/**
 * Solution to exercise 4.22
 *
 * Operating System Concepts - Tenth Edition
 * Copyright John Wiley & Sons, 2018.
 */

#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>

/* the list of integers */
int *list;

/* the threads will set these values */
double average;
int maximum;
int minimum;

void *calculate_average(void *param);
void *calculate_maximum(void *param);
void *calculate_minimum(void *param);

int main(int argc, char *argv[])
{
    int i;
    int num_of_args = argc - 1;

    /* allocate memory to hold array of integers */
    list = malloc(sizeof(int) * num_of_args);

    for (i = 0; i < num_of_args; i++)
        list[i] = atoi(argv[i + 1]);

    /* create the threads */
    calculate_average(&num_of_args);
    calculate_maximum(&num_of_args);
    calculate_minimum(&num_of_args);

    printf("The average is %f\n", average);
    printf("The maximum is %d\n", maximum);
    printf("The minimum is %d\n", minimum);

    return 0;
}

void *calculate_average(void *param)
{
    int count = *(int *)param;
    int i, total = 0;

    printf("count = %d\n", count);
    for (i = 0; i < count; i++)
        printf("%d\n", list[i]);

    for (i = 0; i < count; i++)
        total += list[i];

    average = total / count;
}

void *calculate_maximum(void *param)
{
    int count = *(int *)param;
    int i;

    maximum = list[0];

    for (i = 1; i < count; i++)
        if (list[i] > maximum)
            maximum = list[i];
}

void *calculate_minimum(void *param)
{
    int count = *(int *)param;
    int i;

    minimum = list[0];

    for (i = 1; i < count; i++)
        if (list[i] < minimum)
            minimum = list[i];
}