gsl-1.9/doc/examples/ieee.c


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#include <stdio.h>
#include <gsl/gsl_ieee_utils.h>

int
main (void) 
{
  float f = 1.0/3.0;
  double d = 1.0/3.0;

  double fd = f; /* promote from float to double */
  
  printf (" f="); gsl_ieee_printf_float(&f); 
  printf ("\n");

  printf ("fd="); gsl_ieee_printf_double(&fd); 
  printf ("\n");

  printf (" d="); gsl_ieee_printf_double(&d); 
  printf ("\n");

  return 0;
}