Question

Write In JAVA:

Part 1

The use of computers in education is referred to as computer-assisted instruction (CAI). Write a program that will help an elementary school student learn multiplication. Use a SecureRandom object to produce two positive one-digit integers (you will need to look up how to do this). The program should then prompt the user with a question, such as

How much is 6 times 7?

The student then inputs the answer. Next, the program checks the student’s answer. If it’s correct, display the message "Very good!" and ask another multiplication question. If the answer is wrong, display the message "No. Please try again.>again." and let the student try the same question repeatedly until the student finally gets it right. A separate method should be used to generate each new question. This method should be called once when the application begins execution and each time the user answers the question correctly.

Part 2

Modify the program from Part 1 so that various comments are displayed for each answer as follows:

Possible responses to a correct answer:

Very good!
Excellent!
Nice work!
Keep up the good work!

Possible responses to an incorrect answer:

No. Please try again.
Wrong. Try once more.
Don’t give up!
No. Keep trying.

Use random-number generation to choose a number from 1 to 4 that will be used to select one of the four appropriate responses to each correct or incorrect answer. Use a switch statement to issue the responses.

Part 3

Modify the program from Part 2 to use your question generation method to ask the student 10 different questions. Give students only one chance at answering each question. Count the number of correct and incorrect responses typed by the student. After the program has asked 10 questions, and the student types 10 answers, your program should calculate the percentage that are correct. If the percentage is lower than 75%, display "Please ask your teacher for extra help.", then reset the program so another student can try it. If the percentage is 75% or higher, display "Congratulations, you are ready to go to the next level!", then reset the program so another student can try it.

Part 4

Modify the program from Part 3 to allow the user to enter a difficulty level. At a difficulty level of 1, the program should use only single-digit numbers in the problems; at a difficulty level of 2, numbers as large as two digits, and so on. Allow for four levels of difficulty.

Part 5

Modify the program from Part 4 to allow the user to pick a type of arithmetic problem to study. An option of 1 means addition problems only, 2 means multiplication problems only, 3 means subtraction problems only, 4 means division problems only and 5 means a random mixture of all these types.

Answer 1

I think this helps you.

import java.util.*;
class question
{
   /*String correctans(int x)
   {
       if(x==1)
       {
           return "Excellent!";
       }
       else if(x==2)
       {
           return "Very good!";
       }
       else if(x==3)
       {
           return "Nice work!";
       }
       return "Keep up the good work!";
   }
   String wrongans(int x)
   {
       if(x==1)
       {
           return "No. Please try again.";
       }
       else if(x==2)
       {
           return "Wrong. Try once more.";
       }
       else if(x==3)
       {
           return "Don’t give up!";
       }
       return "No. Keep trying.";
   }*/
   public static int que(int oper,int diflevel)
   {
       Scanner sc=new Scanner(System.in);
       Random rand = new Random();
       int a = rand.nextInt(10000);
       int b = rand.nextInt(10000);
       int z=(int)Math.pow(10,diflevel);
       a=a%(z);
       b=b%(z);
       if(oper==1)
       {
           System.out.println("addition of "+a+" and "+b);
           int ans=a+b;
           int gans=sc.nextInt();
           if(ans==gans)
           {
               return 1;
           }
           return 0;
       }
       else if(oper==2)
       {
           System.out.println("multiplication of "+a+" and "+b);
           int ans=a*b;
           int gans=sc.nextInt();
           if(ans==gans)
           {
               return 1;
           }
           return 0;
       }
       else if(oper==3)
       {
           System.out.println("subtraction of "+a+" and "+b);
           int ans=a-b;
           int gans=sc.nextInt();
           if(ans==gans)
           {
               return 1;
           }
           return 0;
       }
       else if(oper==4)
       {
           System.out.println("division of "+a+" and "+b);
           int ans=a-b;
           int gans=sc.nextInt();
           if(ans==gans)
           {
               return 1;
           }
           return 0;
       }
       else
       {
           return que((rand.nextInt(10000))%4,diflevel);
       }
   }
   public static void main(String[] args)
   {
       int diflevel=0;
       int oper=0;
       boolean x=true;
       Scanner sc=new Scanner(System.in);
       Random rand = new Random();
       while(x)
       {
           diflevel=0;
           oper=0;
           x=true;
           System.out.println("Choose type of question");
           System.out.println("1-addition\n2-multiplication\n3-subtraction\n4-division\n5-random mixture of all");
           oper=sc.nextInt();
           System.out.println("enter a difficulty level 1-4");
           diflevel=sc.nextInt();
           int correct=0;
           for(int i=0;i<10;i++)
           {
               int q=que(oper,diflevel);
               correct=correct+q;
           }
           int per=(correct*100)/10;
           if(per<75)
           {
               System.out.println("Please ask your teacher for extra help");  
           }
           else
           {
               System.out.println("Congratulations, you are ready to go to the next level!");
           }
           System.out.println("want to continue enter 1 else 0");
           int k=sc.nextInt();
           if(k==0)
           {
               x=false;
           }
           else
           {
               x=true;
           }
       }
   }
}