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C language => Beginner questions => Topic started by: jj2007 on September 09, 2016, 02:59:41 PM

Title: Printing long double
Post by: jj2007 on September 09, 2016, 02:59:41 PM

Code: [Select]

  long double ld=1234567890.1234567890;
  printf("This is a long double:\t%.9f\n", ld); // This is a long double:  1234567890.123456746
Works like a charm, as expected. Compiles fine in GCC-64, too, but there the output is 0.000000 8)
Any explanation?

Title: Re: Printing long double
Post by: TimoVJL on September 09, 2016, 05:48:34 PM

gcc use msvcrt.dll ?
with gcc internal function

Code: [Select]

__mingw_printf("This is a long double:\t%.9Lf\n", ld);

Title: Re: Printing long double
Post by: jj2007 on September 09, 2016, 05:56:44 PM

Code: [Select]

This is a long double with msvcrt printf:       0.000000000
This is a long double with mingw printf:        1234567890.123456717
Nice find, Timo!

Title: Re: Printing long double
Post by: TimoVJL on September 09, 2016, 06:13:06 PM

-D__USE_MINGW_ANSI_STDIO useful too