_chgsign, _chgsignl
Reverses the sign of a double-precision, floating-point or a long double-precision, floating-point argument.
double _chgsign(
double x
);
long double _chgsignl(
long double x
);
Parameters
- x
Double-precision or long double-precision, floating-point value to be changed.
Return Value
_chgsign returns a value equal to its double-precision, floating-point argument x, but with its sign reversed. _chgsignl returns a value equal to its long double-precision, floating-point argument x, but with its sign reversed. There is no error return.
Requirements
Routine |
Required header |
|---|---|
_chgsign |
<float.h> |
_chgsignl |
<math.h> |
For more compatibility information, see Compatibility in the Introduction.
.NET Framework Equivalent
Not applicable. To call the standard C function, use PInvoke. For more information, see Platform Invoke Examples.