_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   
);

x
The floating-point value to be changed.

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.

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

For more compatibility information, see Compatibility.

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