JAVA第三次作业

1.package com.itheima08;
import java.util.Scanner;
public class HelloBudget {
public static void main(String[] args ){
Scanner input=new Scanner(System.in);
System.out.println("请输入一个年份:");
int i=input.nextInt();
if(i%4==0&&i%100!=0||i%400==0){
    System.out.println(i+"年是闰年");
}else{
    System.out.println(i+"年不是闰年");
}
}
}package com.itheima08;
import java.util.Scanner;
public class HelloBudget {
public static void main(String[] args ){
Scanner input=new Scanner(System.in);
System.out.println("请输入会员编号:");
int i=input.nextInt();
if(i<1000){
    System.out.println(i+"不是会员编号");
}else if((i%1000/100)%3==0){
    System.out.println(i+"恭喜 您是幸运会员");
}else{
    System.out.println(i+"抱歉 您不是幸运会员");
}
}
}package com.itheima08;
import java.util.Scanner;
public class HelloBudget {
public static void main(String[] args ){
Scanner input=new Scanner(System.in);
System.out.println("请输入x的值:");
int i=input.nextInt();
if(i>0){
    System.out.println("y的值是"+(i+3));
}else if(i==0){
    System.out.println("y的值是"+(0));
}else if(i<0){
    System.out.println("y的值是"+(i*i-1));
}
}
}
4.package com.itheima08;
import java.util.Scanner;
public class HelloBudget {
public static void main(String[] args ){
Scanner input=new Scanner(System.in);
System.out.print("请输入第一个数:");
int a=input.nextInt();
System.out.println();
System.out.print("请输入第二个数:");
int b=input.nextInt();
System.out.println();    
System.out.print("请输入第三个数:");
int c=input.nextInt();
System.out.println();
if(a+b>c||a+c>b||b+c>a){
    System.out.println(a+""+b+""+c+""+"可以构成三角形");
}else{
    System.out.println(a+""+b+""+c+""+"不可以构成三角形");
}
}
}