Lesson2

Yep, my first home work, i am happy that i worked #13 out independently：）

7.利用if语句写出猜大小的游戏：
设定一个理想数字比如：66，让用户输入数字，如果比66大，则显示猜测的结果大了；如果比66小，则显示猜测的结果小了;只有等于66，显示猜测结果正确。

a = 66
for i in range(1,4):
    b = float(input('pls guess the number:'))
    if b>a:
        print('too big')
    elif b<a:
        print('too small')
    else:
        print('you got it')
        break

"""9.提示用户输入麻花藤. 判断用户输入的对不对. 如果对, 提示真聪明, 如果不对, 提示你 是二货么"""
a = input("pls input 'hello':")
if a == 'hello':
    print("good job, clever boy!")
else:
    print("what's wrong with you?")

"""12.求1-2+3-4+5 ... 99的所有数的和"""
a = 0
b = 0
for i in range(1,100):
    if i%2==0:
        a-=i
    else:
        b+=i
print(a+b)

"""13.用户登陆(三次输错机会)且每次输错误时显示剩余错误次数
(提示：使用字符串格式化)"""

user = "admin"
password = "123"

for i in range(1,4):
    a = input("pls input user name:")
    b = input("pls input password:")
    if a ==user and b == password:
        print("you really a lucky boy!")
        break
    else:
        m = 3 - i
        if m != 0:
            print("wrong user name or password, you can try %d more times"%m)
        else:
            print("wrong again, no chance anymore, pls contact administrator")

# (6)一个循环 打印十行十列隔行变色小星星(一个循环)
for i in range(0,100):
    m=i//10
    if m%2==0:
        print('★', end='')
    else:
        print('☆', end='')
    if i%10==9:
        print()

#打印九九乘法表
for i in range(1,10):
    for j in range(1,i+1):
        m=i*j
        print('%d*%d=%d '%(i,j,m), end='')
        if j==i:
            print()