2018-12-19第二题

效果

图片发自简书App

代码

Console.WriteLine("请输入10个数字");
            int[] nums = new int[10];
            int [] count={0,0,0,0};
            try
            {
                for (int i = 0; i < nums.Length; i++)
                {
                    Console.Write("请输入第{0}个数字：", i + 1);
                    nums[i] = Convert.ToInt32(Console.ReadLine());
                    switch (nums[i])
                    {
                        case 1:
                            count[0]++;
                            break;
                        case 2:
                            count[1]++;
                            break;
                        case 3:
                            count[2]++;
                            break;
                        default:
                            count[3]++;
                            break;
                    } 
                }
                Console.WriteLine("数字1的个数：{0}", count[0]);
                Console.WriteLine("数字2的个数：{0}", count[1]);
                Console.WriteLine("数字3的个数：{0}", count[2]);
                Console.WriteLine("非法数字的个数：{0}", count[3]);
            }
            catch
            {
                Console.WriteLine("输入格式错误");
            }
            Console.ReadKey();