Re: rounded number to an integer?

[Aaron Hill]

On 2021-01-02 7:38 pm, Freeman Gilmore wrote:
> How do I change a rounded number (decimal number) to an integer?
> Example:  (round 60.76) ==> 61.0     want  ==> 61

inexact->exact will do that.

;;;;
(inexact->exact (round 60.76))
=> 61
;;;;

> For:
> #(define  try  (/ (round 60.76) 64))
> #(write try)
> ==> 0.953125
> Want
> ==> 61/64

inexact->exact can return a rational, although it will only generate a 
dyadic rational, that is a rational with a power-of-two denominator.  
Something like 1.2 will not return 6/5, for instance.

;;;;
(inexact->exact 0.5)
=> 1/2
(inexact->exact 1.2)
=> 5404319552844595/4503599627370496
;;;;

What you need to do is use a combination of rationalize and 
inexact->exact:

;;;;
(rationalize (inexact->exact 1.2) 1/100)
=> 6/5
;;;;


-- Aaron Hill