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OS/2 Shareware BBS: 10 Tools
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octa21fs.zip
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octave
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f2c
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libf77
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pow_ri.c
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C/C++ Source or Header
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2000-01-15
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382b
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35 lines
#include "f2c.h"
#ifdef KR_headers
double pow_ri(ap, bp) real *ap; integer *bp;
#else
double pow_ri(real *ap, integer *bp)
#endif
{
double pow, x;
integer n;
pow = 1;
x = *ap;
n = *bp;
if(n != 0)
{
if(n < 0)
{
n = -n;
x = 1/x;
}
for( ; ; )
{
if(n & 01)
pow *= x;
if(n >>= 1)
x *= x;
else
break;
}
}
return(pow);
}