python-Exercise 4

Topic 1: User Management system V2:

User functions are as follows:
Welcome to XXXX System

-1. Registration: If the user exists, the direct error "name already exists", if the user does not exist, save the user information, display "registration success";
-2. Login: If the user exists, determine whether the password is correct, if the user does not exist, the error "name does not exist";
-3. Logout: If the user exists, delete the user information, if not present, error error "name does not exist;
-4. Exit: Break

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Topic 2: User Management system V3:

Initialize has a system administrator:
The user is divided into two types:
User login:
-Login
-Exit

To determine the user type:
System administrator Features:
-1. Add User
-4. View all user Information
-5. Exit:
General User features:
-1. View personal Information
-2. Logout
-2. Exit

Requirements:
1. According to the user's identity, access to different management interface;
2. The system initializes a system administrator account;
3. Only the system administrator can add users and view all user information;
4. Ordinary users can only view personal information, and write-off account;

Welcome to XXX System
-1. Registration:
-2. Login:
-3. Logout:
-4. View all user Information
-5. Exit:

python-Exercise 4