Скачать или смотреть Fixing Runtime Errors in Linked List Node Deletion

Learn how to effectively debug and fix runtime errors when deleting nodes from a linked list in C+ + .
---
This video is based on the question https://stackoverflow.com/q/68550391/ asked by the user 'Saurav singh' ( https://stackoverflow.com/u/13917796/ ) and on the answer https://stackoverflow.com/a/68550745/ provided by the user 'trincot' ( https://stackoverflow.com/u/5459839/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

Visit these links for original content and any more details, such as alternate solutions, latest updates/developments on topic, comments, revision history etc. For example, the original title of the Question was: I am trying to delete a node from Linked List ,but some run time error is there

Also, Content (except music) licensed under CC BY-SA https://meta.stackexchange.com/help/l...
The original Question post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license, and the original Answer post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license.

If anything seems off to you, please feel free to write me at vlogize [AT] gmail [DOT] com.
---
Debugging Linked List Node Deletion Issues

When working with linked lists in programming, it’s common to encounter runtime errors, particularly when attempting to delete nodes. A user faced such an error while trying to remove a node from their linked list. In this guide, we’ll explore the problem they encountered and how to effectively solve it.

The Problem

The user shared a snippet of code where they tried to delete a node based on its position from the end. They noticed that, during iteration, the value of current->val was not printing as expected in the while loop. This indicated that something was wrong in the logic of their linked list code.

Key Points to Understand

Linked lists are a data structure comprising nodes, each containing a value and a pointer to the next node.

Properly managing pointers and conditions is critical to avoid runtime exceptions.

The Solution

Identifying the Issues

After reviewing the provided code, several critical issues were identified:

Incorrect Pointer Check:
The condition to check if the next pointer of the head node is null was incorrectly written:

[[See Video to Reveal this Text or Code Snippet]]

This should use == for comparison:

[[See Video to Reveal this Text or Code Snippet]]

Incorrect Boundary Condition:
The condition that checks if the node to be deleted is the head node when B equals count was also faulty. The condition should allow for the scenario when B is greater than or equal to count.

[[See Video to Reveal this Text or Code Snippet]]

Iteration Logic:
The while loop intended to navigate to the desired node was set to iterate one time more than necessary. The correct condition should be:

[[See Video to Reveal this Text or Code Snippet]]

Updated Code

Here’s how the corrected code would look with all the changes applied:

[[See Video to Reveal this Text or Code Snippet]]

Conclusion

Debugging linked lists can be tricky, but with a systematic approach to identifying and correcting issues, you can resolve most runtime errors. Remember to:

Carefully check your conditions and iterations.

Use comparison operators correctly.

Test each part of your code incrementally to see how changes affect your results.

By following these tips and the corrections discussed, you can better manage linked list node deletions in your C+ + programs, leading to fewer runtime errors and smoother code execution.

If you’re still facing issues or have questions, don’t hesitate to reach out for further assistance!