Question

Write a program that lets the user perform arithmetic operations on fractions. Fractions are of the form a/b, in which a and b are integers and b is not equal to 0. Your program must be menu driven, allowing the user to select the operation ( , -, *, or /) and input the numerator and the denominator of each fraction. Furthermore, your program must consist of at least the following function
menu: This function informs the user about the program's purpose, explains how to enter data, how to quit and allows the user to select the operation.
addFractions: This function takes as input four integers representing the numerators and denominators of two fractions, adds the fractions, and returns the numerator and denominator of the result.
subtractFractions: This function takes as input four integers representing the numerators and denominators of two fractions, subtracts the fractions, and returns the numerator and denominator of the result.
multiplyFractions: This function takes as input four integers representing the numerators and denominators of two fractions, multiplies the fractions, and returns the numerator and denominator of the result.
divideFractions: This function takes as input four integers representing the numerators and denominators of two fractions, divides the fractions, and returns the numerator and denominator of the result.

Here are some sample outputs of the program:

3 / 4 +2 / 5 = 23 / 20
2 / 3 * 3 / 5 = 2 / 5

Answer 1

Answer:

Explanation:

The following code is written in Java, It asks the user to enter the numerator and denominator for both fraction 1 and 2. Then it prompts the user with a menu to choose the desired operation. The choice is passed into a switch statement and calls the correct function.

import java.util.Scanner;

class Brainly {

   public static void main(String[] args) {

       Scanner in = new Scanner(System.in);

       int num1, num2, den1, den2;

       System.out.println("Enter numerator for fraction 1: ");

       num1 = in.nextInt();

       System.out.println("Enter denominator for fraction 1: ");

       den1 = in.nextInt();

       System.out.println("Enter numerator for fraction 2: ");

       num2 = in.nextInt();

       System.out.println("Enter denominator for fraction 2: ");

       den2 = in.nextInt();

       System.out.println("Menu:");

       System.out.println("+ = add fractions");

       System.out.println("- = subtract fractions");

       System.out.println("/ = divide fractions");

       System.out.println("* = multiply fractions");

       String answer = in.next();

       switch (answer.charAt(0)) {

           case '+': add(num1, den1, num2, den2); break;

           case '-': subtract(num1, den1, num2, den2); break;

           case '*': multiply(num1, den1, num2, den2); break;

           case '/': divide(num1, den1, num2, den2); break;

       }

   }

   public static void add(int num1, int den1, int num2, int den2) {

       int num3 = (num1 * den2) + (num2 * den1);

       int den3 = den1 * den2;

       System.out.println("New Fraction: " + num3 + " / " + den3);

   }

   public static void subtract(int num1, int den1, int num2, int den2) {

       int num3 = (num1 * den2) - (num2 * den1);

       int den3 = den1 * den2;

       System.out.println("New Fraction: " + num3 + " / " + den3);

   }

   public static void divide(int num1, int den1, int num2, int den2) {

       int num3 = num1 * den2;

       int den3 = den1 * num2;

       System.out.println("New Fraction: " + num3 + " / " + den3);

   }

   public static void multiply(int num1, int den1, int num2, int den2) {

       int num3 = num1 * num2;

       int den3 = den1 * den2;

       System.out.println("New Fraction: " + num3 + " / " + den3);

   }

}