第十周
1.
package test;
import java.util.Scanner;
public class test {
public static void main(String[] args) {
int x[]={7,4,8,1,9};
jc(x);
for (int i : x) {
System.out.print(i+"\t");
}
}
public static void jc(int[]x){
int a=0;
for (int i = x.length-1; i>0; i--) {
for (int j = 0; j < i; j++) {
if(x[j]>x[i]) {
a=x[j];
x[j]=x[i];
x[i]=a;
}
}
}
}
}
2.
package test;
import java.util.Scanner;
public class test {
public static void main(String[] args) {
returnbb();
}
public static void returnbb(){
System.out.println("输入一个数");
Scanner input=new Scanner(System.in);
jc();
}
public static void jc(){
Scanner input=new Scanner(System.in);
int a=input.nextInt();
int sum=1;
for(int i=1;i<=a;i++){
sum=sum*i;
}
System.out.println("阶乘为"+sum);
returnbb();
}
}
3.
package jb;
import java.util.Scanner;
public class jb {
public static void main(String[] args) {
returnbb();
}
public static void returnbb(){
System.out.println("输入年份");
Scanner input=new Scanner(System.in);
jc();
}
public static void jc(){
Scanner input=new Scanner(System.in);
int a=input.nextInt();
if(a%4==0||a%400==0&&a%100!=0){
System.out.println("闰年");}
else {
System.out.println("该年份是平年");
}
returnbb();
}
}
4.
package chap8;
import java.util.Random;
import java.util.Scanner;
public class Menu {
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();
}
}
}
