ba237a9d91
Files correlati : Ricompilazione Demo : [ ] Commento : Aggiunti i sorgenti per Greenleaf Math Library (gfm.dll) git-svn-id: svn://10.65.10.50/trunk@10079 c028cbd2-c16b-5b4b-a496-9718f37d4682
60 lines
1.1 KiB
C
Executable File
60 lines
1.1 KiB
C
Executable File
/* DEC *PercentChange(pDst,pSrc1,pSrc2)
|
|
*
|
|
* ARGUMENT
|
|
* DEC *pDst, *pSrc1, pSrc2;
|
|
*
|
|
* DESCRIPTION
|
|
* Calculates the percent change between pSrc1 and pSrc2 as a percentage
|
|
* of pSrc1, stroring the result in pDst.
|
|
* pDst = ((pSrc2 - pSrc1) / pSrc1) * 100
|
|
* pDst is calculated to maximum precision.
|
|
*
|
|
* SIDE EFFECTS
|
|
* None.
|
|
*
|
|
* RETURNS
|
|
* Returns a pointer to the dest structure unless overflow,
|
|
* when it returns a GM_NULL.
|
|
*
|
|
* POSSIBLE ERROR CODES
|
|
*
|
|
* GM_NULLPOINTER
|
|
* GM_NOMEMORY
|
|
* GM_OVERFLOW
|
|
* GM_UNDERFLOW
|
|
* GM_DIV0
|
|
*
|
|
* AUTHOR
|
|
* Jared Levy
|
|
* Copyright (C) 1987-1990 Greenleaf Software Inc. All rights reserved.
|
|
*
|
|
* MODIFICATIONS
|
|
*
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include "gm.h"
|
|
#include "gmsystem.h"
|
|
|
|
DEC *PercentChange(pDst,pSrc1,pSrc2)
|
|
DEC *pDst;
|
|
DEC *pSrc1,*pSrc2;
|
|
{
|
|
DEC dtemp, *temp=&dtemp, ddiff, *diff=&ddiff;
|
|
|
|
_MacStart(GM_PCHANGE);
|
|
|
|
_MacInVarD(pSrc1);
|
|
_MacInVarD(pSrc2);
|
|
|
|
_SubDec80Bit(diff, pSrc2, pSrc1);
|
|
|
|
_MacDCopy(temp, pSrc1);
|
|
temp->dc.id += 2;
|
|
|
|
pDst = DivideDecimal(pDst, diff, temp);
|
|
|
|
_MacRet(pDst);
|
|
/* error flag set by DivideDecimal */
|
|
}
|