Question

With this program you are going to design a math practice program for younger users. You will ask the user to enter two numbers. Only numbers may be entered. If the user enters a word, the program should disregard the entry and wait for an integer entry. There will not be another prompt if the user enters data other than whole numbers (integers).

Here is a sample run: Your static methods should accept two integers and return an integer. Do not worry about testing for division by 0 because that won't be one of the tests. Your methods will be named: addNumbers subtractNumbers multiplyNumbers divideNumbers The methods will be static. After each run, the program will ask if the user wishes to quit: Here is the prompt to quit the program: System.out.println("Enter 'Quit' to end the program."); Here are the prompts to read in the choices: System.out.println("Enter 1 to add the two numbers."); System.out.println("Enter 2 to subtract the second number from the first number."); System.out.println("Enter 3 to multiply the two numbers."); System.out.println("Enter 4 to divide the first number by the second number."); Here is the prompt to read in the two numbers: System.out.println("Enter two integers:"); Here is the welcome prompt: System.out.println("Welcome to *Mental Math Practice* where you can test your addition, subtraction, multiplication, and division."); Use a Scanner to read in the data from the console.

this is what the professor gave me

import java.util.Scanner;

/**
*
* @author dfreer
*/
public class MathTeacher {

  

/**
* @param args the command line arguments
*/
public static void main(String[] args) {
System.out.println("Welcome to *Mental Math Practice* where you can test your addition, subtraction, multiplication, and division.");   
  
System.out.println("Enter two integers:");

System.out.println("Enter 1 to add the two numbers.");
System.out.println("Enter 2 to subtract the second number from the first number.");
System.out.println("Enter 3 to multiply the two numbers.");
System.out.println("Enter 4 to divide the first number by the second number.");

System.out.println("Enter 'Quit' to end the program.");

}
  
}

Answer 1

Code:

import java.util.Scanner;
public class MathTeacher {
public static void main(String[] args) {
   Scanner input = new Scanner(System.in);
   int first=0,second=0,choice=0;
   String quit ="";
   System.out.println("Welcome to *Mental Math Practice* where you can test your addition, subtraction, multiplication, and division.");   
   do {
       System.out.println("Enter two integers:");
       first=input.nextInt();
       second=input.nextInt();
       System.out.println("Enter 1 to add the two numbers.");
       System.out.println("Enter 2 to subtract the second number from the first number.");
       System.out.println("Enter 3 to multiply the two numbers.");
       System.out.println("Enter 4 to divide the first number by the second number.");
       choice=input.nextInt();
       switch(choice) {
       case 1: System.out.println("Sum of Two number is: "+add(first,second));
       break;
      
       case 2: System.out.println("Subtraction of Two number is: "+subtract(first,second));
       break;
      
       case 3: System.out.println("Multiplication of Two number is: "+multiply(first,second));
       break;
      
       case 4: System.out.println("Division of Two number is: "+divide(first,second));
       break;
      
       default :System.out.println("Wrong Choice");
       break;
      
       }
       //input.nextInt();
       System.out.println("Enter 'Quit' to end the program.");
       input.nextLine();
       quit=input.nextLine();
      
   }
   while(!quit.equals("Quit"));
   }
public static int add(int first,int second) {
   return first+second;
}

public static int subtract(int first,int second) {
   return first - second;
}

public static int multiply(int first,int second) {
   return first * second;
}

public static int divide(int first,int second) {
   return first / second;
}
}

Output: