求个学Java的解个题，我输入0最小值就总是为0

Question

这是题目，怎么写，给个思路或者给个代码

Answer 1

public class Max {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        System.out.print("请开始输入数据（输入0时结束循环）:");
        int num=0;
        num=sc.nextInt();
        int max=num;
        int min=num;
        while(num!=0){
            if (max<num){
                max=num;
            }else if (min>num){
                min=num;
            }
            System.out.print("请开始输入数据（输入0时结束循环）:");
            num=sc.nextInt();
        }
        System.out.println("最大值是："+max);
        System.out.println("最小值是："+min);
    }
}