hi I\'m having problems getting my c program to run. It is suppose to calculate

Question

hi I'm having problems getting my c program to run. It is suppose to calculate pi using pthreads. You should be able to enter a number and then a thread will count the points entered  and store the result in a global variable. When the thread exits the parent thread will calculate and output the result of pi.  This is my code

#include <pthread.h>

#include <stdio.h>

#include <stdlib.h>

#include <math.h>

#include <time.h>

#include <string.h>

#define SEED 35791246

void *pifunction(void *pts);

#define NUMBER_OF_THREADS 1

//#define NUMBER_OF_COUNTS   

/* global variable */

double result = 0;

int main (int argc, const char * argv[]) {

int number_of_pts = 0;

int i;

printf("Enter the number of random points: ");

scanf("%d", number_of_pts);

pthread_t pts_create[NUMBER_OF_THREADS];

for (i = 0; i < NUMBER_OF_THREADS; i++)

pthread_create(&pts_create[i], 0, pifunction, &number_of_pts);

for (i = 0; i < NUMBER_OF_THREADS; i++)

pthread_join(pts_create[i],NULL);

printf("The estimation of pi is: ",result);

return 0;

}

void *pifunction(void *pts)

{

int points;

points = *((int *)pts);

double x;

double y;

double z;

int i;

/* initialize random numbers */

   srand(SEED);

   int count=0;

   for (i=0; i<points; i++)

   {

      x = (double)rand()/RAND_MAX;

      y = (double)rand()/RAND_MAX;

      z = x*x+y*y;

      if (z<=1) count++;

   }

   result=(double)count/points*4;

pthread_exit(0);

}

Explanation / Answer

check my ans at

http://codepad.org/fQ2UAXPL

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