题解 | #字符串加解密#

import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        // 注意 hasNext 和 hasNextLine 的区别
        while (in.hasNext()) { // 注意 while 处理多个 case
            String a = in.next();
            String b = in.next();
            System.out.println(ev(a, 1));
            System.out.println(ev(b, -1));
        }
    }

    //abcdefg
    //BCDEFGH
    private static String ev(String str, int offset) {
        int x = 0;
        int y = 0;
        char[] arr = str.toCharArray();
        String r = "";
        for (char s: arr) {
            if (s>=48 && s<=57) {
                int z = Integer.parseInt(s + "");
                z += offset + 10;
                z = z % 10;
                s = (z+ "").charAt(0);
            }
            else if (s>=65&&s <=90) s = (char) (s + 32 + offset);
            else if(s>=97&&s<=122) {
                s = (char) (s - 32 + offset);
            }
            if (s == '@') s = 'Z';
            if (s == '`') s = 'z';
            if (s == '[') s = 'A';
            if (s == '{') s = 'a';
            r += s;
        }
        return r;
    }
}