zad1

#include <pthread.h>
#include <math.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#define N 10

pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
double sum=0;
typedef struct {
int x;
int i;
}argument;

int silnia(int n) {
    if (n == 0) return 1;
    if (n == 1) return 1;
    return n*silnia(n-1);
}

void* obliczIloczyn(void* ptr)
{
    argument* arg = ptr;
    int dol = silnia(arg->i);
    double gora = pow((double)arg->x,(double)arg->i);
    //printf("gora: %f\n",gora);
    //printf("dol: %d\n",dol);
    double dziel = (double)gora / (double)dol;
    double* suma = malloc(sizeof(double));
    *suma = dziel;

    pthread_mutex_lock(&mutex);

    sum+=*suma;

    pthread_mutex_unlock(&mutex);

    printf("suma: %f\n",*suma);
    //mutex[arg->i] = (pthread_mutex_t)*suma;
}

int main()
{

    double* result[N];
    int i;
    pthread_t watki[N];
    for(i=0;i<N;i++)
    {
        argument* arg= malloc(sizeof(argument));
        arg->x = 1;
        arg->i = i;
        pthread_create(&watki[i], NULL, obliczIloczyn, arg);
        usleep(300);


    }
    for(i=0;i<N;i++)
    {
        pthread_detach(watki[i]);
    }

    printf("Wynik: %f\n",sum);
    return 0;
}