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thinkphp/ln.c

Created March 17, 2017 07:14
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ln.c
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ln.c
double computesLN2(double n, double lo, double hi) {
double a = lo, b = hi, m;
while( fabs(a - b) > EPS ) {
m = (a + b) / 2.0;
if( (f( m, n) ) < 0) a = m;
else
b = m;
}
return (a+b)/2.0;
}
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