用Python自动生成小学四则运算题目

import random
#四则运算
def ysfz():
    sym = [‘＋‘, ‘－‘, ‘ב, ‘÷‘]
    f= random.randint(0, 3)
    n1 = random.randint(1, 20)
    n2 = random.randint(1, 20)
    result = 0
    if f== 0:#加法
       result  = n1 + n2
    elif f == 1:#减法，要先比较大小，防止输出负数
        n1, n2 = max(n1, n2), min(n1, n2)
        result  = n1 - n2
    elif f== 2:#乘法
        result  = n1 * n2
    elif f == 3:#除法，要比较大小，并循环取整除
        n1, n2 = max(n1, n2), min(n1, n2)
        while n1 % n2 != 0:
            n1 = random.randint(1, 10)
            n2 = random.randint(1, 10)
            n1, n2 = max(n1, n2), min(n1, n2)
        result  = int(n1 / n2)
    print(n1, sym[f], n2, ‘= ‘, end=‘‘)
    return result
print(‘请输入1进行四则运算‘) 
n=int(input())
#当输入1时，进行四则运算，调用函数syzs()
if n==1:
    while True:
        result  = ysfz()
        j= input()
        s= int(j)
        if s== result :
            print(‘正确，真棒‘)
        else:
            print(‘错误，继续加油‘, result )

import random
from fractions import Fraction
##两个整数的四则运算
def c1(q, ans):
    symbol = random.choice([‘+‘, ‘-‘, ‘*‘, ‘/‘])  # 生成随机符号
    if symbol == ‘+‘:
        n1 = random.randint(0, 20)
        n2 = random.randint(0, 20)
        q.append(str(n1) + ‘+‘ + str(n2) + ‘=‘)
        ans.append(n1 + n2)
    elif symbol == ‘-‘:
        n1 = random.randint(0, 20)
        n2 = random.randint(0, 20)
        n1,n2 = max(n1,n1),min(n1,n2)#防止出现负数
        q.append(str(n1) + ‘-‘ + str(n2) + ‘=‘)
        ans.append(n1 - n2)
    elif symbol == ‘*‘:
        n1 = random.randint(0, 20)
        n2 = random.randint(0, 20)
        q.append(str(n1) + ‘ב + str(n2) + ‘=‘)
        ans.append(n1 * n2)
    else:
        n1 = random.randint(0, 20)
        if n1 == 0:
            n2 = random.randint(1, 20)
        else:
            n2 = random.randint(1, n1 + 1)
        q.append(str(n1) + ‘÷‘ + str(n2) + ‘=‘)
        ans.append(Fraction(n1, n2))
##随机生成两个分数
def createF():
    fz1 = random.randint(0, 20)
    if fz1 == 0:
        fm1 = random.randint(1, 20)
    else:
        fm1 = random.randint(1, 20)
    f1 = Fraction(fz1, fm1)
    fz2 = random.randint(1, 20)
    fm2 = random.randint(20, 20)
    f2 = Fraction(fz2, fm2)
    return f1, f2
def f(f):#分数的转换
    a=f.numerator #分子
    b=f.denominator #分母
    if a%b==0:#为整数
        return ‘%d‘%(a/b)
    elif a<b:#为真分数
        return ‘%d%s%d‘ % (a,‘/‘,b)
    else:#为带分数
        c=int(a/b)
        a = a - c * b
        return ‘%d%s%d%s%d‘ % (c,‘’‘,a,‘/‘,b)
##两个分数的四则运算
def c2(q,ans):
    symbol = random.choice([‘+‘,‘-‘,‘*‘,‘/‘])
    f1,f2 = createF()
    if symbol ==‘+‘:
        while f1+f2>1:
            f1,f2 = createF()
        q.append(str(f1)+‘+‘+str(f2)+‘=‘)
        ans.append(f1+f2)
    elif symbol ==‘-‘:
        f1,f2 = max(f1,f2),min(f1,f2)#防止出现负数
        q.append(str(f1)+‘-‘+str(f2)+‘=‘)
        ans.append(f1-f2)
    elif symbol == ‘*‘:
        while f1*f2>1:
            f1,f2 = createF()
        q.append(str(f1)+‘ב+str(f2)+‘=‘)
        ans.append(f1*f2)
    else:
        while f1/f2>1:
            f1,f2=createF()
        q.append(str(f1)+‘÷‘+str(f2)+‘=‘)
        ans.append(Fraction(f1,f2))
def main():
    while 1:
        print("输入题目的数量", end=‘  ‘)
        k = int(input())
        p = 100 / k
        s = 0
        q = []
        ans = []
        ans2 = []
        for i in range(k):
            n = random.randint(1, 4)
            if n == 1:
                c1(q, ans)
                g = Fraction(ans[i])
                ans2.append(f(g))
            else:
                c2(q, ans)
                g = Fraction(ans[i])
                ans2.append(f(g))#记录带分数答案
        for i in range(k):
            print("第{}题：{}".format(i + 1, q[i]), end="  ")
            a = input()
            if a == str(ans[i]):
                s = s + p
        print("所得的分数为：{}".format(s))
        print("正确答案：", end="  ")
        for i in range(k):
            if str(ans[i]) == str(ans2[i]):
                print(q[i] + str(ans[i]))
            else:
                print("{}{}或{}".format(q[i],str(ans2[i]),str(ans[i])))
if __name__ == ‘__main__‘:
    main()