complexNumber.py

class ComplexNumber:
    def __init__(self, real, imag):
        self.real = real
        self.imag = imag

    def __add__(self, other):
        return ComplexNumber(self.real + other.real, self.imag + other.imag)

    def __sub__(self, other):
        return ComplexNumber(self.real - other.real, self.imag - other.imag)

    def __mul__(self, other):
        return ComplexNumber(self.real * other.real - self.imag * other.imag, 
                             self.real * other.imag + self.imag * other.real)

    def __str__(self):
        if self.imag >= 0:
            return f"{self.real} + {self.imag}i"
        else:
            return f"{self.real} - {abs(self.imag)}i"

class Vector:
    def __init__(self, x, y):
        self.x = x
        self.y = y

    def __add__(self, other):
        return Vector(self.x + other.x, self.y + other.y)

    def __sub__(self, other):
        return Vector(self.x - other.x, self.y - other.y)

    def __mul__(self, scalar):
        return Vector(self.x * scalar, self.y * scalar)

    def __str__(self):
        return f"({self.x}, {self.y})"