使用python的类实现分数的运算，只弄了加法，其他的通分后自己运算一下加个函数就可以了
from fractions import gcd
class Fraction:
def __init__(self,top,bottom):
self.num = top
self.den = bottom
def __str__(self):
return str(self.num) + "/" + str(self.den)
def show(self):
print(self.num,"/",self.den)
def __add__(self, otherfraction):
newnum = self.num * otherfraction.den + self.den * otherfraction.num
newden = self.den * otherfraction.den
common = gcd(newnum, newden)
return Fraction(newnum // common, newden // common)
def __eq__(self, other):
firstnum = self.num * other.den
secondnum = other.num * self.den
return firstnum == secondnum
