4.129.82 static double copysign
static double copysign(double __x, double __y)
The copysign() function returns __x but with the sign of __y. They work even if __x or __y are NaN or zero.
static double copysign(double __x, double __y)
The copysign() function returns __x but with the sign of __y. They work even if __x or __y are NaN or zero.
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