Java第四次作业
1.
package Homework; import java.util.Scanner; public class ma { /** * @param args */ public static void main(String[] args) { // TODO Auto-generated method stub Scanner input=new Scanner(System.in); System.out.println("请输入年份"); int a=input.nextInt(); if(a%4==0 && a%100!=0 || a%400==0){ System.out.println("闰年"); }else{ System.out.println("平年"); } } }
2.
package Homework; import java.util.Random; import java.util.Scanner; public class ma1 { /** * @param args */ public static void main(String[] args) { // TODO Auto-generated method stub Scanner input=new Scanner(System.in); Random r=new Random(); System.out.println("请输入四位数"); int a=input.nextInt(); int b=r.nextInt(); if(a%1000/100==b){ System.out.println("幸运会员"); }else{ System.out.println("非幸运会员"); } } }
3.
package HomeWork; import java.util.Scanner; public class DDDD { /** * @param args */ public static void main(String[] args) { // TODO Auto-generated method stub Scanner input=new Scanner(System.in); System.out.println("请输入x值"); int x=input.nextInt(); int y; if (x>0){ y=x+3; System.out.println("y="+y); } if (x==0){ y=0; System.out.println("y="+y); } if (x<0){ y=x*2-1; System.out.println("y="+y); } }
4.
package HomeWork; import java.util.Scanner; public class DDDDD { /** * @param args */ public static void main(String[] args) { // TODO Auto-generated method stub Scanner input=new Scanner(System.in); System.out.println("请输入三个正数"); 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("能构成三角形"); } else System.out.println("不能构成三角形"); } }
5.
package Homework; import java.util.Scanner; public class ma3 { /** * @param args */ public static void main(String[] args) { // TODO Auto-generated method stub Scanner input = new Scanner(System.in); System.out.println("请输入一个月份"); int m = input.nextInt(); if(m==1||m==3||m==5||m==7||m==8||m==10||m==12){ System.out.println("31天"); } else if(m==2){ System.out.println("28天"); } else{ System.out.println("30天"); } } }
6.
package Homework; import java.util.Scanner; public class ma3 { /** * @param args */ public static void main(String[] args) { // TODO Auto-generated method stub Scanner input =new Scanner(System.in); System.out.println("输入学生的成绩"); int grade=input.nextInt(); int x=grade/10; switch(x){ case 10:System.out.println("A");break; case 9:System.out.println("A");break; case 8:System.out.println("B");break; case 7:System.out.println("C");break; case 6:System.out.println("D");break; default:System.out.println("E"); } } }
7.
package Homework; import java.util.Scanner; public class ma3 { /** * @param args */ public static void main(String[] args) { // TODO Auto-generated method stub Scanner input =new Scanner(System.in); System.out.println("输入一个数字"); int a=input.nextInt(); if(a%2==0&&a!=0){ System.out.println("这个数是偶数"); } else if(a%2!=0&&a!=0){ System.out.println("这个数是奇数"); } else{ System.out.println("这个数是0"); } } }
8.
package Homework; import java.util.Scanner; public class ma3 { /** * @param args */ public static void main(String[] args) { // TODO Auto-generated method stub Scanner input =new Scanner(System.in); System.out.println("输入a的值"); int a=input.nextInt(); if(a==1||a==5||a==10) System.out.println("a="+a); else System.out.println("a=none"); } }
9.
package Homework; import java.util.Scanner; public class ma3 { /** * @param args */ public static void main(String[] args) { // TODO Auto-generated method stub Scanner input =new Scanner(System.in); System.out.println("输入一个数"); int a=input.nextInt(); if(a%5==0&&a%6==0) System.out.println("这个数能被5和6整除"); else if(a%5==0&&a%6!=0) System.out.println("这个数能被5整除"); else if(a%5!=0&&a%6==0) System.out.println("这个数能被6整除"); else System.out.println("这个数不能被5和6整除"); } }