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From: Daniel Franke <nos...@nowhere.com>
Newsgroups: comp.lang.fortran,comp.lang.c.moderated
Subject: reading fp-values written in Fortran D-format in C
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Date: Fri, 27 Feb 2009 06:53:35 -0600 (CST)
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[cross-posting to get views from both sides of the pond]

Hi all.

I have some trouble reading floating-point numbers written with the Fortran
D-descriptor:

$> cat dout.f90
  write( *, FMT="(d13.5)") 3.1415
end

$> gfortran dout.f90 -o dout && ./dout
  0.31415D+01


Reading above number via [f]scanf in C:

$> cat din.c
#include <stdio.h>
int main() {
  double x;
  fscanf(stdin, "%lf", &x);
  fprintf(stdout, "%lf\n", x);
  return 0;
}

$> gcc din.c -o din && ./dout | din
0.314150


While I can update the application that writes files in above format, I
still have to deal with existing files. Besides converting these files via
sed, is there anything in C (short of reimplementing/patching scanf) that
would allow me to read numbers in this format properly?

Thanks

        Daniel
-- 
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