Last change
on this file since 403 was 337, checked in by coas-nagasima, 6 years ago |
ASP3版ECNLを追加
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Property svn:eol-style
set to
native
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Property svn:mime-type
set to
text/x-csrc;charset=UTF-8
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File size:
228 bytes
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1 | #include <math.h>
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2 |
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3 | /*
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4 | special cases:
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5 | logb(+-0) = -inf, and raise divbyzero
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6 | logb(+-inf) = +inf
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7 | logb(nan) = nan
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8 | */
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9 |
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10 | double logb(double x)
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11 | {
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12 | if (!isfinite(x))
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13 | return x * x;
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14 | if (x == 0)
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15 | return -1/(x*x);
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16 | return ilogb(x);
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17 | }
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