12. Savarankiško darbo užduotys 1, 2, 8.

#include <cstdlib>
#include <iostream> // Input output stream
#include <ctime>    // for random number generation
#include <stdio.h>  // printf library
#include <string>
#include <limits>   // cin.ignore(numeric_limits<streamsize>::max(),'\n');
#include <fstream>  // File input and output.
#include <cmath>    // pow.
#include <iomanip>

using namespace std;

// Dvimacio masyvo dydis. x = y - kvadratine matrica
const int XMax = 5;
const int YMax = 5;

// Funkciju prototipai
void randGenerator(int mas [] [YMax], int sizeX, int sizeY);
void printOut(int mas [] [YMax], int sizeX, int sizeY);
void zeroColumn(int mas [] [YMax], int sizeX, int sizeY);
void iSuma(int mas [] [YMax], int sizeX, int sizeY);
void horizontalSwitch(int mas [] [YMax], int sizeX, int sizeY);

// Pagrindine programa
int main(int argc, char *argv[])
{
    // Randomiser initializing
    srand(time(NULL));

    // Array initializing
    int dMas [XMax] [YMax];
    int mas [2] [2] = {{1, 2}, {3, 4}};

    // Binary generator;
    randGenerator(dMas, XMax, YMax);

    // Display to console.
    printOut(dMas, XMax, YMax);

    // 1. Zero column
    zeroColumn(dMas, XMax, YMax);

    // 2. Pagr. istrizaine
    iSuma(dMas, XMax, YMax);

    // 8. Horizontalios asies sukeitimas
    horizontalSwitch(dMas,XMax, YMax);
    printOut(dMas, XMax, YMax);

    cout << " " << endl;
    //system ("PAUSE");
    //return EXIT_SUCCESS;
    return 0;
}

// Funkcijos
void randGenerator(int mas[] [YMax], int sizeX, int sizeY)
{
    for (int i = 0; i < sizeX; i++)
    {
        for (int j = 0; j < sizeY; j++) {
            //mas [i] [j] = rand() % 2; // 0 or 1
            mas [i] [j] = -5 + (rand() %(10 + 1)); // from -5 to 5
            }
    }
}

void printOut(int mas [] [YMax], int sizeX, int sizeY)
{
    for (int i = 0; i < sizeX; i++)
    {
        for (int j = 0; j < sizeY; j++)
            cout << setw(2) << mas [i] [j] << " ";
        cout << endl;
    }
    cout << endl;
}

void zeroColumn(int mas [] [YMax], int sizeX, int sizeY)
{
    bool emptyC = false;
    int C = 0;
    int kuris;

    for (int i = 0; i < sizeY; i++)
    {
        for (int j = 0; j < sizeX; j++)
        {
            if (mas [j] [i] == 0)
                C++;
            kuris = i;
        }

        if (C == sizeX)
        {
            emptyC = true;
            break;
        }

        C = 0;
    }

    if (emptyC) cout << "Yra stulpelis tik su nuliais : " << kuris+1 << endl;

}

void iSuma(int mas [] [YMax], int sizeX, int sizeY)
{
    int suma = 0;
    int sandg = 1;
    int counter = 0;
    if (sizeX == sizeY)
    {
        for (int i = 1; i < sizeX; i++)
        {
            for (int j = 0; j < i; j++)
            {
                if (mas [i] [j] > 0)
                    suma += mas [i] [j];
            }
        }
        cout << "Teigiamu elementu, esanciu po pagrindine istrizaine suma : " << suma << endl << endl;
    }
    else cout << "Masyvas ne kvadratinis!" << endl << endl;

    if (sizeX == sizeY)
    {
        for (int i = 0; i < sizeX; i++)
        {
            for (int j = i+1; j < sizeY; j++)
            {
                if (mas [i] [j] < 0)
                {
                    sandg *= mas [i] [j];
                    counter++;
                }

            }
        }
        if (counter != 0) cout << "Neigimu elementu, esanciu virs pagrindines istrizaines sandauga : " << sandg << endl << endl;
        else cout << "Nebuvo neigiamu elementu virs pagrindines istrizaines." << endl;
    }
    else cout << "Masyvas ne kvadratinis!" << endl << endl;
}

void horizontalSwitch(int mas [] [YMax], int sizeX, int sizeY)
{
    int temp = 0;
    cout << "Horizontaliai sukeistas dvimatis masyvas" << endl;
    for (int i = 0; i < sizeX / 2; i++)
    {
        for (int j = 0; j < sizeY; j++)
        {
            temp = mas [i] [j];
            mas [i] [j] = mas [sizeX-i-1] [j];
            mas [sizeX-i-1] [j] = temp;
        }
    }
}