📄 ieeeround.c
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#include <stdio.h>#include <gsl/gsl_math.h>#include <gsl/gsl_ieee_utils.h>intmain (void){ double x = 1, oldsum = 0, sum = 0; int i = 0; gsl_ieee_env_setup (); /* read GSL_IEEE_MODE */ do { i++; oldsum = sum; sum += x; x = x / i; printf ("i=%2d sum=%.18f error=%g\n", i, sum, sum - M_E); if (i > 30) break; } while (sum != oldsum); return 0;}
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