Скачать или смотреть Rearranging Arrays in C: A Guide to Separating Negative and Positive Numbers

Learn how to rearrange arrays in C by separating negative and positive numbers while maintaining their order. Get a step-by-step explanation with sample code!
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Rearranging Arrays in C: A Guide to Separating Negative and Positive Numbers

When it comes to working with arrays in C, manipulating the contents to achieve a desired outcome is a common task. One challenge many programmers face is rearranging an array to separate negative from positive numbers, while keeping their original order intact.

If you've ever encountered issues where your program does not produce the expected results—such as showing zeros instead of positive numbers—you’re not alone. In this post, we’ll explore a correct approach to solving this problem, complete with an example for better understanding.

The Problem: Rearranging an Array

You might have a given array, for instance:

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

Your goal is to rearrange this array such that:

All negative numbers are on the left side.

All positive numbers are on the right side.

The order of negative and positive numbers remains unchanged.

The Solution: Step-by-Step Breakdown

1. Setting Up the Function

We will create a function called moveNegativeToFront, which accepts the initial array, the result array, and the length of the array. This function will perform the rearrangement.

2. Implementing Two Loops

To achieve our goal, we’ll use two loops:

First Loop: This loop will copy all negative numbers from the original array to the result array.

Second Loop: This subsequent loop will append all positive numbers.

Code Implementation

Here’s how this solution looks in C:

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

Output

When you execute the above code, you will receive the following output:

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

Explanation of the Process

Initialization: We declare our numArr and resultArr arrays. The integer j is initialized to 0 and will help track the index for inserting elements into the resultArr.

First Loop:

This loop iterates through each element of numArr.

If the element is negative, it is placed in the resultArr and j is incremented.

Second Loop:

Similar to the first, but this one checks for non-negative elements and places them in the resultArr at the next index tracked by j.

Conclusion

By following these steps, you can easily rearrange an array in C to separate negative and positive numbers while maintaining their order. This solution avoids overwriting or misplacing elements, providing straightforward functionality for array manipulation.

If you encounter any issues or need further clarification, feel free to reach out!