WDP - zaliczenie do laborków

main.c

#include <stdio.h>
#include <stdlib.h>
#define TAB_LENGTH 8

// zadanie 4
double max_value(double tab[]) {
    double result = -1;

    for (int i = 0; i < TAB_LENGTH; i++) {
        double current_value = tab[i];
        if (current_value > 0 && current_value > result) {
            result = current_value;
        }
    }

    if (result == -1) {
        printf("\n nie znaleziono dodatniego elementu w tablicy\n");
    }

    return result;
}

// zadanie 5
double average(double tab[]) {
    double current_sum = 0;
    int current_elements = 0;

    for (int i = 0; i < TAB_LENGTH; i++) {
        double current_value = tab[i];

        if ((int)current_value % 2 == 0) {
            current_sum += current_value;
            current_elements ++;
        }
    }

    return current_sum / (double) current_elements;
}

// zadanie 6
int amount_of_specified(double tab[]) {
    int result = 0;

    for (int i = 0; i < TAB_LENGTH; i++) {
        double current_value = tab[i];

        if (current_value > 5 && (int)current_value % 2 == 0) {
            result ++;
        }
    }

    return result;
}

// zadanie 7
double *add_to_all(double tab[], double value) {
    static double result[TAB_LENGTH];

    for (int i = 0; i < TAB_LENGTH; i++) {
        double current_value = tab[i];
        result[i] = current_value + value;
    }

    return result;
}

// funkcja pomocnicza
void dump(double tab[]) {
    for (int i = 0; i < TAB_LENGTH; i++) {
        printf("\ttab[%d] = %lf\n", i, tab[i]);
    }
}

int main()
{
    printf("1. Deklaracja tablicy\n");
    double tab[TAB_LENGTH];
    printf("\n====================================\n");

    printf("2. Wczytanie wartosci\n");
    for (int i = 0; i < TAB_LENGTH; i++) {
        printf("\tPodaj wartosc dla tab[%d]: ", i);
        scanf("%lf", &tab[i]);
    }
    printf("\n====================================\n");

    printf("3. Wyswietlic wczytane dane: \n");
    dump(tab);
    printf("\n====================================\n");

    printf("4. Najwiekszy element w tablicy: %lf\n", max_value(tab));
    printf("5. Srednia parzystych elementow w tablicy: %lf\n", average(tab));
    printf("6. Liczba elementow wiekszych od 5, podzielnych przez 2: %d\n", amount_of_specified(tab));

    printf("7. Dodanie okreslonej wartosci do wszystkich elementow w tablicy: \n");
    double* result = add_to_all(tab, 4.5);
    dump(result);

    return 0;
}