1][i], x[minR - 1][i]);
    }
    cout << "\nArray of 16 after swap " << endl;
    cout << endl;
    for (r = 0; r < 4; r++)
    {
        cout << r + 1 << ")";
        for (i = 0; i < 4; i++)
        {
            cout << "\t" << x[r][i];
        }
        cout << "\n\n";
    }
    cout << endl;

    system("pause");
    return 0;
}