第4次作业
上机作业
1. package ljk;
import java.util.Scanner;
public class ljlj {
private void scanner() {
// TODO Auto-generated method stub
}
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
Scanner input=new Scanner(System.in);
int a=input.nextInt();
if ((a%4==0&&a%100!=0)||(a%400==0)){
System.out.println("是闰年");}
else{
System.out.println("不是闰年");}
}
}
2. package ljk;
import java.util.Random;
import java.util.RandomAccess;
import java.util.Scanner;
public class ljlj {
private void scanner() {
// TODO Auto-generated method stub
}
/**
* @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 y=input.nextInt();
Random r=new Random();
int a=r.nextInt(10);
if ((y/10%10)==a){
System.out.println("是会员");}
else{
System.out.println("不是会员");}
}
}
3. package ljk;
import java.util.Scanner;
public class ljlj {
private void scanner() {
// TODO Auto-generated method stub
}
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
Scanner input=new Scanner(System.in);
int x=input.nextInt();
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 ljk;
import java.util.Scanner;
public class ljlj {
private void scanner() {
// TODO Auto-generated method stub
}
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
Scanner input=new Scanner(System.in);
int a=input.nextInt();
int b=input.nextInt();
int c=input.nextInt();
if ((a+b>c)&&(a-b<c)||(a+c>b)&&(a-c<b)||(b+c>a)&&(b-c<a)){
System.out.println("可以组成三角形");
}else {
System.out.println("不能组成三角形");}
}
}
课后作业
1.
package Class1;
import java.util.Scanner;
public class Class5 {
/**
* @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 year=input.nextInt();
System.out.println("请输入月份");
int month=input.nextInt();
if (year%4==0&&year%100!=0||year%400==0) {
if(month==1||month==3||month==5||month==7||month==8||month==10||month==12){
month=31;
}else if(month==4||month==6|month==9||month==11){
month=30;
}else if(month==2){
month=29;
}
}else{
if(month==1||month==3||month==5||month==7||month==8||month==10||month==12){
month=31;
}else if(month==4||month==6|month==9||month==11){
month=30;
}else if(month==2){
month=28;
}
System.out.println("该年份的月份为"+month);
}
}
}
2.
package Class1;
import java.util.Scanner;
public class Class6 {
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
Scanner input=new Scanner(System.in);
System.out.println("请输入成绩");
int a=input.nextInt();
switch (a/10) {
case 6:
System.out.println("您的成绩等级为D");
break;
case 7:
System.out.println("您的成绩等级为C");
break;
case 8:
System.out.println("您的成绩等级为B");
break;
case 9:
case 10:
System.out.println("您的成绩等级为A");
break;
default:
System.out.println("您的成绩等级为E");
break;}
}
}
3.
package Class1;
import java.util.Scanner;
public class Class7 {
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
Scanner input=new Scanner(System.in);
System.out.println("请输入一个数字");
int a=input.nextInt();
if(a%2==0){
System.out.println("该数为偶数");
}else{
System.out.println("该数为奇数");
}
}
}
4.
package Class1;
import java.util.Scanner;
public class Class8 {
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
Scanner input=new Scanner(System.in);
System.out.println("请输入一个数值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");
}
}
}
5.
package Class1;
import java.util.Scanner;
public class Class9 {
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
Scanner input=new Scanner(System.in);
System.out.println("请输入一个数值X");
int x=input.nextInt();
if(x%5==0&&x%6==0){
System.out.println("能被5和6整除");
}else if(x%5==0){
System.out.println("只能被5整除");
}else if(x%6==0){
System.out.println("只能被6整除");
}else if(x%5!=0||x%6==0){
System.out.println("不能被5或6整除");
}
}
}