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

#define N 3
#define K 3

/* run this program using the console pauser or add your own getch, system("pause") or input loop */

pthread_mutex_t mutex;
int mt[K][N];


void * trfun(void *arg){
int pers= (intptr_t) arg;
printf("Persona numero: %d \n", pers+1);
pthread_mutex_lock(&mutex);
int i = 0;
int j = 0;
int z = 0;
int m[K];


	for(i=0; i<K; i++) {
		mt[pers][i] = rand()%10;
	}
	for(j=0; j<K; j++) {
		for(i=0;i<pers;i++){
			m[z] = m[z]+mt[j][i];
		}
	}

	for(i=0; i<K; i++) {
	m[z] /= pers+1;
	}

	z++;
	sleep(3);
	pthread_mutex_unlock(&mutex);

	printf("media parziale dopo compilazione utente %d\n", pers+1);

	for(i=0; i<K; i++){
		printf("%d\n", m[i]);
	}

	printf("\n");
	pthread_exit(0);
return NULL;
}
int main() {
	pthread_t tid[N];
	int i = 0;
	pthread_mutex_init(&mutex, NULL);
	for(i=0; i<N;i++)
	{
		pthread_create(&tid[i], NULL , trfun , (void *)(intptr_t)i);
	}

	for(i=0; i<N;i++)
	{
	pthread_join(tid[i], NULL);
	}

	return 0;
}