32 lines
462 B
C
32 lines
462 B
C
#include "clapack.h"
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double pow_ri(real *ap, integer *bp)
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{
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double pow, x;
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integer n;
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unsigned long u;
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pow = 1;
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x = *ap;
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n = *bp;
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if(n != 0)
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{
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if(n < 0)
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{
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n = -n;
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x = 1/x;
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}
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for(u = n; ; )
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{
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if(u & 01)
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pow *= x;
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if(u >>= 1)
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x *= x;
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else
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break;
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}
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}
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return(pow);
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}
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