alibRound
Rounds each element of an array to the nearest integer. Half-way cases are rounded away from zero. The PV-WAVE API for this routine is the
NINT Function (specifically the
Floating keyword).
Prototypes
void alibRoundf( wvlong n, float *p, float *r )
void alibRoundd( wvlong n, double *p, double *r )
Parameters
n — (Input) The number of elements in the array.
*p — (Input) The n-element source array.
*r — (Input/Output) The destination array. On return, each element has been rounded to the nearest integer. Half-way cases are rounded away from zero. This operation can be done in-place, i.e., r can equal p.
Example
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include "alib.h"
void main() { /* make up some data for the examples */
float f0[5]={-1.75,-0.5,0.25,0.5,2}, *f; /* make output array */
f = (float*)malloc(5*sizeof(float));
printf( "\n\n show array f0" );
alibinit( NULL, NULL, NULL, NULL );
alibPrintArrayf( 1, 1, 1, 5, f0, NULL );
printf( "\n\n round each element in f0 to the nearest integer" );
alibRoundf( 5, f0, f );
alibPrintArrayf( 1, 1, 1, 5, f, NULL );
}
Output:
show array f0
-1.750e+00 -5.000e-01 2.500e-01 5.000e-01 2.000e+00
round each element in f0 to the nearest integer
-2.000e+00 -1.000e+00 0.000e+00 1.000e+00 2.000e+00
Version 2017.1
Copyright © 2019, Rogue Wave Software, Inc. All Rights Reserved.