PISMENI ISPIT - 6.2.2018. (A)

//PISMENI ISPIT - 6.2.2018. (A)

//1. zadatak --------------------------------------------------------------------------------------------------------------------------
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <math.h>
int main()
{
    int i, j, m;
    float polje[19][19];
    float asredina, zbroj = 0;

    srand((unsigned)time(NULL));

    do
    {
        scanf("%d", &m);
    } while (m < 10 || m >= 19);

    for (i = 0; i < m; i++)
    {

        for (j = 0; j < m; j++)
        {
            polje[i][j] = -5 + (float)rand() / RAND_MAX * 10;
        }
    }

    for (i = 0; i < m; i++)
    {

        for (j = 0; j < m; j++)
        {
            zbroj += polje[i][j];
        }

        asredina = zbroj / m;
        if (polje[i][i] > asredina)
        {
            polje[i][i] = 1;
        }
        else
            polje[i][i] = 0;

        zbroj = 0;
        asredina = 0;
    }

    for (i = 0; i < m; i++)
    {
        for (j = 0; j < m; j++)
        {
            printf("%.2f\t", polje[i][j]);
        }
        printf("\n");
    }
    return 0;
}

//2. zadatak --------------------------------------------------------------------------------------------------------------------------
#include <stdio.h>

int funkcija(int p)
{
    int t, zbr = 0;
    while (p != 0)
    {
        t = p % 10;
        zbr += t;
        p = p / 10;
    }

    return zbr;
}

int main()
{
    printf("%d", funkcija(24578));

    return 0;
}

//3. zadatak --------------------------------------------------------------------------------------------------------------------------
#include <stdio.h>
#include <stdlib.h>
#include <time.h>

void funkcija(double *polje){

    int i, brojac;
    double zbroj, sred;

    for(i=0; i<120; i++){
        for(i=i+1; i<120; i++){
            zbroj += polje[i];
            brojac++;
        }
        sred = zbroj / brojac;
        polje[i] = sred;
    }

    for(i=0; i<120; i++){
        printf("%lf", polje[i]);
    }


}

int main(){

    double *polje;
    int i;
    polje = (double*)malloc(120);

    srand((unsigned)time(NULL));

    for(i=0; i<120; i++){
        polje[i] = -10 + (float)rand() / RAND_MAX * 20;

    }

    funkcija(polje);

    return 0;
}

//4. zadatak --------------------------------------------------------------------------------------------------------------------------
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <math.h>

float funkcija(float polje[])
{
    int i;
    float rez, prvi, sum = 0;

    for (i = 0; i < 29; i++)
    {
        sum += 2 * (float)pow(polje[i + 1], 2);
    }

    prvi = 10 * (float)pow(polje[0] - 1, 2);
    rez = prvi + sum;
    return rez;
}

int main()
{
    int i;
    float polje[30];
    float *pok;


    srand((unsigned)time(NULL));
    for (i = 0; i < 30; i++)
    {
        polje[i] = -1.25 + (float)rand() / RAND_MAX*(2.5);
    }
    pok = polje;

    printf("%.2f\n", funkcija(pok));

    return 0;
}