using System;
using System.Console;
using System.Numerics;
using System.Numerics.Complex;

module RCComplex
{
    PrettyPrint(this c : Complex) : string
    {
        mutable sign = '+';
        when (c.Imaginary < 0) sign = '-';
        $"$(c.Real) $sign $(Math.Abs(c.Imaginary))i"
    }

    Main() : void
    {
        def complex1 = Complex(1.0, 1.0);
        def complex2 = Complex(3.14159, 1.2);

        WriteLine(Add(complex1, complex2).PrettyPrint());
        WriteLine(Multiply(complex1, complex2).PrettyPrint());
        WriteLine(Negate(complex2).PrettyPrint());
        WriteLine(Reciprocal(complex2).PrettyPrint());
        WriteLine(Conjugate(complex2).PrettyPrint());
    }
}