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_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's no error return.

Requirements

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

For more compatibility information, see Compatibility.

See also

Math and floating-point support
fabs, fabsf, fabsl
copysign, copysignf, copysignl, _copysign, _copysignf, _copysignl