2019-10-14日笔记

print("我爱中国")
ID = input(‘请输入那你的ID‘)
mima = input(‘请输入那你的密码‘)
print(‘我的ID是‘+ID,‘我的密码是‘+mima+‘谢谢‘)

if 5 > 4:
    print("完美")
cont = 0
flag = 0

while cont < 100:
    cont = cont + 1
    flag = cont + flag
print(flag)
1-2+3-4...99的和
cont = 0
b = 0
while cont <100:
    cont = cont + 1
    if cont%2==1:
        b = b - cont
    else:
        b = b + cont
print(b)
    ‘‘‘
输入三次不正确被锁定：

ID = 222
pss = 333
conut = 0
while conut <3:
    conut += 1
    a = input("请输入那你的ID")
    b = input("请输入那你的密码")
    if str(pss) == b and str(ID) == a:
        print("密码正确")
        break
    elif conut == 3:
        print("三次输错程序已被锁定")
    else:print("错误")

input文件输入为字符串类型