import random
# 调用一个随机数包（只看if的情况可忽略）

n1 = random.randrange(100)

n2 = random.randrange(100)

print(n1,n2)

jg = int(input())

if jg == (n1 + n2):

    print('结果为真')

else:

    print('结果为假')

a,b,c = map(float,input("Enter a,b,c : ").split())# 连续输入三个数字

i = b * b - (4 * a * c)

if i >0 :

    r1 = (-b + (b * b - (4 * a * c))** 0.5) / 2 * a

    r2 = (-b - (b * b - (4 * a * c))** 0.5) / 2 * a

    print("The roots are {} and {}",r1,r2)

elif i == 0 :# 使用elif再次判断

    print(-b / 2 * a)

else :# 使用else进行最后的输出

    print("The equation has no real roots") 

password = input('passward:')# 输入一串字符，必须包括数字，大小写字母

count1,count2,count3 = False,False,False

for i in password:# 从第一个字母开始判断

    if i <= 'Z' and i >='A':

        count1 = True

    if i <= 'z' and i >='a':

        count2 = True

    if i <= '9' and i >='0':

        count3 = True

if count1 and count2 and count3:

    print('ok')

else:

    print('必须包含大小写和数字')

i = 0

while i<10:

    print('我是大牛')

    i += 1

import random

c = random.randrange(1000,9999)

print('验证码：',c)

for i in range(3):

    b = int(input('请输入验证码：'))# 结果不要应该有四次输出，懒得改

    if b == c:

        print('输入正确')

        break

    else:

        print('输入错误，请重试')

else:

    print('请退出账号重试')

import numpy as np

A = '石头'

B = '剪刀'

C = '布'

for i in range(6):# 循环6次

    res = np.random.choice([A,B,C])

    res1 = np.random.choice([A,B,C])

    print('电脑出的：',res,'你出的',res1)

    if (res == A) and (res1 == B):

        print('你输了')

    elif (res == A) and (res1 == C):

        print('你赢了')

    elif (res == B) and (res1 == C):

        print('你输了')

    elif (res == B) and (res1 == A):

        print('你赢了')

    elif (res == C) and (res1 == A):

        print('你输了')

    elif (res == C) and (res1 == B):

        print('你赢了')

    elif (res == A) and (res1 == A):

        print('平局')

    elif (res == B) and (res1 == B):

        print('平局')

    elif (res == C) and (res1 == C):

        print('平局')