Rotate Arrays in Java: Troubleshooting 90 Degree Left Rotation Code

[physicsfun]

Homework Statement

Write code to rotate an array...

Homework Equations

why is this code not rotating my array 90 degrees to the left? thanks SO much in advance!

The Attempt at a Solution

public static int[][] rotateLeft(int[][] source) {
int[][] result = new int[source.length][source[0].length];
for (int i = 0; i < result.length; i++) {
for (int k = 0; k < result[0].length; k++) {
result[k] = source[source.length-1-i];}}
return result;}

 

[mathmate]

Do you see anything here:

result[i][k] = source[source.length-1-i][i];}}

 

[Mene]

There are a few potential issues with this code. First, it seems that you are only rotating the array once, instead of the desired 90 degrees. To rotate an array 90 degrees to the left, each element needs to move to a new position that is 90 degrees to the left of its current position. This means that you need to swap the rows and columns of the array. Your code currently only swaps the rows, but does not change the columns.

Another issue is that your code assumes that the input array is a perfect square (same number of rows and columns). This may not always be the case and could cause errors.

To fix these issues, you could try using a temporary variable to store the value of the current element before swapping it with the new element. You could also consider using a nested for loop to iterate through both the rows and columns of the array.

Additionally, you may want to consider using a more efficient algorithm for rotating arrays, such as the "in-place" rotation method, which does not require creating a new array.

Overall, it is important to carefully consider the logic and potential edge cases when writing code to rotate arrays. I recommend trying out different approaches and debugging your code to identify and fix any errors. Good luck!