• Andrew Brown (6/6) May 19 2014 I would like to write a double to a text file as hexadecimal and
• bearophile (15/17) May 19 2014 Is this good enough for you?
• Andrew Brown (2/19) May 19 2014

"Andrew Brown" <aabrown24 hotmail.com> writes:

I would like to write a double to a text file as hexadecimal and 
then read it back in without losing information. Could someone 
tell me whether this is possible? It would happen in the same 
program, would I have to worry about different architectures?

Thanks very much

Andrew

"bearophile" <bearophileHUGS lycos.com> writes:

Andrew Brown:

 I would like to write a double to a text file as hexadecimal 
 and then read it back in without losing information.

Is this good enough for you?

void main() {
     import std.stdio, std.math;

     auto fout = File("ouput.txt", "w");
     fout.writef("%a", PI);
     fout.close;

     auto fin = File("ouput.txt");
     real r;
     fin.readf("%f", &r);
     fin.close;
     assert(PI == r);
}

Bye,
bearophile

"Andrew Brown" <aabrown24 hotmail.com> writes:

I'm sure it will be, thank you very much.

On Monday, 19 May 2014 at 15:57:53 UTC, bearophile wrote:
 Andrew Brown:

 I would like to write a double to a text file as hexadecimal 
 and then read it back in without losing information.

 Is this good enough for you?

 void main() {
     import std.stdio, std.math;

     auto fout = File("ouput.txt", "w");
     fout.writef("%a", PI);
     fout.close;

     auto fin = File("ouput.txt");
     real r;
     fin.readf("%f", &r);
     fin.close;
     assert(PI == r);
 }

 Bye,
 bearophile