大神帮看下我的代码哪里错了？

Question

题目是编写程序，读入未指定个数的整数，判断读入的正数和负数分别有多少个，然后计算这些输入值的总和及其平均值（不对0计数）。当输入为0时，表明程序结束。将平均值以浮点数显示。

import java.util.Scanner;
public class TextXXXXX {
public static void main (String[] args){
Scanner input = new Scanner(System.in);
int count1 = 0 , count2 = 0 , sum = 0 , num;
double avg;
System.out.print("请输入一个整数，输入0时结束:");
num = input.nextInt();
while(num != 0){
System.out.print("请输入一个整数，输入0时结束:");
num = input.nextInt();
while(num > 0)
count1+=1;
while(num < 0)
count2+=1;
sum+=num;
}
avg = sum /(count1 + count2);
System.out.println("整数个数为：" + count1 + " 负数个数为：" + count2);
System.out.println("和为：" + sum);
System.out.println("平均值为："+ avg);
}
}

Answer 1

 public static void main(String[] args) {
        int count1 = 0, count2 = 0, sum = 0, num;
        double avg;
        for (int i = 1; i >0; i++) {
            Scanner input = new Scanner(System.in);
            System.out.print("请输入一个整数，输入0时结束:");
            num = input.nextInt();
            if (num > 0)
                count1 += 1;
            if (num < 0)
                count2 += 1;
            if(num==0){
                break;
            }
            sum += num;

        }
        avg = sum*1.0 / (count1 + count2);
        System.out.println("整数个数为：" + count1 + " 负数个数为：" + count2);
        System.out.println("和为：" + sum);
        System.out.println("平均值为：" + avg);

    }