题解 | #计算某字符出现次数#

import java.util.Scanner;

// 注意类名必须为 Main, 不要有任何 package xxx 信息
public class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        
        String s = in.nextLine();
        String c = in.nextLine();

        char ch = c.charAt(0);

        char[] words = s.toCharArray();

        int num = 0;

        for(char word : words){
            if(Character.toLowerCase(word) == Character.toLowerCase(ch))
                num++;
        }

        System.out.println(num);

        in.close();
    }
}