Question

Java Code:

Console IO Practice Exercise

The purpose of this exercise is to practice console input and output with the Java console.

Setup:

Create a class called ConsolePractice with a main method.

Create a static field in your class that stores a scanner object. You will use this scanner for all user input.

private static Scanner scanner = new Scanner(System.in);

Part A:

Create a static method called “divide”. Your method should do the following:

Accept two integers as parameters, a numerator and denominator

Compute the quotient and remainder of dividing the numerator by the denominator.

Print the quotient and remainder to the Java console.

Inside your main method, request two integers from the Java console and call your “divide” method.

Part B:  

Create a static method called “compare”. Your method should do the following:

Accept two arguments of type int. Use the following method header:

public static int compare(int first, int second)

Your method should return the following values:

Return 0, when “first” and “second” are equal

Return -1, when “first” is less than “second”

Return 1, when “first” is greater than “second”

Inside your main method, request two integers from the Java console and pass them to your “compare” method. Store the result of your method call and print it to the Java console

Part C:

Create a static method called “max”. Your method should do the following:

Accept three arguments of type int.

Your method should print the largest of the three integers to the Java console.

Inside your main method, read in three integers from the Java console and pass them to your “max” method

Challenge:

Create a static method called “sum”. Your method should do the following:

Accept no arguments

Request an integer n from the Java console.

Use the value n to request n double values from the user (use a loop).

Sum each of the double values received and return the result.

Inside your main method, call your “sum” method and print the results to the Java console.

Answer 1

import java.util.Scanner;

//Class Console Practice definition
public class ConsolePractice
{
   //Scanner class object created
   private static Scanner scanner = new Scanner(System.in);
  
   //Main method definition
   public static void main(String [] ss)
   {
       //Declaration of variables for user input
       int first, second, third, result;
       double res;
      
       System.out.println("Enter two numbers to show quotient and reminder: ");
       //Accept two integer value from console
       first = scanner.nextInt();
       second = scanner.nextInt();
       //Calls method divide to display quotient and remainder
       divide(first, second);
      
       System.out.println("Enter two numbers to Compare: ");
       //Accept two integer value from console
       first = scanner.nextInt();
       second = scanner.nextInt();
       //Calls method compare to display comparison result
       result = compare(first, second);
       System.out.println("Comparison result = " + result);
      
       System.out.println("Enter three numbers to find biggest: ");
       //Accept three integer value from console
       first = scanner.nextInt();
       second = scanner.nextInt();
       third = scanner.nextInt();
       //Calls method max to display largest number out of 3 numbers
       max(first, second, third);
       //Call the method sum to display the total of n double numbers
       res = sum();
       System.out.println("Total of double numbers = " + res);
   }//End of method main

   //Method divide to display quotient and remainder
   public static void divide(int numerator, int denominator)
   {
       System.out.println("Quotient: " + numerator / denominator);
       System.out.println("Remainder: " + numerator % denominator);
   }//End of method divide
  
   //Method compare to return the comparison result of two numbers
   public static int compare(int first, int second)
   {
       //Checks and returns 0 if both the numbers are equal
       if(first == second)
           return 0;
       //Checks and returns -1 if first number is less than the second number
       else if(first < second)
           return -1;
       //Returns 1 if first number is greater than the second number
       else
           return 1;
   }//End of method compare
  
   //Method max to display the largest number out of 3 numbers
   public static void max(int first, int second, int third)
   {
       //Checks if first number is greater than the second and third then first is the largest.
       if(first > second && first > third)
           System.out.println("Largest Number = " + first);
       //Checks if second number is greater than the third then second is the largest.
       else if(second > third)
           System.out.println("Largest Number = " + second);
       //Otherwise third is the largest
       else
           System.out.println("Largest Number = " + third);
   }//End of method max
  
   //Method sum returns the total of n double numbers
   public static double sum()
   {
       //variable n for how many numbers
       int n;
       //variable total is initially zero
       double total = 0;
      
       System.out.println("Enter how many numbers you want to add?");
       //Accepts how many numbers user want
       n = scanner.nextInt();
      
       System.out.println("Enter " + n + " Numbers: ");
       //Accepts n double numbers and calculates total
       for(int c = 0; c < n; c++)
       {
           total += scanner.nextDouble();
       }
       //Returns the total of n double numbers
       return total;
   }//End of method sum
  
}//End of class

Output:

Enter two numbers to show quotient and reminder:
20
3
Quotient: 6
Remainder: 2
Enter two numbers to Compare:
22
3
Comparison result = 1
Enter three numbers to find biggest:
12
56
5
Largest Number = 56
Enter how many numbers you want to add?
3
Enter 3 Numbers:
10.21
33.21
2.4
Total of double numbers = 45.82