# -*- coding: utf-8 -*-
# @Time : 2018/3/24 22:06 
# @Author : Lv Zhangrun 
# @Site :  
# @File : CreateExercises2.py 
# @Software: PyCharm
import random

listOperators = ["+", "-", "×", "÷"]
dictOperators = {"+": 0, "-": 0, "×": 1, "÷": 1}
countOperatorNumber = 4
maxNumber = 10


def createExercises(countOperatorNumber, listExercise):
    if countOperatorNumber == 1:  # 子数操作数为1时，单独生成[1]为一组
        temp = []
        if random.randint(0, 1) == 0:  # 随机数若为0，则产出分数
            temp.append(getFraction())
        else:  # 随机数为1，产生整数
            temp.append(random.randint(1, maxNumber))
        listExercise.append(temp)
        return listExercise
    elif countOperatorNumber == 2:  # 子数操作数为2时，生成['(',2,'+',3,')']为一组
        temp = []
        temp.append("(")
        if random.randint(0, 1) == 0:  # 随机数若为0，则产出分数
            temp.append(getFraction())
        else:  # 随机数为1，产生整数
            temp.append(random.randint(1, maxNumber))
        temp.append(listOperators[random.randint(0, 3)])
        if random.randint(0, 1) == 0:  # 随机数若为0，则产出分数
            temp.append(getFraction())
        else:  # 随机数为1，产生整数
            temp.append(random.randint(1, maxNumber))
        temp.append(")")
        listExercise.append(temp)
        return listExercise
    else:
        # 左子数操作
        left_countOperatorNumber = random.randint(1, countOperatorNumber - 1)  # 为左子数分配操作数个数
        createExercises(left_countOperatorNumber, listExercise)
        # 左子数和右子数之间补充一个操作符
        listExercise.append(listOperators[random.randint(0, 3)])
        # 右子数操作
        right_countOperatorNumber = countOperatorNumber - left_countOperatorNumber
        createExercises(right_countOperatorNumber, listExercise)
        return listExercise


def getFraction():
    numerator = random.randint(1, maxNumber)
    while True:
        denominator = random.randint(1, maxNumber)
        if denominator != 0:
            break
    if numerator == 0:
        return "0"
    n = min(numerator, denominator)
    maxn = 0
    for i in range(1, n + 1):
        if numerator % i == 0 and denominator % i == 0:
            maxn = i
    a = int(numerator / maxn)
    b = int(denominator / maxn)
    if a == b:
        return "1"
    elif b == 1:
        return str(a)
    elif a > b:
        return str(int(a / b)) + "’" + str(int(a % b)) + "/" + str(b)
    else:
        return str(a) + "/" + str(b)


if __name__ == '__main__':
    for i in range(20):
        listExercise = []
        temp = createExercises(countOperatorNumber, listExercise)
        strExercise = ""
        for tempElement1 in temp:
            if type(tempElement1) == list:
                for tempElement2 in tempElement1:
                    strExercise = strExercise + str(tempElement2)
            else:
                strExercise = strExercise + str(tempElement1)
        print(strExercise)