Defect in XSH fabs

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        Defect report from : Loic Domaigne , personal interest

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@ page 0 line 0 section fabs comment {fabs}

Problem:

Edition of Specification (Year): 2003

Defect code :  2. Omission

Missing example

Action:

Computing the 1-norm of a floating point vector

This example shows the use of fabs() to compute the 1-norm of a 
vector defined as follows:
          
norm1(v) = |v[0]| + |v[1]| + ... + |v[n-1]|

where |x| denotes the absolute value of x,
       n  denotes the vector's dimension
     v[i] denotes the i-th component of v (0<=i<n)


#include <math.h>

double
norm1(const double v[], /* vector components */
      const int    n    /* vector dimension  */
      )
{
  int     i; 
  double  n1_v;  /* 1-norm of v */

  n1_v = 0;
  for (i=0; i<n; i++) 
  {
    n1_v += fabs (v[i]);
  }

  return n1_v;
}


Note: you might derived similar functions using 
fabsf() and fabsl().