Adding and subtracting rational numbers

[lmacayb]

Hello I am having trouble getting strated with my program. I am trying to write a java program that adds and subtracts rational numbers. Can anyone help? This is what I have so far:

import java.util.Scanner;
public class Rational
{
priviate int numerator;
priviate int denominator;
public Rational()
{
    numerator=0;
    denominator=1;
}
public Rational(int num,int dem)
{
    num=num;
    dem=dem;
}
 
public void setNumerator(int num)
{
    num=num;
}
public void setDenominator(int dem)
{
    dem=dem;
}
public void getNumerator()
{
    return num;
}
public void getDenominator()
{
    return dem;
}
public static Add
{
}
public static Subtract
{
}
}
 

[SammyB]

That's a good start in that you have outlined what needs to be done!

You need to write a main to test this class. It should at least create a new rational, then get and print the numerator and denominator.

But, do your constructor/getters/setters really do any thing? Think about where they need to get/set the data from/to.

Now, how do you add/subtract fractions? Write down the steps that you would do manually for say 1/2 + 2/3 and then compose the code.

HTH --Sam

[pbrockway2]

I would suggest you compile your code. (every time you make a change.) The compiler messages are very useful.

If there is a compiler message you cannot understand post the exact and entire thing and indicate which line of your code it refers to.