Task

Write two equal-sized numerical arrays 'x' and 'y' to
a two-column text file named 'filename'.

The first column of the file contains values from an 'x'-array with a
given 'xprecision', the second -- values from 'y'-array with 'yprecision'.

For example, considering:

   x = {1, 2, 3, 1e11};
   y = {1, 1.4142135623730951, 1.7320508075688772, 316227.76601683791}; 
                                                          /* sqrt(x) */
   xprecision = 3;
   yprecision = 5;

The file should look like:

   1    1
   2    1.4142
   3    1.7321
   1e+011   3.1623e+005

This task is intended as a subtask for Measure relative performance of sorting algorithms implementations.




create x  1e f, 2e       f, 3e       f, 1e11       f,
create y  1e f, 2e fsqrt f, 3e fsqrt f, 1e11 fsqrt f,
 
: main
  s" sqrt.txt" w/o open-file throw  to outfile-id
 
  4 0 do
    4 set-precision
    x i floats + f@ f.
    6 set-precision
    y i floats + f@ f. cr
  loop
 
  outfile-id  stdout to outfile-id
  close-file throw ;