def operate(self, num1, num2, operater):
if not isinstance(num1, Fraction):
num1 = Fraction(num1)
if not isinstance(num2, Fraction):
num2 = Fraction(num2)
# 计算结果
if operater == '+':
return self.fraction_add(num1, num2)
if operater == '-':
return self.fraction_minus(num1, num2)
if operater == '×':
return self.fraction_multiply(num1, num2)
if operater == '÷':
return self.fraction_divide(num1, num2)
def fraction_multiply(fra1, fra2):
molecular = fra1.molecular * fra2.molecular
denominator = fra1.denominator * fra2.denominator
return Fraction(molecular, denominator)
def fraction_divide(fra1, fra2):
molecular = fra1.molecular * fra2.denominator
denominator = fra1.denominator * fra2.molecular
return Fraction(molecular, denominator)
def fraction_minus(fra1, fra2):
molecular = fra1.molecular * fra2.denominator - fra2.molecular * fra1.denominator
denominator = fra1.denominator * fra2.denominator
return Fraction(molecular, denominator)