Java洛谷P1914 小书童——密码

题目链接:https://www.luogu.com.cn/problem/P1914

代码实例:

import java.util.Scanner;
public class Main {

	public static void main(String[] args) {
		Scanner scanner = new Scanner(System.in);
		int n = scanner.nextInt();
		String str = scanner.next();
		char a[] = new char[str.length()];
		
		
		for (int i = 0; i < str.length(); i++) {
			if(n==26) {
				a[i] = str.charAt(i);
			}
			if(str.charAt(i)+n>'z' && n!=26) {
				a[i] = (char) ('a'-1+(n-('z'-str.charAt(i))));
			}
	    	if(str.charAt(i)+n<='z' && n!=26) {
				a[i] = (char) (str.charAt(i)+n);
			}
	
			System.out.print(a[i]);
		}
		scanner.close();
	}

}