1.package learn;import java.util.Scanner;public class day03 {
public static void main(String[] args) {
// TODO Auto-generated method stub
Scanner input = new Scanner(System.in);
System.out.println("请输入一个年份");
int year = input.nextInt();
if (year % 4 == 0 || year % 400 == 0 && year % 100 != 0 ) {
System.out.println("此年份是闰年");
}else {
System.out.println("此年份不是闰年");
}
}
}
2.package learn;import java.util.Scanner;public class day03 {
public static void main(String[] args) {
// TODO Auto-generated method stub
Scanner input = new Scanner(System.in);
System.out.println("请输入一个四位数的会员卡号");
int number = input.nextInt();
int bai = number % 1000 / 100 ;
if (bai % 3 == 0) {
System.out.println("您是幸运会员");
}else {
System.out.println("您不是幸运会员");
}
}
}
3.package learn;import java.util.Scanner;public class day03 {
public static void main(String[] args) {
// TODO Auto-generated method stub
Scanner input = new Scanner(System.in);
System.out.println("请输入一个X的值");
int X = input.nextInt();
if (X>0) {
System.out.println("y=" + (X+3));
}else if (X==0) {
System.out.println("y=" + 0);
}else if (X<0) {
System.out.println("y=" + (2*X-1));
}else {
System.out.println("无结果");
}
}
}
4.package learn;import java.util.Scanner;public class day03 {
public static void main(String[] args) {
// TODO Auto-generated method stub
Scanner input = new Scanner(System.in);
System.out.println("请输入第一个数");
int a = input.nextInt();
System.out.println("请输入第二个数");
int b = input.nextInt();
System.out.println("请输入第三个数");
int c = input.nextInt();
if (a+b>c && b+c>a && a+c>b) {
System.out.println("这三位数可构成三角形");
}else {
System.out.println("这三个数不可构成三角形");
}
}
}
