cabsf, cabs, cabsl
From cppreference.com
Defined in header
<complex.h>
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float cabsf( float complex z );
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(1) | (since C99) |
double cabs( double complex z );
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(2) | (since C99) |
long double cabsl( long double complex z );
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(3) | (since C99) |
Defined in header
<tgmath.h>
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#define fabs( z )
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(4) | (since C99) |
1-3) Computes the complex absolute value (also known as norm, modulus, or magnitude) of
z
.
4) Type-generic macro: if
z
has type long double complex or long double imaginary, cabsl
is called. If z
has type float complex or float imaginary, cabsf
is called. If z
has type double complex or double imaginary, cabs
is called. For real and integer types, the corresponding version of fabs is called.
Contents |
[edit] Parameters
z | - | complex argument |
[edit] Return value
If no errors occur, returns the absolute value (norm, magnitude) of z
.
Errors and special cases are handled as if the function is implemented as hypot(creal(z), cimag(z))
[edit] Example
Run this code
Output:
1.0+1.0i cartesian is rho=1.414214 theta=0.785398 polar
[edit] References
- C11 standard (ISO/IEC 9899:2011):
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- 7.3.8.1 The cabs functions (p: 195)
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- 7.25 Type-generic math <tgmath.h> (p: 373-375)
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- G.7 Type-generic math <tgmath.h> (p: 545)
- C99 standard (ISO/IEC 9899:1999):
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- 7.3.8.1 The cabs functions (p: 177)
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- 7.22 Type-generic math <tgmath.h> (p: 335-337)
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- G.7 Type-generic math <tgmath.h> (p: 480)
[edit] See also
(C99)(C99)(C99)
|
computes the phase angle of a complex number (function) |
(C99)
|
computes absolute value of an integral value (|x|) (function) |
(C99)(C99)
|
computes absolute value of a floating-point value (|x|) (function) |
(C99)(C99)(C99)
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computes square root of the sum of the squares of two given numbers (√x2 +y2 ) (function) |
C++ documentation for abs
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