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  • JAVA练习7

    /*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);

      }
    }

     

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  • 原文地址:https://www.cnblogs.com/qxc81518/p/7716534.html
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