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crealf, creal, creall

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.

Parameters

- -
z - complex argument

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

-

Notes

For any complex variable z, z == creal(z) + I*cimag(z).

-

Example

#include <stdio.h>
-#include <complex.h>
- 
-int main(void)
-{    
-    double complex z = 1.0 + 2.0*I;
-    printf("%f%+fi\n", creal(z), cimag(z));
-}

Output:

-
1.000000+2.000000i

References

See also

- -
-
(C99)(C99)(C99)
 computes the imaginary part a complex number
(function)
C++ documentation for real
-

- © cppreference.com
Licensed under the Creative Commons Attribution-ShareAlike Unported License v3.0.
- https://en.cppreference.com/w/c/numeric/complex/creal -

-
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