HJ105 记负均正II | 题解
import java.util.Scanner; public class Main { public static void main(String[] args) { Scanner in = new Scanner(System.in); int pNum = 0, nNum = 0; double sum = 0; while (in.hasNext()) { int num = in.nextInt(); if (num >= 0) { pNum++; sum += num; } else { nNum++; } } System.out.println(nNum); if (pNum == 0) { System.out.println(0.0); } else { System.out.printf("%.1f\n", sum / pNum); } } }