Thread: Help me please !!!!!!!!!!!!!!!!

please help me in this question as soon as possible

Design and implement a calculator for Fractions. The user should enter one or two fractions depending on the operation. The possible operations are reduce, add, subtract, multiply, or divide.
The class Fraction should have at least the following methods in addition to instance variables and a constructor:

//add two fractions
public Fraction addFraction(Fraction other);
//subtract two fractions
public Fraction subtractFraction(Fraction other);
//multiply two fractions
public Fraction multiplyFraction(Fraction other);
//divide two fractions
public Fraction divideFraction(Fraction other);
//reduce a fraction
public void reduceFraction();

Display a menu with the following options:

1. Reduce a fraction
2. Add
3. Subtract
4. Multiply
5. Divide
6. Quit

i cannot solve it
i tried many time
please help meeeee

it is not homework
i did part of it
i need anyone to help me

import java.io.*;
import java.util.*;
public class Calculator
{
public static void main(String[] args) throws IOException

{
BufferedReader keyboard = new BufferedReader (new InputStreamReader (System.in));
String input, input1, input2;
double num1, num2, answer;
System.out.println ("\t\t\tWelcome to the calculator!");
do
{
System.out.print ("\nWould you like to Multiply(m), Divide(d), Subtract(s), Add(a)?: ");
input = keyboard.readLine();
if (input.equals("m"))
{
System.out.print ("Please enter the first number!: ");
num1 = Double.parseDouble (input1 = keyboard.readLine());
System.out.print ("Please enter the second number!: ");
num2 = Double.parseDouble (input1 = keyboard.readLine());
answer = num1*num2;
System.out.print ("You chose to multiply."+"\t"+"The Product is: "+answer);
}
if (input.equals("d"))
{
System.out.print ("Please enter the first number!: ");
num1 = Double.parseDouble (input1 = keyboard.readLine());
System.out.print ("Please enter the second number!: ");
num2 = Double.parseDouble (input2 = keyboard.readLine());
answer = num1/num2;
System.out.print ("You chose to divide."+"\t"+"The Dividend is: "+answer);
}
if (input.equals("a"))
{
System.out.print ("Please enter the first number!: ");
num1 = Double.parseDouble (input1 = keyboard.readLine());
System.out.print ("Please enter the second number!: ");
num2 = Double.parseDouble (input2 = keyboard.readLine());
answer = num1+num2;
System.out.print ("You chose to add."+"\t"+"The Sum is: "+answer);
}
if (input.equals("s"))
{
System.out.print ("Please enter the first number!: ");
num1 = Double.parseDouble (input1 = keyboard.readLine());
System.out.print ("Please enter the second number!: ");
num2 = Double.parseDouble (input2 = keyboard.readLine());
answer = num1-num2;
System.out.print ("You chose to subtract."+"\t"+"The Diffrence is: "+answer);
}
System.out.print ("\nWould you like another calculation (y/n)?: ");
input = keyboard.readLine();
}
while(input.equals("y"));
if(input.equals("n"));
System.exit(0);
}
}

Do you have any specific questions about the program?
Or errors you do not understand?
Please post them.

How can i use these



//add two fractions
public Fraction addFraction(Fraction other);
//subtract two fractions
public Fraction subtractFraction(Fraction other);
//multiply two fractions
public Fraction multiplyFraction(Fraction other);
//divide two fractions
public Fraction divideFraction(Fraction other);
//reduce a fraction
public void reduceFraction();

How can i use these

Not sure what you mean by "use these"

Are you asking how to call a method? That's pretty basic programming. What problem are you having? Do you need to read your textbook or the tutorial? Go to this site and read up on methods:
Classes (The Java™ Tutorials > Learning the Java Language > Classes and Objects)

All the methods you've listed take a Fraction object as a parameter and return a Fraction object.