package com.xuexiao;
import java.util.Scanner;
public class Text2 {
public static void main(String[] args) {
//1.输入一个年份,判断是不是闰年(可以被4整除但不能被100整除,或者能被400整除)
System.out.println("请输入一个年份:");
Scanner sc = new Scanner(System.in);
int a = sc.nextInt();
if ((a % 4 == 0 && a % 100 != 0) || (a % 400 == 0)) {
System.out.println(a+"年是闰年");
}else {
System.out.println(a+"年不是闰年");
}
}
}
package com.xuexiao;
import java.util.Scanner;
public class Text2 {
public static void main(String[] args) {
//2.输入一个4位会员卡号 如果百位数字是3的倍数 输出幸运会员,否则就不是.
System.out.print("请输入会员卡号:");
Scanner sc = new Scanner(System.in);
int a = sc.nextInt();
if (a >= 1000 && a <=9999) {
if(a / 100 % 10 % 3 == 0) {
System.out.println(a+"是幸运会员");
}else {System.out.println(a+"不是幸运会员");}
}else {System.out.println("您的输入有误");}
}
package com.xuexiao;
import java.util.Scanner;
public class Text2 {
public static void main(String[] args) {
//已知函数 x 输出y x>0 (x+3) x=0 y=0 x<0 x*2-1
Scanner sc = new Scanner(System.in);
System.out.print("请输入x的值:");
int x = sc.nextInt();
int y;
if(x > 0) {
y = x + 3;
System.out.println("y值为:"+y);
}if(x < 0) {
y = x*2 - 1;
System.out.println("y值为:"+y);
}if(x == 0){
y = 0;
System.out.println("y值为:"+y);
}
}
}
package com.xuexiao;
import java.util.Scanner;
public class Text2 {
public static void main(String[] args) {
//输入三个数 构成三角形;
Scanner sc = new Scanner(System.in);
System.out.print("请输入第一个数:");
int a = sc.nextInt();
System.out.print(" 请输入第二个数:");
int b = sc.nextInt();
System.out.print(" 请输入第三个数:");
int c = sc.nextInt();
if((a + b) >= c && (a + c) >= b && (b + c) >= a){
System.out.println("可构成三角形");
}else {
System.out.println("不可以构成三角形");}
}
}