Add one space after every two characters and add a character infront of every single character

Question

I want to add one space after every two characters, and add a character in front of every single character.

This is my code:

string str2;
str2 = str1         


        

Answer 1

Try something like this:

static string ProcessString(string input)
{
    StringBuilder buffer = new StringBuilder(input.Length*3/2);
    for (int i=0; i0) & (i%2==0))
            buffer.Append(" ");
        buffer.Append(input[i]);
    }
    return buffer.ToString();
}

Naturally you'd need to add in some logic about the extra numbers, but the basic idea should be clear from the above.