import profile
import random
from fractions import Fraction
#四则运算
def szys():
sym = ['＋', '－', '×', '÷']
f= random.randint(0, 3)
z = random.randint(0, 1)#设置一个随机值，如果是1就进行整数运算，如果是0进行分数运算
n1 = random.randint(1, 20)
n2 = random.randint(1, 20)
n3 = random.randint(1, 20)
n4 = random.randint(1, 20)
result = 0
if z==0 :
n1, n2 = max(n1, n2), min(n1, n2)
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
if z == 1:
n1, n2 = min(n1, n2), max(n1, n2)#把n1，n2中小的放在前面，保证f1为真分数
n3, n4 = min(n3, n4), max(n3, n4)#把n3，n4中小的放在前面，保证f2为真分数
f1 = Fraction(n1, n2)#初始化f1为n1/n2
f2 = Fraction(n3, n4)#初始化f2为n3/n4
if f == 0:#加法
result = f1 + f2
elif f == 1:#减法，要先比较大小，防止输出负数
f1, f2 = max(f1, f2), min(f1, f2)
result = f1 - f2
elif f== 2:#乘法
result = f1 * f2
elif f == 3:#除法，要比较大小，并循环取整除
if n1<n2:
result=0
else:
result=int(n1/n2)
print(f1, sym[f], f2, '= ', end='')
return result
print('输入go进行四则运算')
print('输入test进行性能测试')
n=input()
#当输入go时，进行四则运算，调用函数syzs()
if n=="go":
while True:
result = szys()
j= input()
try:
if int(j)== result :
print('right')
else:
print('error.，the answer is', result )
except:
print("出现异常，结束运算")
break
if n=="test":
profile.run('szys()')
