Code
#include <bits/stdc++.h>
using namespace std;
class  CharShift{
// Function to shift each character by 1 (with wrap-around at 'z' and 'Z')
string solve(string str, int length) {
  for (int i = 0; i < length; i++) {
    int ascii = (int)(str[i]);  // Get ASCII value

    if (ascii == 90)            // If 'Z', wrap to 'A'
      str[i] = char(65);

    else if (ascii == 122)      // If 'z', wrap to 'a'
      str[i] = char(97);

    else if ((ascii >= 65 && ascii < 90) || (ascii >= 97 && ascii < 122))
      str[i] = char(ascii + 1);  // Shift to next character
  }
  return str;
}

int main() {
  string str = "abcdxyz";
  int length = str.length();

  cout << "Original String: " << "\n";
  cout << str << endl;

  cout << "New string: " << "\n";
  cout << solve(str, length) << "\n";

  return 0;
}
public class CharShift {
    static String solve(String str, int length) {
        StringBuilder result = new StringBuilder();

        for (int i = 0; i < length; i++) {
            char ch = str.charAt(i);
            int ascii = (int) ch;  // Get ASCII value

            if (ascii == 90)  // If 'Z', wrap to 'A'
                result.append((char) 65);
            else if (ascii == 122)  // If 'z', wrap to 'a'
                result.append((char) 97);
            else if ((ascii >= 65 && ascii < 90) || (ascii >= 97 && ascii < 122))
                result.append((char) (ascii + 1));  // Shift to next character
            else
                result.append(ch);  // Leave other characters unchanged
        }

        return resu