conjf, conj, conjl

Parameters

Return value

The complex conjugate of z .

Notes

On C99 implementations that do not implement I as _Imaginary_I , conj may be used to obtain complex numbers with negative zero imaginary part. In C11, the macro CMPLX is used for that purpose.

Example

#include <stdio.h>
#include <complex.h>
 
int main(void)
{
    double complex z = 1.0 + 2.0*I;
    double complex z2 = conj(z);
    printf("The conjugate of %.1f%+.1fi is %.1f%+.1fi\n",
            creal(z), cimag(z), creal(z2), cimag(z2));
 
    printf("Their product is %.1f%+.1fi\n", creal(z*z2), cimag(z*z2));
}

The conjugate of 1.0+2.0i is 1.0-2.0i
Their product is 5.0+0.0i

References