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ROUND.H
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C/C++ Source or Header
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1996-11-24
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924b
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56 lines
/* +++Date last modified: 09-Jul-1996 */
/*
** rounding macros by Dave Knapp, Thad Smith, Jon Strayer, & Bob Stout
*/
#ifndef ROUND__H
#define ROUND__H
#include <math.h>
#if defined(__cplusplus) && __cplusplus
/*
** Safe C++ inline versions
*/
/* round to integer */
inline int iround(double x)
{
return (int)floor(x + 0.5);
}
/* round number n to d decimal points */
inline double fround(double n, unsigned d)
{
return floor(n * pow(10., d) + .5) / pow(10., d);
}
#else
/*
** NOTE: These C macro versions are unsafe since arguments are referenced
** more than once.
**
** Avoid using these with expression arguments to be safe.
*/
/*
** round to integer
*/
#define iround(x) floor((x) + 0.5)
/*
** round number n to d decimal points
*/
#define fround(n,d) (floor((n)*pow(10.,(d))+.5)/pow(10.,(d)))
#endif
#endif /* ROUND__H */