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 str=in.nextLine();
        String ch=in.next();
        int num=0;
        for(int i=0;i<str.length();i++){
            if(str.charAt(i)==ch.charAt(0)){
                num++;
            }else if(65<=str.charAt(i)&&str.charAt(i)<=122&&str.charAt(i)+32==ch.charAt(0)&&65<=ch.charAt(0)&&ch.charAt(0)<=122){
                num++;
            }else if(65<=str.charAt(i)&&str.charAt(i)<=122&&str.charAt(i)-32==ch.charAt(0)&&65<=ch.charAt(0)&&ch.charAt(0)<=122){
                num++;
            }
        }
        System.out.println(num);
    }
}