第三次作业
1.
package wlx;
import java.util.Scanner;
public class wx {
public static void main(String[] args) {
// TODO Auto-generated method stub
Scanner input=new Scanner(System.in);
System.out.println("输入年份：");
int a=input.nextInt();
if(a%4==0||a%400==0&&a%100!=0){
System.out.println("是闰年");
}else{
System.out.println("不是闰年");
}
}
}
2.
package wlx;
import java.util.Scanner;
public class wx {
public static void main(String[] args) {
// TODO Auto-generated method stub
Scanner input=new Scanner(System.in);
System.out.println("输入一个4位会员卡号：");
int a=input.nextInt();
if(a%1000/100%3==0){
System.out.println("是幸运会员");
}else{
System.out.println("不是幸运会员");
}
}
}
3.
package wlx;
import java.util.Scanner;
public class wx {
public static void main(String[] args) {
// TODO Auto-generated method stub
Scanner input=new Scanner(System.in);
System.out.println("输入一个x：");
int y=0;
int x=input.nextInt();
if(x>0){
y=x+3;
}else if(x==0){
y=0;
}else if(x<0){
y=x*2-1;
}
System.out.println("y="+y);
}
}
4.
package wlx;
import java.util.Scanner;
public class wx {
public static void main(String[] args) {
// TODO Auto-generated method stub
Scanner input=new Scanner(System.in);
System.out.println("输入三角形三边长");
int a=input.nextInt();
int b=input.nextInt();
int c=input.nextInt();
if(a+b>c&&a+c>b&&b+c>a){
System.out.println("能组成三角形");
}else{
System.out.println("不能组成三角形");
}
}
}
