mpfr_test.c

#include <stdio.h>                                                                                         
                                                                                                           
#include <gmp.h>                                                                                           
#include <mpfr.h>                                                                                          
                                                                                                           
int main (void)                                                                                            
{                                                                                                          
  unsigned int i;                                                                                          
  mpfr_t u;                                                                                                
                                                                                                           
  mpfr_init2(u, 7000000);                                                                                  
  mpfr_const_pi(u, MPFR_RNDN);                                                                             
  mpfr_div_d (u, u, 6.0, MPFR_RNDN);                                                                       
  mpfr_sin (u, u, MPFR_RNDN);                                                                              
  mpfr_sub_d (u, u, 0.5, MPFR_RNDN);                                                                       
  printf ("Diff is ");                                                                                     
  mpfr_out_str (stdout, 10, 50, u, MPFR_RNDN);                                                             
  putchar ('\n');                                                                                          
  mpfr_clear (u);                                                                                          
  return 0;                                                                                                
}