I am trying to report GPA calculation results to 2 decimal places, so I thought real->decimal-string would do the trick. However, the following behavior surprised me:
> (real->decimal-string 3.225 2) "3.23" > (real->decimal-string 4.225 2) "4.22" I would like the second answer to be "4.23", which is what a student would expect to see if they did the calculations themselves. The documentation for real->decimal-string says that it first converts the argument to an exact number. I suspect the problem has something to do with this: > (inexact->exact 4.225) 4 126663739519795/562949953421312 > (/ 126663739519795.0 562949953421312.0) 0.22499999999999964 Is there another rounding function that would just round the floating point without going through the conversion to exact? -Greg ____________________ Racket Users list: http://lists.racket-lang.org/users
