了解C#集合，掌握集合應用


static void Main(string[] args)
        {


            List<int> nums = new List<int>();
            while (true)
            {
                Console.WriteLine("集合中現有的內容如下:");
                Console.WriteLine("=============================");
                
 
if (nums.Count == 0)
                {
                    Console.WriteLine("集合中沒有元素");
                }
                else
                {
                    foreach (int i in nums)
                    {
                        Console.Write(i + "\t");
                    }
                    Console.WriteLine();
                }

                Console.WriteLine(
 
"=============================");

                Console.WriteLine("1.添加數據");
                Console.WriteLine("2.刪除數據");
                Console.WriteLine("3.修改數據");
                Console.WriteLine("4.升序排序");
                Console.WriteLine("0.退出程序");
                Console.Write("請選擇（0-4）:");

                
 
int b = int.Parse(Console.ReadLine());
            
                if (b == 1)
                {

                    Console.Write("請輸入要添加的數據:");
                    int i = int.Parse(Console.ReadLine());
                    nums.Add(i);
                }


                if (b == 2)
                {


                    Console.Write("請輸入要刪除的數據(只會刪除第一個匹配項）:");
                    int j = int.Parse(Console.ReadLine());
                    nums.Remove(j);
                }
                if (b == 3)
                {
                    Console.Write("請輸入要刪除的下標（0-" + (nums.Count - 1) + "):");
                    int k = int.Parse(Console.ReadLine());
                    if (0 <= k && k < nums.Count)
                    {
                        Console.Write("請輸入新的數據:");
                        int l = int.Parse(Console.ReadLine());
                        nums[k] = l;
                    }

                    else
                    {
                        Console.Write("輸入錯誤，下標超出範圍，按回車鍵繼續");
                        Console.ReadLine();
                    }
                }

                    if (b == 4)
                    {
                        for (int w = 0; w < nums.Count - 1; w++)
                        {
                            for (int m = w + 1; m < nums.Count; m++)
                            {
                                if (nums[w] > nums[m])
                                {
                                    int temp = nums[w];
                                    nums[w] = nums[m];
                                    nums[m] = temp;
                                }
                            }
                        }
                    }

                        if (b == 0)
                        {
                            break;
                        }
                        Console.Clear();    
            }
      


            }
        
      

C#集合管理器