题解 | #计算某字符出现次数#

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        String str = in.nextLine().toLowerCase();
        String car = in.nextLine().toLowerCase();
        int count = 0;

        for(int i = 0; i < str.length(); i++) {
            if(str.substring(i, i+1).equals(car)) {
                count++;
            }
        }

        System.out.println(count);
    }
}