_chgsign, _chgsignf, _chgsignl

Reverses the sign of a floating-point argument.

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

Parameters

• x
  The floating-point value to be changed.

Return Value

The _chgsign functions return a value that's equal to the floating-point argument x, but with its sign reversed. There is no error return.

Requirements

Routine	Required header
_chgsign	<float.h>
_chgsignf, _chgsignl	<math.h>

For more compatibility information, see Compatibility.

.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, copysignf, copysignl, _copysign, _copysignf, _copysignl