Question

Can somebody help me with this assignment. I will highly appreciate. Also, please display the output as well. I need to use JAVA to to write the program.

HOME WORK: due 09.17.2019 (Rational Numbers) Create a class called Rational for performing arithmetic with fractions. Write a program to test your class. Use integer variables to represent the private instance variables of the class- the numerator and the denominator. Provide a constructor that enables an object of this class to be initialized when it's declared. The constructor should store the fraction in reduced form. The fraction option 2/4 is equivalent to % and would be stored in the object as 1 in the numerator and 2 in the denominator. Provide a no-argument constructor with default values in case no initializers are provided. Provide public methods that perform each of the following operations: a) Add two Rational numbers: The result of the addition should be stored in reduced form. b) Subtract two Rational numbers: The result of the subtraction should be stored in reduced form. c) Multiply two Rational numbers: The result of the multiplication should be stored in reduced form. d) Divide two Rational numbers: The result of the division should be stored in reduced form. e) Return a String representation of a Rational number in the form a/b. where a is the numerator and b is the denominator f) Return a String representation of a Rational number in a floating-point format. (Consider providing formatting capabilities that enable the user of the class to specify the number of digits of precision to the right of the decimal point.)

This is the sample output provided by my professor.

Answer 1

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Code:

import java.util.*;
class Solution{
public static void main (String[] args){
Scanner scan=new Scanner(System.in);
int num1,num2,den1,den2,prec;
System.out.print("Enter numerator 1: ");
num1=scan.nextInt();
System.out.print("Enter denominator 1: ");
den1=scan.nextInt();
System.out.print("Enter numerator 2: ");
num2=scan.nextInt();
System.out.print("Enter denominator 2: ");
den2=scan.nextInt();
System.out.print("Enter precision: ");
prec=scan.nextInt();
Rational r1=new Rational(num1,den1);
Rational r2=new Rational(num2,den2);
Rational r3;
int choice;
while(true){
System.out.println("1. Add\n2. Subtract\n3. Multiply");
System.out.print("4. Division\n5. Exit\nChoice: ");
choice=scan.nextInt();
switch(choice){
case 1: r3=r1.addition(r2);
System.out.print("a + b = "+r3.toString());
System.out.println(" = "+r3.toString(prec));
break;
case 2: r3=r1.subtract(r2);
System.out.print("a - b = "+r3.toString());
System.out.println(" = "+r3.toString(prec));
break;
case 3: r3=r1.multiply(r2);
System.out.print("a * b = "+r3.toString());
System.out.println(" = "+r3.toString(prec));
break;
case 4: r3=r1.divide(r2);
System.out.print("a / b = "+r3.toString());
System.out.println(" = "+r3.toString(prec));
break;
case 5: System.exit(0);
default: System.out.println("Invalid Choice! Choose 1-5");
}
}
}
}

class Rational{
private int numerator,denominator;
public Rational(){
this.numerator=0;
this.denominator=0;
}
public Rational(int a,int b){
this.numerator=a;
this.denominator=b;
}
public int getNumerator(){
return this.numerator;
}
public void setNumerator(int a){
this.numerator=a;
}
public int getDenominator(){
return this.denominator;
}
public void setDenominator(int b){
this.denominator=b;
}
public int gcd(int a,int b){
if(b==0) return a;
return gcd(b,a%b);
}
public Rational addition(Rational r){
Rational temp=new Rational();
int num=numerator*r.getDenominator()+denominator*r.getNumerator();
int den=denominator*r.getDenominator();
int hcf=gcd(num,den);
temp.setNumerator(num/hcf);
temp.setDenominator(den/hcf);
return temp;
}
public Rational subtract(Rational r){
Rational temp=new Rational();
int num=numerator*r.getDenominator()-denominator*r.getNumerator();
int den=denominator*r.getDenominator();
int hcf=gcd(num,den);
temp.setNumerator(num/hcf);
temp.setDenominator(den/hcf);
return temp;
}
public Rational multiply(Rational r){
Rational temp=new Rational();
int num=numerator*r.getNumerator();
int den=denominator*r.getDenominator();
int hcf=gcd(num,den);
temp.setNumerator(num/hcf);
temp.setDenominator(den/hcf);
return temp;
}
public Rational divide(Rational r){
Rational temp=new Rational();
int num=numerator*r.getDenominator();
int den=denominator*r.getNumerator();
int hcf=gcd(num,den);
temp.setNumerator(num/hcf);
temp.setDenominator(den/hcf);
return temp;
}
public String toString(){
return (""+numerator+"/"+denominator);
}
public String toString(int precision){
String format="%."+precision+"f";
return String.format (format, (1.0)*numerator/denominator);
}
}

Output:

Enter numerator 1: 1
Enter denominator 1: 3
Enter numerator 2: 7
Enter denominator 2: 8
Enter precision: 6
1. Add
2. Subtract
3. Multiply
4. Division
5. Exit
Choice: 1
a + b = 29/24 = 1.208333
1. Add
2. Subtract
3. Multiply
4. Division
5. Exit
Choice: 2
a - b = -13/24 = -0.541667
1. Add
2. Subtract
3. Multiply
4. Division
5. Exit
Choice: 3
a * b = 7/24 = 0.291667
1. Add
2. Subtract
3. Multiply
4. Division
5. Exit
Choice: 4
a / b = 8/21 = 0.380952
1. Add
2. Subtract
3. Multiply
4. Division
5. Exit
Choice: 5