第八次课后java作业
1:完善menu注册功能,抽奖,看小故事功能
package finish; import java.util.Random; import java.util.Scanner; public class ttt { public static void main(String[] args) { mainMenu(); } public static void mainMenu() { Scanner input = new Scanner(System.in); System.out.println("1.登录"); System.out.println("2.注册"); System.out.println("3.幸运抽奖"); System.out.println("4.看小故事,"); System.out.println("5.退出系统"); System.out.println("请选择"); int i = input.nextInt(); switch (i) { case 1: login(); break; case 2: zhuce(); break; case 3: choujiang(); break; case 4: gushi(); break; case 5: tuichu(); break; } } private static void tuichu() { System.out.println("谢谢使用"); } private static void gushi() { Scanner input = new Scanner(System.in); System.out.println("请选择想看的故事"); System.out.println("1.魔法山羊"); System.out.println("2.温暖的圣诞节"); System.out.println("3.长大的皮皮虾"); int y = input.nextInt(); switch (y) { case 1: System.out.println("从前有个老山羊,不怕艰难困苦,专心为森林里的动物们治病,感动了是天赐予他魔法,从此没有他治不好的病了"); break; case 2: System.out.println("从前有个孤独的田鼠,他很孤独,马上要过圣诞节了,他很想让别的动物陪他过圣诞节,最后森林里的动物全部都来了,给他了一个惊喜"); break; case 3: System.out.println("皮皮虾总是问妈妈,什么时候长大,妈妈说你换几次新衣服就长大了,换了一次又一次,直到皮皮虾身边出现一个小皮皮虾,他知道他长大了"); break; } } private static void choujiang() { Scanner input = new Scanner(System.in); System.out.println("请输入四位会员卡号"); int x = input.nextInt(); Random r = new Random(); int a = r.nextInt(10); if (x / 10 % 10 == a) { System.out.println("恭喜你中奖啦!"); } else { System.out.println("谢谢参与"); } returnMain(); } private static void zhuce() { Scanner input = new Scanner(System.in); System.out.println("请输入用户名"); String name = input.next(); System.out.println("请输入密码"); String mima = input.next(); System.out.println("注册成功"); returnMain(); } private static void login() { Scanner input = new Scanner(System.in); System.out.println("输入用户名"); String uname = input.next(); System.out.println("输入密码"); String upwd = input.next(); if (uname.equals("zs") && upwd.equals("123")) { System.out.println("登录成功"); } else { System.out.println("登录失败"); } returnMain(); } public static void returnMain() { System.out.println("是否返回主菜单?Y/N"); Scanner input = new Scanner(System.in); if (input.next().equalsIgnoreCase("Y")) { mainMenu();} else{System.out.println("谢谢使用"); } } }
2.编写一个方法,求整数n的阶乘,例如5的阶乘是1*2*3*4*5。
package finish; public class hhh extends ttt { public static void main(String[] args) { System.out.println(jc(5)); } private static int jc(int a) { int p=1; for(int i=1;i<=a;i++){ p*=i; } return p; } }
3.编写一个方法,判断该年份是平年还是闰年。
package finish; public class hhh extends ttt { public static void main(String[] args) { year(2014); } private static void year(int a) { if (a % 4 == 0 || a % 100 != 0 && a % 400 == 0) { System.out.println("闰年"); } else { System.out.println("不是闰年"); } } }