Complex number

C

src/c/data-structure/03-complex-number.c

// also see complex.h
#include <stdio.h>

int main()
{
    _Complex float z = 4.0 + 3.0i;

    printf("Real part = %f\n", __real__(z));
    printf("Imaginary part = %f\n", __imag__(z));
    
    // complex conjugate
    _Complex float conj_z = ~z;
    printf("Conjugate = (%f, %f)\n", __real__(conj_z), __imag__(conj_z));

    return 0;
}

C++

src/cpp/data-structure/03-complex-number.cpp

#include <iostream>
#include <complex>
using namespace std;

int main()
{
    complex<double> z(2.0, 3.0); // declare complex number: 2 + 3i

    // real and imaginary parts
    cout << "Real part: " << real(z) << endl;
    cout << "Imaginary part: " << imag(z) << endl;

    // absolute value
    cout << "Absolute value of " << z << " is " << abs(z) << endl;

    // norm
    cout << "Norm of " << z << " is " << norm(z) << endl;

    // complex conjugate
    cout << "Complex conjugate of " << z << " is " << conj(z) << endl;

    complex<double> z2(3.0, 4.0);
    cout << z << " + " << z2 << " = " << z + z2 << endl;
    cout << z << " * " << z2 << " = " << z * z2 << endl;

    return 0;
}