File: ieeeround.c

package info (click to toggle)
gsl-doc 2.3-1
  • links: PTS
  • area: non-free
  • in suites: buster
  • size: 27,748 kB
  • ctags: 15,177
  • sloc: ansic: 235,014; sh: 11,585; makefile: 925
file content (30 lines) | stat: -rw-r--r-- 450 bytes parent folder | download | duplicates (14) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
 
#include <stdio.h>
#include <gsl/gsl_math.h>
#include <gsl/gsl_ieee_utils.h>

int
main (void)
{
  double x = 1, oldsum = 0, sum = 0; 
  int i = 0;

  gsl_ieee_env_setup (); /* read GSL_IEEE_MODE */

  do 
    {
      i++;
      
      oldsum = sum;
      sum += x;
      x = x / i;
      
      printf ("i=%2d sum=%.18f error=%g\n",
              i, sum, sum - M_E);

      if (i > 30)
         break;
    }  
  while (sum != oldsum);

  return 0;
}