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 scanner = new Scanner(System.in);
        String str = scanner.nextLine();
       String target = scanner.nextLine();
        char c = target.charAt(0);
        int res=0;
        int length = str.length();
        for (int i = 0; i <length ; i++) {
            if (str.toLowerCase().charAt(i)==c||str.toUpperCase().charAt(i)==c){
                res++;
            }
        }
        System.out.println(res);
    }
}