crealf, creal, creall
From cppreference.com
| 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.Contents |
[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
| (C99)(C99)(C99) |
computes the imaginary part a complex number (function) |
| C++ documentation for real
| |