hello-algo/codes/csharp/chapter_array_and_linkedlist/list.cs

68 lines
2 KiB
C#
Raw Normal View History

/**
* File: list.cs
* Created Time: 2022-12-23
* Author: haptear (haptear@hotmail.com)
*/
namespace hello_algo.chapter_array_and_linkedlist;
public class list {
[Test]
public void Test() {
2022-12-23 15:42:02 +08:00
/* 初始化列表 */
int[] numbers = new int[] { 1, 3, 2, 5, 4 };
List<int> list = numbers.ToList();
Console.WriteLine("列表 list = " + string.Join(",", list));
2022-12-23 15:42:02 +08:00
/* 访问元素 */
int num = list[1];
Console.WriteLine("访问索引 1 处的元素,得到 num = " + num);
2022-12-23 15:42:02 +08:00
/* 更新元素 */
list[1] = 0;
Console.WriteLine("将索引 1 处的元素更新为 0 ,得到 list = " + string.Join(",", list));
2022-12-23 15:42:02 +08:00
/* 清空列表 */
list.Clear();
Console.WriteLine("清空列表后 list = " + string.Join(",", list));
2022-12-23 15:42:02 +08:00
/* 尾部添加元素 */
list.Add(1);
list.Add(3);
list.Add(2);
list.Add(5);
list.Add(4);
Console.WriteLine("添加元素后 list = " + string.Join(",", list));
2022-12-23 15:42:02 +08:00
/* 中间插入元素 */
list.Insert(3, 6);
Console.WriteLine("在索引 3 处插入数字 6 ,得到 list = " + string.Join(",", list));
2022-12-23 15:42:02 +08:00
/* 删除元素 */
list.RemoveAt(3);
Console.WriteLine("删除索引 3 处的元素,得到 list = " + string.Join(",", list));
2022-12-23 15:42:02 +08:00
/* 通过索引遍历列表 */
int count = 0;
for (int i = 0; i < list.Count; i++) {
count++;
}
2022-12-23 15:42:02 +08:00
/* 直接遍历列表元素 */
count = 0;
foreach (int n in list) {
count++;
}
2022-12-23 15:42:02 +08:00
/* 拼接两个列表 */
List<int> list1 = new() { 6, 8, 7, 10, 9 };
list.AddRange(list1);
Console.WriteLine("将列表 list1 拼接到 list 之后,得到 list = " + string.Join(",", list));
2022-12-23 15:42:02 +08:00
/* 排序列表 */
list.Sort(); // 排序后,列表元素从小到大排列
Console.WriteLine("排序列表后 list = " + string.Join(",", list));
2022-12-23 15:42:02 +08:00
}
}