_chgsign, _chgsignf, _chgsignl

 

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Reverses the sign of a floating-point argument.

Syntax

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

Floating-Point Support
fabs, fabsf, fabsl
copysign, copysignf, copysignl, _copysign, _copysignf, _copysignl