Скачать или смотреть How to Sort a 2D String Array by a Specific Column in C+ +

Learn how to sort a 2D string array based on a specific column's values in C+ + , using bubble sort as an effective method.
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How to Sort a 2D String Array by a Specific Column in C+ +

Sorting a 2D string array can be a common task in programming, especially when you want to organize your data efficiently. In this guide, we will tackle a specific problem: sorting a 2D string array based on the values of a specific column in C+ + . We'll discuss how to use bubble sort to achieve this goal without relying on complex data structures like vectors or structs.

The Challenge

Imagine you have a 2D string array derived from an external text file that contains user account details. Each row represents a user, and each column contains specific information such as email, first name, last name, and so forth.

Here's an example of the array structure we’re dealing with:

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

In this example, we're interested in sorting this array based on the last names (which are in column index 2).

The Solution: Using Bubble Sort

While the C+ + standard library provides the std::sort function, it might not work out of the box with primitive 2D arrays. Therefore, we'll implement a classic sorting algorithm called bubble sort, which is simple and effective for this use case.

Step-by-Step Implementation

Define the Array: Set up your 2D string array as shown in the above example.

Set Up the Bubble Sort Algorithm: Here’s how you can implement a bubble sort specifically targeting the last name column:

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

Explanation of the Code

Outer Loop: The outer loop runs from the last row to the first, ensuring we make the necessary comparisons.

Inner Loop: The inner loop compares adjacent rows based on the last name. If the current last name (accountsArr[i][2]) is greater than the next (accountsArr[i + 1][2]), we will swap the two rows using the swap function.

Output: Finally, we print the sorted array to verify the output.

Conclusion

Sorting a 2D string array by a specific column can be achieved efficiently with the bubble sort algorithm. While the method may seem quite straightforward, it serves as a great exercise for understanding array manipulation in C+ + . You can always enhance your sorting approach with more complex algorithms for larger datasets, but bubble sort works wonderfully for simpler and smaller arrays like the one we discussed.

Now you should have the tools you need to tackle sorting arrays in C+ + . Happy coding!