51 lines
937 B
C
51 lines
937 B
C
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/* int _DivUnsArrByPwrOf10(a,n,p)
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*
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* ARGUMENT
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* unsigned a[];
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* int p; power of 10 to divide by
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* int n; number of digits
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*
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* DESCRIPTION
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* Divides a number of n words (a) by a power of 10, c= a/10^p,
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* a>=0, p>0, rounding the result, c is correct only if a/10^p<2^79.
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*
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* SIDE EFFECTS
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* The value of a is destroyed.
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*
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* RETURNS
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* None. (always succeeds)
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*
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* AUTHOR
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* Brugnoli Giugno 1992
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*
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* MODIFICATIONS
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*
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*/
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#include <stdio.h>
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#include <math.h>
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#include "gm.h"
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#include "gmsystem.h"
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extern double pow(double, double);
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void _DivUnsArrByPwrOf10(a,n,p)
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unsigned SHORT a[];
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int n,p;
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{
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int ppdf,i;
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while (p>4)
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{
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_DivUnsArrByUns(a,10000,n);
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p-=4;
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}
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#ifdef SH_LIB
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ppdf=1;
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for (i=1;i<=p;i++) ppdf*=10;
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#else
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ppdf=(int)pow(10.,(double)p);
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#endif
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_DivUnsArrByUnsRound(a,ppdf,n);
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}
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