如何用立即字符替换字符串的下一个字符

Question

I am trying to replace next character of string with immediate character. For example, given string is "HOME"

required string should be "EHOM" ,

Is it possible to do it without any replace function.

Answer 1

Seems like just moving the last character in front:

string s = "HOME";
s = s.Last() + s.Remove(s.Length - 1);   // "EHOM"

Answer 2

approach "doing everything on foot":

make a char array as long as your string ... (no trailing null)

have a for loop with the index i go through the array

calculate the replacement position r = i - 1 + len(array) mod len(array)

fetch char from position r in the original string

put fetched char at position i of your array

end of loop

make a string from your array

Answer 3

Basic string functions:

    string x = "Home";
    string y = x.Substring(x.Length - 1, 1) + x.Substring(0, x.Length - 1);

Please note that you should declare a new string to respect immutability.