Please design the ¡§Classes¡¨ that will work together for the implementation of the User Case ¡§Validate User¡¨ in the ATM machine.
its just want us o write a diagram..
To implement the User Case "Validate User" in an ATM machine, we can design the following classes that work together:
1. User Class:
- Attributes: username, PIN, accountNumber
- Operations: validatePIN(), getAccountNumber()
2. ATM Class:
- Attributes: none
- Operations: validateUser(User user), displayMainMenu()
3. Bank Class:
- Attributes: users (a list of User objects)
- Operations: addUser(User user), removeUser(User user), getUserByUsername(String username)
The relationships between these classes can be represented in a class diagram as follows:
```
+-----------------+ +------------------+
| User |1------* | Bank |
+-----------------+ +------------------+
| - username | | - users: List<User> |
| - PIN | | + addUser(User) |
| - accountNumber | | + removeUser(User) |
| | | + getUserByUsername(username: String): User |
| + validatePIN() | +------------------+
| + getAccountNumber() |
+-----------------+ +-----------------+
^ | |
| | |
| | |
| | |
| | |
| | |
| | |
+-----------------+ +-----------------+
| ATM | | Bank |
+-----------------+ +-----------------+
| | | |
| + validateUser(user: User) | | |
| + displayMainMenu() | | |
+-----------------+ +-----------------+
```
The User class represents a user of the ATM, with attributes such as username, PIN, and account number. It also has operations to validate the PIN and retrieve the account number.
The ATM class represents the ATM machine itself. It has an operation to validate a user, which takes a User object as input. It also has an operation to display the main menu.
The Bank class manages the list of users. It has operations to add, remove, and retrieve users by their username.
Note: This is a simplified representation and may not include all attributes and operations. You can add more attributes and operations as per your specific requirements.