#include <stdio.h>
#include <stdarg.h>
#include <time.h>
#define NINT 1000000000

int main(void);
void adder(int *, int *, double *, double *);

int main ()
/* This program calculates the variance of the first 10^9 integers     */
/* using both cpus on the dual processor Macintosh.                    */
/* To compile with the Absoft C compiler, use:                         */
/* acc -A -O adder.c MacMP.c "{SharedLibraries}"MPLibrary -o adder.out */
{
int n=NINT, start=0;
clock_t start_program, end_program;
double sum1, sum2, mean, mesq;
start_program = clock ();

adder (&n, &start, &sum1, &sum2);

mean = sum1 / n;
mesq = sum2 / n;

printf("%15d %20.3f %20.3f\n", n, mean, mesq - (mean * mean));

end_program = clock ();
printf("\ntime in sec: %7.2f\n", (end_program-start_program)/60.);
return 1;
}



void
adder (int *n, int *start, double *s1, double *s2)
{
int i;
double ls1 = 0.0, ls2 = 0.0;
for (i=(*start);i<(*n);i++)
   {
      ls1+=(double) i;
      ls2+=(double) i*i;
   }
*s1 = ls1;
*s2 = ls2;
}