Function has_minus_sign (o2scl)

O2scl : Function List

bool o2scl::has_minus_sign(double *x)

Find out if the number pointed to by x has a minus sign.

This function returns true if the number pointed to by x has a minus sign, determining this by converting the number to a string. It is useful, for example, in distinguishing “-0.0” from “+0.0”.