#include<stdio.h>
#include<stdlib.h>
#include<math.h>

struct nb_complex {
	float real;
	float imaginary;
};

typedef struct nb_complex complex;

float module(complex z) {
	return sqrt(pow(z.real, 2) + pow(z.imaginary, 2));
}

complex conjugate(complex z) {
	z.imaginary = -z.imaginary;
	return z;
}

complex inverse(complex z) {
	float a = z.real;
	float b = z.imaginary;
	z.real = a/(pow(a, 2) + pow(b, 2));
	z.imaginary = -b/(pow(a, 2) + pow(b, 2));

	return z;
}

int main(int argc, char * argv[]) {
	complex a = {1.0f, 1.0f};
	printf("%f\n", module(inverse(a)));
	return EXIT_SUCCESS;
}