1064错完了

1064输入单个字符

char c =sc.next().charAt(0);    //只接收字符串的第一个字符

又错了

import java.util.Scanner;
public class demo1 {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        String c =input.next();
        for (int i = 0; i < c.length(); i++) {
            char ch = c.charAt(i);
            if(ch>='A'&&ch<='Z'){
                ch+=32;
            }
            if(ch>='a'&&ch<='y'){
                ch+=1;
            }else if(ch=='z'){
                ch='a';
            }else if(ch=='@'){
                break;
            }
            System.out.print(ch);
        }
    }
}

1065生气

public class demo1 {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        String c =input.next();
        int k = 0;
        for (int i = 0; i < c.length(); i++) {
            int ch = (int) c.charAt(i);
            if(ch<=57&&ch>=48) k+=1;
            else if(ch == 10) break;
        }
        System.out.println(k);
    }
}

气死我了QAQ