/*3-1
* 功能:产生随机数来执行减法,并从用户中获得数字用以判断正误。
*/
import java.util.Scanner;
public class AdditionQuiz {
public static void main(String[] args)
{
int number1=(int)(System.currentTimeMillis()%10);
int number2=(int)(System.currentTimeMillis()/7%10);
Scanner input=new Scanner(System.in);
System.out.print(number1+"+"+number2+"=?");
int answer=input.nextInt();
System.out.println(number1+"+"+number2+"="+answer+"你的答案是:"+(number1+number2==answer));
}
}
/*3-2
* 功能:输入一个整数,如果是5的倍数,就打印HiFive,如果是2的倍数,就打印HiEven。
*/
import java.util.Scanner;
public class SimpleIfDemo
{
public static void main(String[] args)
{
Scanner input =new Scanner(System.in);
System.out.println("输入一个整数:");
int number =input.nextInt();
if(number%5==0)
System.out.println("HiFive");
else if(number%2==0)
System.out.println("HiEven");
}
}
/*3-3
*功能:就是实现一个减法,然后判断正确还是错误。
*/
import java.util.Scanner;
public class SubtractionQuiz {
public static void main(String[] args)
{
int number1=(int)(Math.random()*10);
int number2=(int)(Math.random()*10);
if (number1<number2)
{
int temp=number1;
number1=number2;
number2=temp;
}
System.out.print(number1+"-"+number2+"=?");
Scanner input =new Scanner(System.in);
int answer=input.nextInt();
if ((number1-number2)==answer)
System.out.println("你的答案是正确的!加油加油哦!"3);
else
System.out.println("你的答案是错误的,下次努力哈。");
}
}
import java.util.Scanner;
public class ComputeTax {
public static void main(String[] args)
{
Scanner input =new Scanner(System.in);
System.out.println("一大堆东西。");
int status=input.nextInt();
System.out.println("请输入你的收入(如实汇报):");
double income=input.nextDouble();
double tax=0;
if (status==0)
{
if(income<=8350)
tax=income*0.10;
else if(income<=33950)
tax=8350*0.1+(income-8350)*0.15;
else if(income<=82250)
tax=8350*0.1+(33950-8350)*0.15+(income-33950)*0.25;
else if(income<=171550)
tax=8350*0.1+(33950-8350)*0.15+(82250-33950)*0.25+(income-82250)*0.28;
else if(income<=372590)
tax=8350*0.1+(33950-8350)*0.15+(82250-33950)*0.25+(171550-82250)*0.28+(income-171550)*0.33;
else
tax=8350*0.1+(33950-8350)*0.15+(82250-33950)*0.25+(171550-82250)*0.28+(372590-171550)*0.33+(income-372590)*0.35;
}
else if(status==1)
{}
else if(status==2)
{}
else if(status==3)
{}
else
{
System.out.println("错误:你钱这么多?不存在的");
System.exit(1);
}
System.out.println("Tax is"+(int)(tax*100)/100.0);
}
}
import java.util.Scanner;
public class TestBooleanOperators {
public static void main(String[] args)
{
Scanner input =new Scanner(System.in);
System.out.println("请输入一个整数:");
int number =input.nextInt();
if(number%2==0&&number%3==0)
System.out.println("数字可以被2、3整除。");
if(number%2==0||number%3==0)
System.out.println("数字可以被2或3整除。");
if(number%2==0^number%3==0)
System.out.println("数字不可以被2、3整除。");
}
}
import java.util.Scanner;
public class LeapYear {
public static void main(String[] args)
{
Scanner input =new Scanner(System.in);
System.out.print("请输入年份:");
int year=input.nextInt();
boolean isLeapYear=(year%4==0&&year%100!=0)||(year%400==0);
System.out.println(year+"是闰年"+isLeapYear);
}
}