crealf, creal, creall
From cppreference.com
C
Concurrency support (C11)
Complex number arithmetic
Types and the imaginary constant
Manipulation
Power and exponential functions
Trigonometric functions
Hyperbolic functions
Defined in header
<complex.h>
float crealf( float complex z );
(1)
(since C99)
double creal( double complex z );
(2)
(since C99)
long double creall( long double complex z );
(3)
(since C99)
Defined in header
<tgmath.h>
#define creal( z )
(4)
(since C99)
1-3) Returns the real part of
z.4) Type-generic macro: if
z has type long double complex , long double imaginary , or long double, creall is called. If z has type float complex , float imaginary , or float, crealf is called. If z has type double complex , double imaginary , double, or any integer type, creal is called.[edit] Parameters
z
-
complex argument
[edit] Return value
The real part of z.
This function is fully specified for all possible inputs and is not subject to any errors described in math_errhandling
[edit] Notes
For any complex variable z, z == creal(z) + I*cimag (z).
[edit] Example
Run this code
Output:
1.000000+2.000000i
[edit] References
- C11 standard (ISO/IEC 9899:2011):
- 7.3.9.6 The creal functions (p: 198-199)
- 7.25 Type-generic math <tgmath.h> (p: 373-375)
- G.7 Type-generic math <tgmath.h> (p: 545)
- C99 standard (ISO/IEC 9899:1999):
- 7.3.9.5 The creal functions (p: 180)
- 7.22 Type-generic math <tgmath.h> (p: 335-337)
- G.7 Type-generic math <tgmath.h> (p: 480)
[edit] See also
C++ documentation for real