Each of these macros expands to an expression that evaluates to the value of the specified complex type, with the real part having the value of real (converted to the specified argument type) and the imaginary part having the value of imag (converted to the specified argument type)
The expressions are suitable for use as initializers for objects with static or thread storage duration, as long as the expressions real and imag are also suitable.
A complex number composed of real and imag as the real and imaginary parts.
These macros are implemented as if the imaginary types are supported (even if they are otherwise not supported and _Imaginary_I is actually undefined) and as if defined as follows:
#define CMPLX(x, y) ((double complex)((double)(x) + _Imaginary_I * (double)(y)))
#define CMPLXF(x, y) ((float complex)((float)(x) + _Imaginary_I * (float)(y)))
#define CMPLXL(x, y) ((long double complex)((long double)(x) + \
_Imaginary_I * (long double)(y)))[edit] Example
#include <stdio.h>
#include <complex.h>
int main(void)
{
double complex z = CMPLX(0.0, -0.0);
printf("z = %.1f%+.1fi\n", creal(z), cimag(z));
}
Output:
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