_cabs (Windows CE 5.0)
Developing an Application > Microsoft C Run-time Library for Windows CE > Run-time Library Reference
Calculates the absolute value of a complex number.
double _cabs( struct _complexz);
Parameters
- z
Complex number.
Return Values
If successful, _cabs returns the absolute value of its argument.
On overflow, _cabs returns HUGE_VAL.
Remarks
The _cabs function calculates the absolute value of a complex number, which must be a structure of type _complex.
The structure z is composed of a real element x and an imaginary element y.
A call to _cabs produces a value equivalent to that of the expression sqrt( z.x*z.x + z.y*z.y ).
Example
/* CABS.C: Using _cabs, this program calculates
* the absolute value of a complex number.
*/
void main( void )
{
struct _complex number = { 3.0, 4.0 };
double d;
d = _cabs( number );
printf( "The absolute value of %f + %fi is %f\n",
number.x, number.y, d );
}
Output
The absolute value of 3.000000 + 4.000000i is 5.000000
Requirements
OS Versions: Windows CE 2.0 and later.
Header: stdlib.h.
Link Library: coredll.dll.
See Also
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