cimagf, cimag, cimagl

 

C

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Atomic operations (C11)

 

Numerics

Common mathematical functions

Floating-point environment

Complex number arithmetics

Random number generation

Type-generic math

 

Complex number arithmetic

Types and the imaginary constant
complex _Complex_I CMPLX	imaginary _Imaginary_I I
Manipulation
cimag creal carg	cabs conj cproj
Power and exponential functions
cexp clog	cpow csqrt
Trigonometric functions
ccos csin ctan	cacos casin catan
Hyperbolic functions
ccosh csinh ctanh	cacosh casinh catanh

 

Defined in header <complex.h>
float       cimagf( float complex z );	(1)	(since C99)
double      cimag( double complex z );	(2)	(since C99)
long double cimagl( long double complex z );	(3)	(since C99)
Defined in header <tgmath.h>
#define cimag( z )	(4)	(since C99)

1-3) Returns the imaginary part of z.

4) Type-generic macro: if z has type long double complex, long double imaginary, or long double, cimagl is called. If z has type float complex, float imaginary, or float, cimagf is called. If z has type double complex, double imaginary, double, or any integer type, cimag is called.

Parameters

z

-

complex argument

Return value

The imaginary 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

Run this code

#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

See also

crealcrealfcreall (C99)(C99)(C99)	computes the real part of a complex number (function)
C++ documentation for imag