Question

Define a class Fraction3YourName as follows,

/**
* Program Name: Fraction3YourName.java
* Discussion: Fraction3Yourname class
* written By:
* Date: 2019/09/19
*/
public class Fraction3YourName {
private int sign;
private int num;
private int denom;
public Fraction3YourName() {
//sign = ;
//denom = ;
}
public Fraction3YourName(int n) {
//sign = ;
//num = n;
//denom = ;
}
public Fraction3YourName(int s, int n, int d) {
//sign = s;
//num = n;
//denom = d;
}
}
You are asked to
 Complete the definitions for the given constructors; and
 Provide additional method members to allow the performance of four simple
arithmetic operations: (1) Addition, (2) Subtraction, (3) Multiplication, and (4)
Division; and
 Provide one method member print() to display the Fraction3YourName object.

/** REQUIRED PROGRAM OUTPUT

****************************************
* MENU – HW #3 *
* (1) Creating 2 Fraction3 Objects *
* (2) Performing Arithmetic Operations *
* (3) Displaying Fraction3 Objects *
* (4) Quit *
****************************************
Enter your option (1 through 4): 5
You are funny!

****************************************
* MENU – HW #3 *
* (1) Creating 2 Fraction3 Objects *
* (2) Performing Arithmetic Operations *
* (3) Displaying Fraction3 Objects *
* (4) Quit *
****************************************
Enter your option (1 through 4): 2
Creating 2 Fraction3 Objects –
// Your details

****************************************
* MENU – HW #3 *
* (1) Creating 2 Fraction3 Objects *
* (2) Performing Arithmetic Operations *
* (3) Displaying Fraction3 Objects *
* (4) Quit *
****************************************
Enter your option (1 through 4): 3
Displaying Fraction3 Objects –
// Your details

****************************************
* MENU – HW #3 *
* (1) Creating 2 Fraction3 Objects *
* (2) Performing Arithmetic Operations *
* (3) Displaying Fraction3 Objects *
* (4) Quit *
****************************************
Enter your option (1 through 4): 4
Performing Arithmetic Operations –
// Your details

****************************************
* MENU – HW #3 *
* (1) Creating 2 Fraction3 Objects *
* (2) Performing Arithmetic Operations *
* (3) Displaying Fraction3 Objects *
* (4) Quit *
****************************************
Enter your option (1 through 4): 4
Having fun!

by java programming

Answer 1

Please find the solution and rate the answer.

import java.util.Scanner;

public class Main {
    static Scanner sc = new Scanner(System.in);

    static Fractions getFraction() {

        System.out.println("enter sign as - or +");
        int sign = sc.next().charAt(0) == '-' ? -1 : 1;
        System.out.println("Enter numerator");
        int num = sc.nextInt();
        System.out.println("Enter denominator");
        int denom = sc.nextInt();
        return new Fractions(sign, num, denom);

    }

    public static void main(String[] args) {
        boolean loop = true;
        do {
            System.out.println("Enter fraction object 1");
            Fractions one = getFraction();
            System.out.println("Etner frac 2");
            Fractions two = getFraction();
            System.out.println("Multply(m),Divide(d),subtract(s),add(a),Exit(e)");
            char choice;

            choice = sc.next().charAt(0);
            if (choice == 'e') break;
            ;
            switch (choice) {
                case 'm':
                    one.multiply(two);
                    System.out.println(one);
                    break;
                case 'd':
                    one.divide(two);
                    System.out.println(one);
                    break;
                case 'a':
                    one.add(two);
                    System.out.println(one);
                    break;
                case 's':
                    one.subtract(two);
                    System.out.println(one);
                    break;
            }

        } while (loop);

//
//        System.out.println(fr);
    }
}

public class Fractions {
    private int sign;
    private int num;
    private int denom;

    public Fractions() {
        num = 1;
        denom = 1;
    }

    public Fractions(int n) {
        setSign(n);
        num = n;
    }

    public Fractions(int s, int n, int d) {
        setSign(s);
        num = n;
        denom = d;
    }

    @Override
    public String toString() {
        return ""+(num*sign)+"/"+denom+"";
    }

    public int getSign() {
        return sign;
    }

    public int getNum() {
        return num;
    }

    public void setNum(int num) {
        this.num = num;
    }

    public int getDenom() {
        return denom;
    }

    public void setDenom(int denom) {
        this.denom = denom;
    }

    private void setSign(int n) {
        if (n < 0) {
            sign = -1;
        } else {
            sign = +1;
        }
    }

    public void add(Fractions fr) {

        num = (this.num * fr.getDenom() * sign) + (fr.getNum() * denom * fr.getSign());
        if(num<0){
            sign=-1;
        }else{
            sign=1;
        }
        num=Math.abs(num);
        denom = Math.abs(fr.getDenom() * denom);
        normalize();
//        sign = fr.getSign() * sign;
    }
    public void subtract(Fractions fr){
        fr.setSign(-1*fr.getSign());
        add(fr);
        normalize();
    }
    public void multiply(Fractions fr) {
        sign = fr.getSign() * sign;
        num = Math.abs(fr.getNum() * num);
        denom = Math.abs(fr.getDenom()*denom);
        normalize();
    }

    private void normalize() {
        int gcd = gcd(num, denom);
        num = num/ gcd;
        denom = denom/gcd;
    }

    public void divide(Fractions fr) {
        sign = fr.getSign() * sign;
        num = Math.abs(num * fr.getDenom());
        denom = Math.abs(fr.getNum() * denom);
        normalize();
    }
    int gcd(int one, int two)
    {
        if (one == 0)
            return two;
        if (two == 0)
            return one;

        if (one == two)
            return one;

        if (one > two)
            return gcd(one-two, two);
        return gcd(one, two-one);
    }

}

Sample out: