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Ingy döt Net 2023-07-01 11:58:00 -04:00
parent 7387c8f97b
commit cb5bb5e222
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54
Task/Golden-ratio-Convergence/C/golden-ratio-convergence.c Normal file
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#include <stdio.h>
#include <math.h>
static void
using_float () /* C2x does not require "void". */
{
int count = 0;
float phi0 = 1.0f;
float phi1;
float difference;
do
{
phi1 = 1.0f + (1.0f / phi0);
difference = fabsf (phi1 - phi0);
phi0 = phi1;
count += 1;
}
while (1.0e-5f < difference);
printf ("Using type float --\n");
printf ("Result: %f after %d iterations\n", phi1, count);
printf ("The error is approximately %f\n",
phi1 - (0.5f * (1.0f + sqrtf (5.0f))));
}
static void
using_double () /* C2x does not require "void". */
{
int count = 0;
double phi0 = 1.0;
double phi1;
double difference;
do
{
phi1 = 1.0 + (1.0 / phi0);
difference = fabs (phi1 - phi0);
phi0 = phi1;
count += 1;
}
while (1.0e-5 < difference);
printf ("Using type double --\n");
printf ("Result: %f after %d iterations\n", phi1, count);
printf ("The error is approximately %f\n",
phi1 - (0.5 * (1.0 + sqrt (5.0))));
}
int
main () /* C2x does not require "void". */
{
using_float ();
printf ("\n");
using_double ();
}