crealf, creal, creall
From cppreference.com
Defined in header
<complex.h>
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float crealf( float complex z );
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(1) | (since C99) |
double creal( double complex z );
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(2) | (since C99) |
long double creall( long double complex z );
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(3) | (since C99) |
Defined in header
<tgmath.h>
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#define creal( z )
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(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):
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- 7.3.9.6 The creal functions (p: 198-199)
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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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- 7.3.9.5 The creal functions (p: 180)
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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)
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computes the imaginary part a complex number (function) |
C++ documentation for real
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