我是java初学者，大神帮忙解答我写的递归函数哪里错了？

Question

package com.jian.action;

public class Action {
static int count = 0,i=0;
public static void digui(String num){
char[] num1 = num.toCharArray();
if(count<num1.length-1){
if (num1[i]=='a') {
count++;
}i++;
System.out.println(i);
digui(num);
}
}

public static void main(String[] args) {
    digui("aaafdtfdsg");
    System.out.println("a的个数："+count);

}

}

Answer 1

你一直在执行d igui(num); num未曾改变