Question

Please write in JAVA

PLEASE LOOK AT THE HIGHLIGHTED PART

Write a program that displays a menu as shown in the sample run. You can enter 1, 2, 3, or 4 for choosing an addition, subtraction, multiplication, or division test. After a test is finished, the menu is re-displayed. You may choose another test or enter 5 to exit the system. Each test generates two random single-digit numbers to form a question for addition, subtraction, multiplication, or division. For a subtraction such as number1 – number2, number1 is greater than or equal to number2. For a division question such as number1 / number2, number2 is not zero. I have enclose the program below, what is required to do is to include exception handler that deals with nonnumeric operands, ArithemeticException and any others you think is required by this program.

Main menu

1: Addition

2: Subtraction

3: Multiplication

4: Division

5: Exit

Enter a choice: 1

What is 1 + 7? 8

Correct

Main menu

1: Addition

2: Subtraction

3: Multiplication

4: Division

5: Exit

Enter a choice: 1

What is 4 + 0? 5

Your answer is wrong. The correct answer is 4

Main menu

1: Addition

2: Subtraction

3: Multiplication

4: Division

5: Exit

Enter a choice: 4

What is 4 / 5? 1

Your answer is wrong. The correct answer is 0.8

Main menu

1: Addition

2: Subtraction

3: Multiplication

4: Division

5: Exit

Enter a choice:

import java.util.Scanner;

import java.text.DecimalFormat;

public class MathTutor {

public static void main(String[] args) {

Scanner input = new Scanner(System.in);

System.out.println("Main menu");

System.out.println("1: Addition");

System.out.println("2: Subtraction");

System.out.println("3: Multiplication");

System.out.println("4: Division");

System.out.println("5: Exit");

int userChoice = 0;

System.out.println("Enter a choice:");

userChoice = input.nextInt();

while (userChoice != 5) {

int firstNum = (int)(Math.random() * 10);

int secondNum = (int)(Math.random() * 10);

switch (userChoice) {

case 1:

int adding = firstNum + secondNum;

System.out.println(firstNum +" + "+secondNum+"?");

int addingInput = input.nextInt();

if (addingInput == adding)

System.out.println("correct");

else

System.out.println("Your answer is wrong. The correct answer is "+ adding);

break;

case 2:

int sub = firstNum - secondNum;

System.out.println(firstNum +" - "+secondNum+"?");

int subInput = input.nextInt();

if (subInput == sub)

System.out.println("correct");

else

System.out.println("Your answer is wrong. The correct answer is "+ sub);

break;

case 3:

int mult = firstNum * secondNum;

System.out.println(firstNum +" * "+secondNum+"?");

int multInput = input.nextInt();

if (multInput == mult)

System.out.println("correct");

else

System.out.println("Your answer is wrong. The correct answer is "+ mult);

break;

case 4:

while (secondNum == 0){

// to make sure the bottom number is never zero

secondNum = (int)Math.round((Math.random()*10));

};

double div = firstNum / secondNum;

System.out.println(firstNum +" / "+secondNum+"?");

double divInput = input.nextDouble();

if (divInput == div)

System.out.println("correct");

else

System.out.println("Your answer is wrong. The correct answer is "+ div);

break;

case 5:

System.exit(0); break;

default:

System.out.println("Error: Out of range");

System.exit(0);

}

System.out.println("Enter a choice:");

userChoice = input.nextInt();

}

System.out.println("!");

}

}

Answer 1

import java.util.Scanner;

import java.text.DecimalFormat;

public class MathTutor {

public static void main(String[] args) {

Scanner input = new Scanner(System.in);

System.out.println("Main menu");

System.out.println("1: Addition");

System.out.println("2: Subtraction");

System.out.println("3: Multiplication");

System.out.println("4: Division");

System.out.println("5: Exit");

int userChoice = 0;

System.out.println("Enter a choice:");
try
{

userChoice = input.nextInt();
}
catch (NumberFormatException e) {
System.out.println(e);

}

while (userChoice != 5) {

int firstNum = (int)(Math.random() * 10);

int secondNum = (int)(Math.random() * 10);

switch (userChoice) {

case 1:

int adding = firstNum + secondNum;

System.out.println(firstNum +" + "+secondNum+"?");

int addingInput = input.nextInt();

if (addingInput == adding)

System.out.println("correct");

else

System.out.println("Your answer is wrong. The correct answer is "+ adding);

break;

case 2:

int sub = firstNum - secondNum;

System.out.println(firstNum +" - "+secondNum+"?");

int subInput = input.nextInt();

if (subInput == sub)

System.out.println("correct");

else

System.out.println("Your answer is wrong. The correct answer is "+ sub);

break;

case 3:

int mult = firstNum * secondNum;

System.out.println(firstNum +" * "+secondNum+"?");

int multInput = input.nextInt();

if (multInput == mult)

System.out.println("correct");

else

System.out.println("Your answer is wrong. The correct answer is "+ mult);

break;

case 4:

while (secondNum == 0){

// to make sure the bottom number is never zero

secondNum = (int)Math.round((Math.random()*10));

};
try
{

double div = firstNum / secondNum;

System.out.println(firstNum +" / "+secondNum+"?");

double divInput = input.nextDouble();

if (divInput == div)

System.out.println("correct");

else

System.out.println("Your answer is wrong. The correct answer is "+ div);
}catch(ArithmeticException e){System.out.println(e);}

break;

case 5:

System.exit(0); break;

default:

System.out.println("Error: Out of range");

System.exit(0);

}

System.out.println("Enter a choice:");

userChoice = input.nextInt();

}

System.out.println("!");

}

}

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