Drs lv

1.

#include "mpi.h"
#include <iostream>


using namespace std;

int main(int argc, char *argv[]) {
    int  i;
    double v[10],srednja,zbroj = 0;

    for (i = 0; i < 10; i++) {
        v[i] = (i + 0.2) * (-1);
    }

    cout << "Vektor: ";
    for (i = 0; i < 10; i++){
        cout << v[i]<<" ";
    }

    #pragma omp parallel for reduction(+:zbroj)
        for(i=0; i <= 10;i++) {
                    zbroj = zbroj+ v[i];
                }

    cout << "\nZbroj: " << zbroj;
    srednja = zbroj / 10;
    cout << "\nSrednja vrijednost: " << srednja;

}




2.


#include "mpi.h"
#include <iostream>

using namespace std;

int main(int argc, char *argv[]) {
    int i, j;
    double v[5], m[5][5];
    double zbroj = 0;
    double rez[5];

    for (i = 0; i < 5; i++) {
        v[i] = i + 1;
    }

    cout << "Vektor: ";
    for (i = 0; i < 5; i++) {
        cout << v[i] << " ";
    }

    for (i = 0; i < 5; i++) {
        for (j = 0; j < 5; j++) {
            m[i][j] = i + j + 1 ;
        }
    }

    cout << "\nMatrica:\n";
    for (i = 0; i < 5; i++) {
        for (j = 0; j < 5; j++) {
            cout << m[i][j] << "\t";
        }
        cout << "\n";
    }

    #pragma omp parallel for //reduction(+:zbroj)
    for (i = 0; i < 5; i++) {
            for (j = 0; j < 5; j++) {

                rez[i] =  rez[i] + v[j]*m[i][j];

            }
        }


    cout << "\nUmnozak: (valjda)\n";
    for ( i = 0; i < 5; i++){
        cout << rez[i] << " ";
    }



    }


3.







#include "mpi.h"
#include <iostream>

using namespace std;

int main(int argc, char *argv[]) {
    int i, j;
    double v[5][5], m[5][5];
    double zbroj = 0;
    double rez[5][5];

    for (i = 0; i < 5; i++) {
            for (j = 0; j < 5; j++) {
                m[i][j] = i + j + 1 ;
                rez[i][j] = 0;
            }
        }

    cout << "Prva matrica:\n ";
    for (i = 0; i < 5; i++) {
            for (j = 0; j < 5; j++) {
                cout << m[i][j] << "\t";
            }
            cout << "\n";
        }

    for (i = 0; i < 5; i++) {
        for (j = 0; j < 5; j++) {
            v[i][j] = i + j + 1 ;
        }
    }

    cout << "\nDruga matrica:\n";
    for (i = 0; i < 5; i++) {
        for (j = 0; j < 5; j++) {
            cout << v[i][j] << "\t";
        }
        cout << "\n";
    }

    #pragma omp parallel for //reduction(+:zbroj)
    for (i = 0; i < 5; i++) {
            for (j = 0; j < 5; j++) {
                for (int k = 0; k < 5; k++){
                rez[i][j] =  rez[i][j] + v[i][k]*m[k][j];
                }
            }
        }


    cout << "\nUmnozak: (valjda)\n";
    for (i = 0; i < 5; i++) {
        for (j = 0; j < 5; j++) {
            cout << rez[i][j] << "\t";
        }
        cout << "\n";
    }
}