_chgsign, _chgsignl

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

double _chgsign( 
   double x 
);
long double _chgsignl( 
   long double x 
);

Parameters

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

Requirements

For more compatibility information, see Compatibility in the Introduction.

.NET Framework Equivalent

Not applicable. To call the standard C function, use PInvoke. For more information, see Platform Invoke Examples.

See Also

Reference

Floating-Point Support

fabs, fabsf

_copysign, _copysignl