day03 作业

请输出 name 变量对应的值中 "e" 所在索引位置?

# name = "leX leNb"
# num = 0
# while num < len(name):
#     b = name.find("e", num, len(name))
#     if b > 0 :
#         print("e",":",b)
#     else :
#         break
#     num = b + 1

# name = "leX leNb"
# count = 0
# for c in name :
#     count += 1
#     if c == "e" :
#         print(count-1)

实现一个整数加法计算器(两个数相加或者多个数)：

content = input("请输入内容（如 1+2 ）：
")
a = content.replace("+"," ").split()
sum = 0
for i in a:
    if i.isdigit():
        b = int(i)
        sum += b
print(sum)

# content = input("输入一个字符串：")
# a = 0#数字个数
# e = 0
# f = 0
# for i in content:
#     if i.isdigit():
#        a += 1
# n = content.upper()
# m = content.lower()
# flag = 0#小写
# flag1 = 0#大写
# for i in content:
#     if content[e] != n[e]:
#         flag += 1
#     elif content[f] != m[f]:
#         flag1 += 1
#     f += 1
#     e += 1

# count = len(content)
# count2 = count - a - flag - flag1#其他
# print(a,flag,flag1,count2)

#周末作业 用户登录验证
# 1. 系统自动生成4位随机数. 作为登录验证码. 直接用就好.
# 这里不用纠结  提示. 生成随机数的办法.
# 2. 用户输入用户名和密码还有验证码.
# 3. 用户可以有三次登录的机会.但是验证码如果输入错误.不计算在内.

from random import randint
# num = 0
# verify_code = ""#验证码
# while num < 4:
#     verify_code += chr(randint(65, 90))
#     num += 1
# # print(verify_code)  # 四位随机验证码

real_name = 'admin'
real_password = '123'
count = 0
flag = 0
while count <3:
    name = input("请输入你的用户名：
")
    password = input("请输入你的密码：
")
    # print("验证码：",verify_code)
    while True:
        num = 0
        verify_code = ""  # 验证码
        while num < 4:
            verify_code += chr(randint(65, 90))
            num += 1
        # print(verify_code)  # 四位随机验证码
        print("验证码：", verify_code)
        code = input("请输入相应的验证码：
")
        if code.upper()==verify_code:
            if name == real_name and password == real_password:
                print("登录成功")
                flag = flag + 1
                break
            else:
                print("你输入的账号或密码输入错误，登录失败")
                count += 1
                break
        else:
            print("验证码输入错误，请重新输入")
            continue
    if flag == 1:
        break
    if count <= 2:
        print("你还有%s次机会。" % (3 - count))
    else:
        print("你已经用完了机会，OUT！")
        break