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_chgsign, _chgsignf, _chgsignl

  • Artikel

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