#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>

#define MAX_THREADS 5

static const int arr[5][5] = {{1, 2, 3, 4, 5},
                              {6, 7, 8, 9, 10},
                              {11, 12, 13, 14, 15},
                              {16, 17, 18, 19, 20},
                              {21, 22, 23, 24, 25}};

void* calculateRow(void* row);
int main(int argc, char** argv)
{
    pthread_t threads[MAX_THREADS] = {0};

    for (int i = 0; i < MAX_THREADS; i++)
    {
        pthread_create(&threads[i], NULL, calculateRow, (void *)&i);
    }
    for (int i = 0; i < MAX_THREADS; i++)
    {
        pthread_join(threads[i], NULL);
    }
    return 0;
}

void* calculateRow(void* row)
{
    int irow = (*(int *)row);
    int sum = 0;
    for (int i = 0; i < 5; i++)
    {
        sum += arr[irow][i];
    }
    printf("Sum of row (%d): %d\n", irow, sum);
    pthread_exit(0);
}