Question

Java

The whole idea is for me to gain a better understanding of the logic. If possible, can you go off of what I have started and not just give me a whole new written program?

Also, don't simplify result.

Implement a class named “Fraction” with the following properties:

1. numerator: int type, private

2. denominator: int type, private

and the following methods:

1. one default constructor which will create a fraction of 1/1.

2. one constructor that takes two parameters which will set the values of numerator and denominator to the specified parameters.

3. int getNum() : retrieves the value of numerator

4. int getDenom(): retrieves the value of the denominator

5. Fraction add(Fraction frac): adds with another Fraction number and returns the result in a new Fraction object.

6. Fraction sub(Fraction frac): is subtracted by another Fraction frac and returns the result in a new Fraction object.

7. Fraction mult(Fraction frac): multiplies with another Fraction number and returns the result in a new Fraction object.

8. Faction div(Fraction frac): is divided by another Fraction number and returns the result in a new Fraction object.

9. void print(): prints the Fraction number out

This is what I have so far, but I am getting hung up..

import java.util.Scanner;

public class Fraction {
private int numerator;
private int denominator;

//Default constructor that sets 1/1 fraction
Fraction(){
numerator=1;
denominator=1;
}

//Constructor that creates fraction with specified parameters
Fraction(int newNumerator, int newDenominator){
numerator = newNumerator;
denominator = newDenominator;
}

//Retreives value of numerator
public int getNum(){
return numerator;
}

//Retreives value of denominator
public int getDenom(){
return denominator;
}

//Adds fraction with another and returns value as Fraction object
public Fraction add(Fraction frac){
if(frac.denominator==denominator){
int num= frac.numerator+numerator;
int denom = denominator;
}else{
int denom = this.getDenom() * frac.getDenom();
int num = this.getNum()*frac.getDenom() + frac.getNum()*this.getDenom();
}
return new Fraction(num,denom);
}

//Subtracts fraction with another and returns value as Fraction object
public Fraction sub(Fraction frac){
int num = frac.numerator+numerator;
int denom= frac.denominator-denominator;
return new Fraction(num,denom);
  
}

//Multiplies fraction with another and returns value as Fraction object
public Fraction mult(Fraction frac){
int num = frac.getNum()*numerator;
int denom = frac.getDenom()*denominator;
return new Fraction(num,denom);
}

//Divides fraction with another and returns value as Fraction object
public Fraction div(Fraction frac){
int num = frac.getDenom()*numerator;
int denom = frac.getNum()*denominator;
return new Fraction(num,denom);
}

public void print(){
System.out.print(numerator + "/" + denominator);
}

Answer 1

import java.util.Scanner;

public class Fraction {
   private int numerator;
   private int denominator;

   //Default constructor that sets 1/1 fraction
   Fraction(){
      
       numerator=1;
       denominator=1;
   }

   //Constructor that creates fraction with specified parameters
   Fraction(int newNumerator, int newDenominator){
       // check that denominator is not 0, if it is 0 set it to 1
       if(newDenominator == 0)
           newDenominator = 1;
          
       numerator = newNumerator;
       denominator = newDenominator;
   }

   //Retreives value of numerator
   public int getNum(){
       return numerator;
   }

   //Retreives value of denominator
   public int getDenom(){
       return denominator;
   }

   //Adds fraction with another and returns value as Fraction object
   public Fraction add(Fraction frac){
      
       // no need to check equality of denominator, if denominator of both fractions is 1, then numerator = addition of both numerators
      
       int num = this.getNum()*frac.getDenom() + frac.getNum()*this.getDenom();
      
       int denom = this.getDenom() * frac.getDenom();
      
       return new Fraction(num,denom);
   }

   //Subtracts fraction with another and returns value as Fraction object
   public Fraction sub(Fraction frac){
      
       // numerator will be (product of numerator of first fraction and denominator of second fraction) - (product of denominator of first fraction and numerator of second fraction)
       int num = this.getNum()*frac.getDenom() - frac.getNum()*this.getDenom();
      
       int denom = this.getDenom() * frac.getDenom(); // denominator will be product of both denominators
      
      
       return new Fraction(num,denom);
  
   }

   //Multiplies fraction with another and returns value as Fraction object
   public Fraction mult(Fraction frac){
       int num = frac.getNum()*numerator;
       int denom = frac.getDenom()*denominator;
       return new Fraction(num,denom);
   }

   //Divides fraction with another and returns value as Fraction object
   public Fraction div(Fraction frac){
       int num = frac.getDenom()*numerator;
       int denom = frac.getNum()*denominator;
       return new Fraction(num,denom);
   }

   public void print(){
       System.out.print(numerator + "/" + denominator);
   }
}