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cimagf, cimag, cimagl

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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.

Contents

[edit] Parameters

z - complex argument

[edit] 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

[edit] Notes

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

[edit] 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

[edit] References

C11 standard (ISO/IEC 9899:2011):

7.3.9.2 The cimag functions (p: 197)

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):

7.3.9.2 The cimag functions (p: 178-179)

7.22 Type-generic math <tgmath.h> (p: 335-337)

G.7 Type-generic math <tgmath.h> (p: 480)

[edit] See also

crealcrealfcreall

(C99)(C99)(C99)

computes the real part of a complex number
(function) [edit]

C++ documentation for imag

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