10次作業

1

 

package work;

public class test {
public static void main(String[] args) {
int[] a = { 22, 4,5, 6, 9, 1 };
test.mp(a);

}

public static void mp(int a[]) {
for (int i = 1; i < a.length; i++) {
for (int j = 0; j < a.length - i; j++) {
if (a[j] > a[j + 1]) {
int temp = a[j];
a[j] = a[j + 1];
a[j + 1] = temp;
}
}
}
for (int b : a) {
System.out.print(b + " ");
}
}
}

 

 

 

 

 2

package zhh;

import java.util.Scanner;

public class zhh{
public static void main(String[] args) {
jc();
}
public static void jc() {
Scanner input = new Scanner(System.in);
System.out.println("请输入整数：");
int a = input.nextInt();
int jie=1;
for (int i = 1; i<=a; i++) {
jie*=i;

}
System.out.println(jie);
}
}

 

 

 

3

 

package zhh;

import java.util.Scanner;

public class zhh {
public static int year() {
System.out.println("输入年份");
Scanner input = new Scanner(System.in);
int x = input.nextInt();
if (x % 4 == 0 && x % 100!=0 || x % 400 == 0) {
System.out.println("该年为闰年");
}else {
System.out.println("该年为平年");
}
return x;
}
public static void main(String[] args) {
year();
}
}

 

 

4

package zhh;

import java.util.Random;
import java.util.Scanner;

public class zhh {
public static void mainMenu(){
Scanner input=new Scanner(System.in);
System.out.println("欢迎使用本系统");
System.out.println("1.登录");
System.out.println("2.注册");
System.out.println("3.幸运抽奖");
System.out.println("4.退出");
System.out.println("请选择");
int i=input.nextInt();
switch(i){
case 1:
login();
break;
case 2:
reg();
break;
case 3:
lucky();

}


}

private static void lucky() {
System.out.println("输入四位卡号");
Scanner input =new Scanner(System.in);
int kh=input.nextInt();
Random r=new Random();
int a = r.nextInt(10);
if(kh / 100 % 10==a) {
System.out.println("该用户是幸运会员");
}else {
System.out.println("该用户不是幸运会员");
}
}

public static void returnMain(){
Scanner input=new Scanner(System.in);
System.out.println("是否返回主菜单？");
if(input.next().equalsIgnoreCase("YES"))
mainMenu();
else
System.out.println("谢谢使用");
}

public static void reg() {
// TODO Auto-generated method stub
Scanner input=new Scanner(System.in);
System.out.println("输入要注册的用户名");
String uname=input.next();
System.out.println("输入注册密码");
String upwd=input.next();
System.out.println("注册成功");
returnMain();


}

public 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("ok");
}else{
System.out.println();
}
returnMain();
}

public static void main(String[] args) {
mainMenu();

}
}