行业动态

Python:

```python

def register_user(username, password):

"""

Registers a new user.

Args:

username (str): The username of the new user.

password (str): The password of the new user.

Raises:

ValueError: If the username is already taken.

"""

Check if the username is already taken

if username in users:

raise ValueError("Username already taken")

Create a new user object

user = User(username, password)

Add the new user to the list of users

users.append(user)

```

Java:

```java

public void registerUser(String username, String password) {

// Check if the username is already taken

if (users.containsKey(username)) {

throw new IllegalArgumentException("Username already taken");

}

// Create a new user object

User user = new User(username, password);

// Add the new user to the map of users

users.put(username, user);

}

```

C:

```csharp

public void RegisterUser(string username, string password)

{

// Check if the username is already taken

if (users.ContainsKey(username))

{

throw new ArgumentException("Username already taken");

}

// Create a new user object

User user = new User(username, password);

// Add the new user to the dictionary of users

users.Add(username, user);

}欧盟万宝路黑绿

```

PHP:

```php

public function registerUser(string $username, string $password)

{

// Check if the username is already taken

if (isset($this->users[$username])) {

throw new Exception("Username already taken");

}

// Create a new user object罐装珠港澳大桥

$user = new User($username, $password);

// Add the new user to the array of users

$this->users[$username] = $user;

}

```