第4周Java作业
课堂练习
1
package zy3;
import java.util.Scanner;
public class zy3 {
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
System.out.println("输入一个年份");
Scanner input=new Scanner(System.in);
int x=input.nextInt();
if(x%4==0&&x%100!=0){
System.out.println("是润年");
}
else{
System.out.println("不是闰年");
}
}
}
2
package zy3;
import java.util.Scanner;
import java.util.Random;
public class zy3 {
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
Scanner input=new Scanner(System.in);
System.out.println("输入会员卡号");
int x=input.nextInt();
int c=x/10%10;
Random d=new Random();
int f=d.nextInt(10);
if(c==f){
System.out.println("您是幸运会员");
}
else{
System.out.println("您不是幸运会员");
}
}
}
3
package zy3;
import java.util.Scanner;
public class zy3 {
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
System.out.println("输入一个函数");
Scanner input=new Scanner(System.in);
int x=input.nextInt();
int y;
if(x>0){
y=x+3;
System.out.println(y);
}
if(x==0){
y=0;
System.out.println(y);
}
if(x<0){
y=x*2-1;
System.out.println(y);
}
}
}
4
package zy3;
import java.util.Scanner;
public class zy3 {
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
System.out.println("输入三个数");
Scanner input=new Scanner(System.in);
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("不能够成三角形");
}
}
}
作业
1
package zy3;
import java.util.Scanner;
public class zy3 {
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
System.out.println("输入年份，月份");
Scanner input=new Scanner(System.in);
int year=input.nextInt();
int month=input.nextInt();
int day = 0;
switch(month){
case 1:
case 3:
case 5:
case 7:
case 8:
case 10:
case 12:
day=31;
System.out.println("该月是"+month
+"月，"+"该月有"+day+"天。");
break;
case 2:if(year%4==0&&year%100!=0||year%400==0){
day=29;
}
else{
day=28;
}
System.out.println("该月是"+month
+"月，"+"该月有"+day+"天。");
break;
case 4:
case 6:
case 9:
case 11:
day=30;
System.out.println("该月是"+month
+"月，"+"该月有"+day+"天。");
}
}
}
2
package zy3;
import java.util.Scanner;
public class zy3 {
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
Scanner input=new Scanner(System.in);
int a=input.nextInt();
a=a/10;
switch(a){
case 10:
case 9:
System.out.println("成绩为A");
break;
case 8:
System.out.println("成绩是B");
break;
case 7:
System.out.println("成绩是C");
break;
case 6:
System.out.println("成绩是D");
break;
case 5:
case 4:
case 3:
case 2:
case 1:
case 0:
System.out.println("不及格");
}
}
}
3
package zy3;
import java.util.Scanner;
public class zy3 {
/**
* @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%2==0){
System.out.println("是偶数");
}
else{
System.out.println("是奇数");
}
}
}
4
import java.util.Scanner;
public class zy3 {
/**
* @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 x=input.nextInt();
switch (x*1) {
case 1:
System.out.println("x=1");
break;
case 5:
System.out.println("x=5");
break;
case 10:
System.out.println("x=10");
break;
default:
System.out.println("x=none");
break;
}
}
}
5
package zy3;
import java.util.Scanner;
public class zy3 {
/**
* @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");
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 && x % 6 != 0) {
System.out.println("能被5整除");
} else if (x % 5 != 0 && x % 6 == 0) {
System.out.println("能被6整除");
} else if (x % 5 != 0 && x % 6 != 0) {
System.out.println("不能被5和6整除");
}
}
}
