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 source_v = in.nextLine().toUpperCase();
        String char_v = in.next().toUpperCase();
        int sum = 0;
        for (int i = 0; i < source_v.length(); i++) {
            if (source_v.charAt(i) == char_v.charAt(0)) {
                sum++;
            }
        }
        System.out.println(sum);
    }
}