Java写题解的第5天 | #记负均正#

遍历输入并计算，通过率低的原因大概是很多没有考虑输入有0存在的情况吧。（确实第一眼看题目以为没有0输入）

代码于2022年7月9日更新：添加了对于正数个数为0的情况下的判断

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        while (sc.hasNext()) {
            int n = sc.nextInt();
            int countNegative = 0;
            int countPositive = 0;
            int sum = 0;
            for (int i = 0; i < n; i++) {
                int number = sc.nextInt();
                if (number < 0) {
                    countNegative++;
                } else if (number > 0){
                    sum += number;
                    countPositive++;
                }
            }
            double average = countPositive == 0? 0.0 : sum * 1.0 / countPositive;
            System.out.println(countNegative + " " + String.format("%.1f", average));
        }
        sc.close();
    }
}