Re: Rounding function in c

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Article #43

#43

From: Michael Neylon
Date: Wed, 29 Jul 1992 12:10

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In article <451@rascal.UUCP>, theo@rascal.UUCP (T. Kramer 794-1472) writes...
>In article <1992Jul16.232926.4740@rossinc.com> ciaranst@rossinc.com (ciaran storan) writes:
>>
>>Hi,
>> Does anyone out there have a rounding function for ANSI 'C', I am
>>trying to do some financial applications, and badly need a rounding
>>function.
>>
>>Any HELP??.
> 
>Me too please.
> 
>please email me theo@rascal.UUCP 

/* rounds num to nearest base */
int round(float num, int base)
{
	int retval;
	num += base/2;
	retval = ((int) num)/base;
	retrun retval*base;
}

so if i had 5632 and I wanted to round it to the hundreds place...
  5632 +(100)/2 = 5682;
  5682/100 = 56.82 = 56 (int math drops the fractional part)
  56 *100 = 5600;

and for 5683
  5683 + 50 = 5733
  5733/100 = 57
  57*100 = 5700

Mike Neylon          aka Masem the Great and Almighty Thermo GOD
  // Only the | Univ. of Toledo - Chemical Engineering - Senior
\X/   AMIGA!  |   NASA Lewis Research Center - Summer Intern
\_____________|_____smneyln@ariel.lerc.nasa.gov________________/
       -+ How do YOU spell 'potato'?  How about 'lousy'? +- 
      "Me and Spike are big Malcolm 10 supporters."-J.S.,PLCL

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References: <1992Jul14.181421.24591@mr.med.ge.com> <1992Jul16.232926.4740@rossinc.com> <451@rascal.UUCP>

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Path: arc1-ca.pugleaf.net!sparky!uunet!gatech!usenet.ins.cwru.edu!eagle!ariel.lerc.nasa.gov!smneyln
From: smneyln@ariel.lerc.nasa.gov (Michael Neylon)
Subject: Re: Rounding function in c
Message-ID: <29JUL199207101332@ariel.lerc.nasa.gov>
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References: <1992Jul14.181421.24591@mr.med.ge.com> <1992Jul16.232926.4740@rossinc.com> <451@rascal.UUCP>
Date: 29 Jul 1992 07:10 EST  
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