用空格开始新行

Question

I'm stuck at this problem I would really appreciate if someone can help me solve this problem.

1. I want to add spaces for sub-folder like this format down below.(it must be done with recursion)

2. I want to add spaces for sub-folder like this format down below.(it must be done with recursion)

    using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; using System.IO; namespace G14_211115 { class Program { static void Main(string[] args) { string path = @"C:\\Program Files\\FinchVPN"; WriteDirectories(path); Console.ReadKey(); } /* Tasks. * 1. I want to add spaces for subfolder like this format down below. ( it must be done with recursion) * Like this * -------------------------------------------------------------- * Folder 1 * Folder 1.1 * Folder 1.2 * Folder 2 * Folder 2.1 * Folder 2.1.1 * Folder 2.2 * Folder 3 * Folder 4 * * 2. Task 2 I want to retype this code without using recurrence and C# inbuilt functions. */ static void WriteDirectories(string path) { string[] dirs = Directory.GetDirectories(path); for(int i = 0; i < dirs.Length; i++) { Console.WriteLine(dirs[i]); WriteDirectories(dirs[i]); } } } } 

Answer 1

As you are calling WriteDirectories recursivly, you can pass a variable to each call indicating the (recursion)level . Using this you can just put some spaces before the output.

Therefore you would need to modify your code like this:

static void WriteDirectories(string path, int level = 0)
{
    string[] dirs = Directory.GetDirectories(path);

    for (int i = 0; i < dirs.Length; i++)
    {
        for (int j = 0; j < level; j++)
        {
            Console.Write(" ");
        }

        Console.WriteLine(dirs[i]);
        WriteDirectories(dirs[i], (level + 1));
    }
}

If you want more than just one space per level you can simply modify the inner loop, j < 2 * level would give you 2 space characters per level, and so on.

Update (Thanks to David)

Instead of the inner loop you can use new string(' ', level) for creating a new string containing the specified character level -times.

So the inner for -loop would be replaced by Console.Write(new string(' ', level)); .

Answer 2

just provide a depth-parameter to your recursive call and add spaces according to the depth.

       static void WriteDirectories(string path, int depth) {
            string[] dirs = Directory.GetDirectories(path);
            for(int i = 0; i < dirs.Length; i++) {
                 string preSpaces = new String(' ',depth);
                 Console.WriteLine(preSpaces + dirs[i]); 
                 WriteDirectories(dirs[i], depth+1);
            }
       }

Your first call should provide 0 or 1 as depth.