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Reverses the sign of a double-precision, floating-point argument.

double _chgsign( 
   double x 


Double-precision, floating-point value to be changed.

Return Value

_chgsign returns a value equal to its double-precision, floating-point argument x, but with its sign reversed. There is no error return.


Routine Required header Compatibility
_chgsign <float.h> Win 98, Win Me, Win NT, Win 2000, Win XP

For additional compatibility information, see Compatibility in the Introduction.


All versions of the C run-time libraries.

See Also

Floating-Point Support Routines | fabs | _copysign | Run-Time Routines and .NET Framework Equivalents

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