编辑代码

using System;

public class HelloWorld
{
    public static void Main()
    {
        int A = 2542;
        int thousand = A/10/10/10%10;
        int hundred = A/10/10%10;
        int ten = A/10%10;
        int one = A%10;
        
        Console.WriteLine(thousand);
        Console.WriteLine(hundred);
        Console.WriteLine(ten);
        Console.WriteLine(one);
        
    }
}