class fracHandle:

    def __init__(self):

        self

    #分数变为字符串

    def fracToStr(self,fraction):

        numer = fraction.numerator

        denom = fraction.denominator

        if denom == 0:

            return False

        INT = int(numer / denom)

        LEFT = numer % denom

        if LEFT==0 or denom >= numer:

            return str(Fraction(numer, denom))

        else:

            return str(INT) + '\'' + str(Fraction(LEFT, denom))

    #字符串变为分数

    def strToFrac(self,string):

        #如果是带分数

        if '\'' in string:

            fullFrac = string.split('\'')

            INT = int(fullFrac[0])

            NUMERATOR = int((fullFrac[1].split('/'))[0])

            DENOMINATOR =int((fullFrac[1].split('/'))[1])

            return Fraction((INT*DENOMINATOR+NUMERATOR),DENOMINATOR)

        elif '/' in string:

            NUMERATOR = int((string.split('/'))[0])

            DENOMINATOR = int((string.split('/'))[1])

            return Fraction(NUMERATOR,DENOMINATOR)

        else :

            return Fraction(int(string),1)

    #分数的计算

    def fracAccount(self,frac1,frac2,sign):

        if(sign == '+'):

            return frac1+frac2

        elif(sign == '-'):

            if frac1<frac2:

                return False

            else:

                return frac1-frac2

        elif(sign == '*'):

            return frac1*frac2

        else:

            if frac2 == 0:

                return False

            else:

                return frac1/frac2

import random

import time

from demo_random import randomMake

from fracHandle import fracHandle

from isRepeat import testRepeat

from fractions import Fraction

class exercise :

    def __init__(self,account = 100,range = 10):

        self.account = account

        self.range = range

    #生成题目

    def makeExe(self):

        localtime = time.asctime(time.localtime(time.time()))

        #清理文件内容

        with open("Exercise.txt", 'w') as exercise_file:

            exercise_file.write("题目数量 ： "+ str(self.account)+ "\t时间 ：" + localtime+ "\n")

            exercise_file.close()

        with open("Answer.txt", 'w') as Answer_file:

            Answer_file.close()

        que_order = 0

        repeat = testRepeat()

        makeQue = randomMake(repeat,self.range)

        #生成account道题

        while que_order < self.account:

            choose2_3 = 2+random.randint(0,1)

            #两个数的运算题生成

            if choose2_3 == 2:

                makeQue.question_2bits(que_order+1)

            #三个数的运算题生成

            elif choose2_3 == 3:

                makeQue.question_3bits(que_order+1)

            que_order+=1

    def random_sign(self):

        randomSign = random.randint(0, 3)

        if randomSign == 0:

            sign = '+'

        elif randomSign == 1:

            sign = '-'

        elif randomSign == 2:

            sign = '*'

        else:

            sign = '÷'

        return sign

    #随机生成分数

    def random_frac(self):

        while(True):

            numer = random.randint(0, self.range)  # 分子

            dno = random.randint(1, self.range)  # 分母

            Num = Fraction(numer, dno)

            if Num:

                break

        return Num

class testRepeat:

    def __init__(self):

        self.oldNumber = {}     #已有的数字组合

        self.signDic = {}       #已有的符号组合

    #检测是否式子重复

    def isRepeat(self,numberList,signList):

        numberList.sort()

        signList.sort()

        if self.oldNumber:

            for key,value in self.oldNumber.items():

                if value==numberList and self.signDic[key]==signList:

                    return False

            self.oldNumber[key+1] = numberList

            self.signDic[key+1] = signList

        else:

            self.oldNumber[0]  = numberList

            self.signDic[0] = signList

        return True