Given an array and a number k, the problem states that we need to rotate the array k times.
If the given number is 3, the array must be rotated 3 times.
Create a function reverse that takes an array, starting position, and ending position as parameters.
In the first step, the reverse method is called from 0 to the length of the array.
In the second step, the reverse method is called from 0 to k-1.
In the third step, the reverse method is called from k 1 to the array length.
Demonstration
using System;
namespace ConsoleApplication{
public class Arrays{
public void ReverseArrayKTimes(int[] arr, int k){
Reverse(arr, 0, arr.Length - 1);
Reverse(arr, 0, k - 1);
Reverse(arr, k, arr.Length - 1);
}
private void Reverse(int[] arr, int start, int end){
while (start < end){
int temp = arr[start];
arr[start] = arr[end];
arr[end] = temp;
start++;
end--;
}
}
}
class Program{
static void Main(string[] args){
Arrays a = new Arrays();
int[] arr = { 9, 8, 7, 6, 5, 4, 3, 2, 1 };
a.ReverseArrayKTimes(arr, 3);
for (int i = 0; i < arr.Length; i++){
Console.WriteLine(arr[i]);
}
Console.ReadLine();
}
}
}3 2 1 9 8 7 6 5 4
The above is the detailed content of How to rotate an array k times using C#?. For more information, please follow other related articles on the PHP Chinese website!
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
