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


#define N 16384
#define MT	64

unsigned long int data[N];

typedef struct
{
	int sec;
	int size;
	unsigned long int *start;
	float sum;
} param;

void* new_thread(void* arg)
{
	unsigned long int i;

	printf("t: %d %d %lu\n",
		((param *)arg)->sec,
		((param *)arg)->size,
		((param *)arg)->start[0]);

	((param *)arg)->sum=0.0;

	for (i=0; i<((param *)arg)->size; i++)
		((param *)arg)->sum += (float) ((param *)arg)->start[i];

	return(NULL);
}

int main(int argc, char **argv)
{
	int nt=1;
	unsigned long int i=1;
	pthread_t tid[MT];
	param p[MT];
	float sum, total;

	if ( argc > 1 )
		nt=atoi(argv[1]);

	for(i=0; i<N; i++)
			data[i]=i;

	for (i=0, total=0.0; i<N; i++)
		total += (float) data[i];

	for(i=0; i<nt; i++)
	{
		p[i].sec=i;
		p[i].size=N/nt;
		p[i].start=&data[p[i].size*i];

		if (pthread_create(&tid[i], NULL, new_thread, (void *)&p[i]))
			fprintf(stderr,"Error: creating new thread %d\n", i);
	}

	for (i=0; i<nt; i++)
		pthread_join(tid[i], NULL);

	for (i=0, sum=0.0; i<nt; i++)
		sum += p[i].sum;

	printf("TOTAL: %f %f\n", total, sum);

	pthread_exit(NULL);
}