Rounding in C
Douglas M. MacFarlane
RHMCSUPV at MIAMIU.BITNET
Wed Sep 5 14:37:25 AEST 1990
Thanks to all who posted responses and e-mailed me directly on my
assinging values to type float question. They were most appreciated.
Microsoft C ver 5.1 required an explicit cast (ugh or yuk from some
of you) i.e.:
fValue = (float) 35 ;
to remove the data conversion warning.
Next question: Rounding
fPrice = 1.35 ;
fSpending = 10000 * fPrice ;
printf ( "Spending is: %f", fSpending ) ;
produces the output 13499.9997 instead of 13500
I seem to recall that these problems are inherent to computing, but
a rounding function would do the trick. Has anyone written a
RoundAFloat function that accepts a floating point value and the
number of decimal places to round to ( 2 for round to 2 decimal places,
-2 to round to the hundreds, etc.)?
If so, could you send it to me, or post.
Thanks
Doug MacFarlane
RHMCSUPV at miamiu.acs.muohio.edu
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