Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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The image shows an error log or message from a programming environment, indicating issues found within a function. Below is a transcription of the provided content:

**File Paths and Errors:**

1. **File Path:** `C:\Users\r1821655\OneDrive\Dropbox\Screenshots\`
   - **Line:** 10 
   - **Column:** 33
   - **Function:** `void IsolateTargetSoloAsTail(Node*, int)`
   - **Error Message:** `[Error] 'countTarget' was not declared in this scope`

2. **File Path:** `C:\Users\r1821655\OneDrive\Dropbox\Screenshots\`
   - **Line:** 12
   - **Column:** 22
   - **Error Message:** `[Error] 'append' was not declared in this scope`

3. **File Path:** `C:\Users\r1821655\OneDrive\Dropbox\Screenshots\`
   - **Line:** 16
   - **Column:** 32
   - **Error Message:** `[Error] 'deleteNode' was not declared in this scope`

4. **File Path:** `C:\Users\r1821655\OneDrive\Dropbox\Screenshots\`
   - **Line:** 17
   - **Column:** 28
   - **Error Message:** `[Error] 'append' was not declared in this scope`

**Explanation:**

This log snippet can be useful for debugging code, and the errors suggest that certain functions or variables (`countTarget`, `append`, `deleteNode`) are not recognized in the given scope of the function `void IsolateTargetSoloAsTail(Node*, int)`. This may be due to missing declarations or failed imports of necessary libraries. Users should check to ensure these functions or variables are properly declared and accessible in the current context of the program.
Transcribed Image Text:The image shows an error log or message from a programming environment, indicating issues found within a function. Below is a transcription of the provided content: **File Paths and Errors:** 1. **File Path:** `C:\Users\r1821655\OneDrive\Dropbox\Screenshots\` - **Line:** 10 - **Column:** 33 - **Function:** `void IsolateTargetSoloAsTail(Node*, int)` - **Error Message:** `[Error] 'countTarget' was not declared in this scope` 2. **File Path:** `C:\Users\r1821655\OneDrive\Dropbox\Screenshots\` - **Line:** 12 - **Column:** 22 - **Error Message:** `[Error] 'append' was not declared in this scope` 3. **File Path:** `C:\Users\r1821655\OneDrive\Dropbox\Screenshots\` - **Line:** 16 - **Column:** 32 - **Error Message:** `[Error] 'deleteNode' was not declared in this scope` 4. **File Path:** `C:\Users\r1821655\OneDrive\Dropbox\Screenshots\` - **Line:** 17 - **Column:** 28 - **Error Message:** `[Error] 'append' was not declared in this scope` **Explanation:** This log snippet can be useful for debugging code, and the errors suggest that certain functions or variables (`countTarget`, `append`, `deleteNode`) are not recognized in the given scope of the function `void IsolateTargetSoloAsTail(Node*, int)`. This may be due to missing declarations or failed imports of necessary libraries. Users should check to ensure these functions or variables are properly declared and accessible in the current context of the program.
```cpp
// definition of IsolateTargetSoloAsTail of Assignment 5 Part 1
void IsolateTargetSoloAsTail(Node* headPtr, int target)
{
    if(countTarget(headPtr, target) == 0)
    {
        append(headPtr, target);
    }
    else
    {
        deleteNode(headPtr, target);
        append(headPtr, target);
    }
}
```

### Explanation:

This code snippet defines a function called `IsolateTargetSoloAsTail`. It takes two parameters: `headPtr`, which is a pointer to a `Node` (likely part of a linked list), and `target`, an integer representing the value to be manipulated within the list.

#### Functionality:

1. **Check for Occurrence**:
   - The function `countTarget(headPtr, target)` is used to determine if the `target` exists within the list.
   - If the count is `0` (i.e., the `target` does not exist in the list), the `target` is appended to the list using `append(headPtr, target)`.

2. **Modify Existing Target**:
   - If the `target` exists (i.e., count is not `0`), the `deleteNode(headPtr, target)` function removes the `target` from the list. 
   - After removal, `append(headPtr, target)` is called to add the `target` as the last element (or tail) of the list.

This coding pattern ensures that the `target` is isolated as the tail of the linked list, regardless of its initial presence or position.
Transcribed Image Text:```cpp // definition of IsolateTargetSoloAsTail of Assignment 5 Part 1 void IsolateTargetSoloAsTail(Node* headPtr, int target) { if(countTarget(headPtr, target) == 0) { append(headPtr, target); } else { deleteNode(headPtr, target); append(headPtr, target); } } ``` ### Explanation: This code snippet defines a function called `IsolateTargetSoloAsTail`. It takes two parameters: `headPtr`, which is a pointer to a `Node` (likely part of a linked list), and `target`, an integer representing the value to be manipulated within the list. #### Functionality: 1. **Check for Occurrence**: - The function `countTarget(headPtr, target)` is used to determine if the `target` exists within the list. - If the count is `0` (i.e., the `target` does not exist in the list), the `target` is appended to the list using `append(headPtr, target)`. 2. **Modify Existing Target**: - If the `target` exists (i.e., count is not `0`), the `deleteNode(headPtr, target)` function removes the `target` from the list. - After removal, `append(headPtr, target)` is called to add the `target` as the last element (or tail) of the list. This coding pattern ensures that the `target` is isolated as the tail of the linked list, regardless of its initial presence or position.
Expert Solution
Step 1

By looking at the errors we can understand the function like- 

1- If in the counttarget function there is nothing in the list then -

We have to append the target which we take.

 

2- If there is something in the list then we have to delete the node at headptr*  then append the target at the place.

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