ПЗ - 2. Задание 1.

""" Задание 1: расширить класс Fraction методами сложения двух дробей, вычитания двух дробей, деления двух дробей и сокращения """
class Fraction:
    def __init__(self, num, denum):
        self.num = num
        self.denum = denum

    def gcd(self, a, b):
        m = b
        if a < b:
            m = a
        for i in range(m, 1, -1):
            if a % i == 0 and b % i == 0:
                return i
        return 1

    def reduction(self, t):
        temp = Fraction(1,1)
        k = self.gcd(t.num, t.denum)
        temp.num = t.num // k
        temp.denum = t.denum // k
        return temp

    def multiplication(self, t):
        temp = Fraction(1,1)
        temp.num = self.num * t.num
        temp.denum = self.denum * t.denum
        return self.reduction(temp)

    def division(self, t):
        if t.denum != 0:
            temp = Fraction(1,1)
            temp.num = self.num * t.denum
            temp.denum = self.denum * t.num
        else:
            temp = Fraction(0,0)
        return self.reduction(temp)

    def addition(self, t):
        temp = Fraction(1,1)
        temp.num = self.num * t.denum + t.num * self.denum
        temp.denum = self.denum * t.denum
        return self.reduction(temp)

    def subtraction(self, t):
        temp = Fraction(1,1)
        temp.num = self.num * t.denum - t.num * self.denum
        temp.denum = self.denum * t.denum
        return self.reduction(temp)

    def print_fractoin(self):
        if self.denum != 0:
            print ("{}/{}".format(self.num, self.denum))
        else:
            print("ERR")
#-------------------------------------------------------------------------------
f1 = Fraction(10,10)
f2 = Fraction(10,10)

f_add = f1.addition(f2)
f_add.print_fractoin()

f_sub = f1.subtraction(f2)
f_sub.print_fractoin()

f_mult = f1.multiplication(f2)
f_mult.print_fractoin()

f_div = f1.division(f2)
f_div.print_fractoin()