Скачать или смотреть How to Assign Child Properties Without Affecting Parent in C+ +

Discover how to easily assign child properties in C+ + without modifying their parent properties. Learn the best practices for object-oriented programming in this guide!
---
This video is based on the question https://stackoverflow.com/q/77936651/ asked by the user 'Kayla' ( https://stackoverflow.com/u/15394912/ ) and on the answer https://stackoverflow.com/a/77936696/ provided by the user 'Irelia' ( https://stackoverflow.com/u/8350647/ ) 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: Assign child properties without effecting parent?

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.
---
Assign Child Properties Without Affecting Parent in C+ +

When working with object-oriented programming in C+ + , it’s common to have classes that inherit from one another. This can create situations where you want to modify a child class's properties without inadvertently changing their associated parent class properties. In this guide, we'll explore a practical solution to this problem using C+ + code examples.

The Problem: Overwriting Properties

Consider you have a parent class called Parent, and a child class named Child which inherits from Parent. Each class has its own set of properties. When you create instances of the Child class, you may want to copy properties from one child to another while ensuring that the parent properties remain unchanged. Here's an overview of the example structure:

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

You might set up your child classes like this:

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

However, if you attempt to assign properties from Child b to Child a using the following method, you'll end up overwriting the parent properties, which is not desired:

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

Desired Outcome

Your goal is to achieve the following output without altering the parent properties of the Child class instances:

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

The Solution: Copying Parent Properties

To solve this, you can make a temporary copy of the parent properties before overwriting the child properties. Here’s how you can do that:

Step-by-Step Breakdown

Create a Temporary Parent Object: When you need to overwrite child properties, start by saving the essential parent properties of Child b in a temporary variable.

Overwrite Child Properties: Proceed to overwrite the child properties directly.

Restore Parent Properties: Finally, restore the parent properties of Child b using the temporary variable you created at the beginning.

Implementation

Here’s how the code would look after applying this solution:

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

Final Main Function

Here’s how the entire program would look, including the main function to demonstrate the output:

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

Expected Output

By running the program above, the output will be correctly modified as:

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

Conclusion

Using C+ + 's object-oriented features effectively allows you to work with parent and child class properties without unintentional modifications. By preserving parent properties using a temporary variable, you can neatly manage class properties and maintain the integrity of your objects. This technique is essential for maintaining clean and efficient object-oriented code in your projects.

Feel free to experiment with this example in your own C+ + projects, and see how managing inheritance can bring elegance and strength to your programming practice!