
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN: 9780133594140
Author: James Kurose, Keith Ross
Publisher: PEARSON
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Question
What's the problem with the following code snippet?
See picture for details. Thank you
![## Problem Analysis with Code Snippet
### Code Snippet:
```cpp
class Key {
public:
Key(){}
void setKey(char character){
this->character = character;
}
char getKey(){
return character;
}
private:
char character;
};
class Keyboard {
public:
Keyboard(){}
private:
Key keys[104];
};
```
### Question:
What's the problem with the following code snippet?
### Answer Choices:
- Key is not an array
- Missing default constructors
- Invalid use of private data members
- No problem
- Can't embed an object within another one
### Selected Answer:
- **Invalid use of private data members**
### Explanation:
The code displays two classes, `Key` and `Keyboard`. The `Key` class includes private data members and provides public methods to interact with them. The `Keyboard` class contains an array of `Key` objects.
The highlighted issue is the "Invalid use of private data members," suggesting a concern with accessing or improperly implementing encapsulation principles. However, in this snippet, the use of private data members (`character` in `Key`) through public methods (`setKey` and `getKey`) is typical for encapsulation, and there might not be an apparent issue from the code provided. Proper context or additional constraints might be required to identify the problem correctly.](https://content.bartleby.com/qna-images/question/e4e4c829-f598-4523-ba66-76332cdb1366/6f35844a-7a12-48bb-b379-91a0619c0060/qlqb84a_thumbnail.png)
Transcribed Image Text:## Problem Analysis with Code Snippet
### Code Snippet:
```cpp
class Key {
public:
Key(){}
void setKey(char character){
this->character = character;
}
char getKey(){
return character;
}
private:
char character;
};
class Keyboard {
public:
Keyboard(){}
private:
Key keys[104];
};
```
### Question:
What's the problem with the following code snippet?
### Answer Choices:
- Key is not an array
- Missing default constructors
- Invalid use of private data members
- No problem
- Can't embed an object within another one
### Selected Answer:
- **Invalid use of private data members**
### Explanation:
The code displays two classes, `Key` and `Keyboard`. The `Key` class includes private data members and provides public methods to interact with them. The `Keyboard` class contains an array of `Key` objects.
The highlighted issue is the "Invalid use of private data members," suggesting a concern with accessing or improperly implementing encapsulation principles. However, in this snippet, the use of private data members (`character` in `Key`) through public methods (`setKey` and `getKey`) is typical for encapsulation, and there might not be an apparent issue from the code provided. Proper context or additional constraints might be required to identify the problem correctly.
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