java第四次作业
1. package ikk; import java.util.Scanner; public class jjil { /** * @param args */ 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 year=input.nextInt(); if ((year%4==0&&year%100!=0)||(year%400==0)) { System.out.println("是闰年"); } else { System.out.println("不是闰年"); } } }
2. package ikk; import java.util.Random; import java.util.RandomAccess; import java.util.Scanner; public class asd { /** * @param args */ public static void main(String[] args) { // TODO Auto-generated method stub Scanner input=new Scanner(System.in); System.out.println("输入卡号"); int x=input.nextInt(); Random r=new Random(); int a=r.nextInt(10); if ((x/10%10)==a) { System.out.println("是会员"); } else { System.out.println("不是会员"); } } }
3. package ikk; import java.util.Scanner; public class S { /** * @param args */ public static void main(String[] args) { // TODO Auto-generated method stub Scanner input=new Scanner(System.in); int x=input.nextInt(); int y; if (x>0) { System.out.println(x+3); } else if(x==0) { System.out.println(x); } else if(x<0) { System.out.println(x*2-1); } } }
4. package ikk; import java.util.Scanner; public class AASD { /** * @param args */ public static void main(String[] args) { // TODO Auto-generated method stub Scanner input=new Scanner(System.in); System.out.println("输入第一边"); int a=input.nextInt(); System.out.println("输入第二边"); int b=input.nextInt(); System.out.println("输入第三边"); int c=input.nextInt(); if ((a+b>c)||(a-b<c)) { System.out.println("可以组成三角形"); } else { System.out.println("不可以组成三角形"); } } }
package apex; import java.util.Scanner; public class apex { 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 year=input.nextInt(); System.out.println("输入月份"); int month=input.nextInt(); int day; switch (month) { case 4: case 6: case 9: case 11: System.out.println("该月有30天"); break; case 2: if (year%4==0&&year%100!=0||year%400==0) { System.out.println("这月有29天"); break; } else { System.out.println("这月有28天"); break; } default: System.out.println("这月有31天"); break; } } }
package apex; import java.util.Scanner; public class apex { public static void main(String[] args) { // TODO Auto-generated method stub Scanner input=new Scanner(System.in); System.out.println("请输入您的成绩"); int a=input.nextInt(); switch (a/10) { case 10: case 9:System.out.println("成绩为A");break; case 8:System.out.println("成绩为B");break; case 7:System.out.println("成绩为C");break; case 6:System.out.println("成绩为D");break; default: System.out.println("成绩为E"); break; } } }
package apex; import java.util.Scanner; public class apex { public static void main(String[] args) { // TODO Auto-generated method stub Scanner input=new Scanner(System.in); System.out.println("请输入一个数"); int shu=input.nextInt(); if (shu%2==0) { System.out.println("这个数是偶数"); } else { System.out.println("这个数是奇数"); } } }
package apex; import java.util.Scanner; public class apex { public static void main(String[] args) { // TODO Auto-generated method stub Scanner input=new Scanner(System.in); System.out.println("请输入一个变量x"); int x=input.nextInt(); if (x==1) { System.out.println("x=1"); } else if(x==5) { System.out.println("x=5"); } else if(x==10) { System.out.println("x=10"); } else { System.out.println("x=none"); } } }