相关的知识点 如何编程实现随机数 import java.util.*; class TestRandom { public static void main(String[] args) { Random random = new Random(); for(int i = 0; i < 10;i++) { System.out.println(Math.abs(random.nextInt())%10); } } } head -n 功能:head用来显示档案的开头至标准输出当中,默认hea
1.P29 2.P45 3.递归循环 代码 import java.util.Scanner; public class text2 { public static void main(String[] args) { long sum = 0; Scanner scanner = new Scanner(System.in); System.out.println("Please input n:"); int n = scanner.nextInt(); if (n < 0)