Question

Create a new class named Fraction that models fractions, such as 2/3 or 45/9. Implement the following API: Constructor: Fraction(int numerator, int denominator) . String toString() so instances of the class can be printed. The format used above is sufficient. Fraction simplify() This method returns a new Fraction that is arithmetically equal to that given, but for which the numerator and denominator have no common factors. Create a testing program, TestFraction, that prompts the user to provide the numerator and denominator of a fraction, creates the corresponding Fraction object, then prints both it and a simplified version. If the denominator is 1, it should be omitted when printed. (This test should take place in your toString method.) Provide a transcript of five executions of TestFraction, using different values for numerator and denominator that demonstrate that your program runs correctly.

Answer 1

Screenshot

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Program

import java.util.Scanner;

//Create a class fraction
class FractionClass{
   //Instance variables
   private int numerator;
   private int denominator;
   //Constructor
   public FractionClass(int num,int denom){
       numerator=num;
       if(denom==0) {
           System.out.println("Denominator cannot be zero");
           denominator=1;
       }
       else {
           denominator=denom;
       }
   }
   public int calculateGCD(int numerator, int denominator) {
       if (numerator % denominator == 0) {
                 return denominator;
            }
       return calculateGCD(denominator, numerator % denominator);
       }
   //To simplify the fraction
   public FractionClass simplify() {
       FractionClass fraction=new FractionClass(numerator, denominator);
       int gcd = calculateGCD(numerator, denominator);
       fraction.setNumerator(numerator / gcd);
       fraction.setDenominator(denominator /gcd);
       return fraction;
   }
   //Getters and setters
   public int getNumerator() {
       return numerator;
   }
   public void setNumerator(int numerator) {
       this.numerator = numerator;
   }
   public int getDenominator() {
       return denominator;
   }
   public void setDenominator(int denom) {
       if(denom==0) {
           System.out.println("Denominator cannot be zero");
           denominator=1;
       }
       else {
           this.denominator=denom;
       }
   }
   //Override toString method
   public String toString() {
       String str="";
       str+="Fraction = ";
       str+=numerator;
       if(denominator!=1) {
           str+="/"+denominator+"\n";
       }
      
       FractionClass f=simplify();
       str+="Simplified Fraction = ";
       str+=f.numerator;
       if(f.denominator!=1) {
           str+="/"+f.denominator+"\n";
       }
       return str;
   }
  
}
//Test class
public class FractionTest {

   public static void main(String[] args) {
       //Call test
       testFraction();

   }
   //Test method
   public static void testFraction() {
       //For input read
       Scanner sc=new Scanner(System.in);
       //Loop for 5 tests
       for(int i=0;i<5;i++) {
           System.out.print("Enter numerator: ");
           int num=sc.nextInt();
           System.out.print("Enter denominator: ");
           int denom=sc.nextInt();
           FractionClass f=new FractionClass(num,denom);
           System.out.println(f+"\n");
       }
   }

}

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Output

Enter numerator: 10
Enter denominator: 5
Fraction = 10/5
Simplified Fraction = 2

Enter numerator: 5
Enter denominator: 10
Fraction = 5/10
Simplified Fraction = 1/2

Enter numerator: 3
Enter denominator: 2
Fraction = 3/2
Simplified Fraction = 3/2

Enter numerator: 3
Enter denominator: 0
Denominator cannot be zero
Fraction = 3Simplified Fraction = 3

Enter numerator: 3
Enter denominator: 1
Fraction = 3Simplified Fraction = 3