# Stuck at polynomial program

Tso Yee

Greenhorn

Posts: 2

posted 10 years ago

Hi, I am stuck at making a rational polynomial program. I have made a class to handle Rational numbers but at the second problem it asks to make a program for RationalPolynomials and I don't know how to start this. I don't understand the arrays much.

Here I have my rational class: http://files.webhop.biz/Rational.txt

And here the problem 2, its long so I make it an image: http://files.webhop.biz/RP_P2.jpg

Can someone help me how to make this? I have to turn it in soon. Thanks for any help.

Here I have my rational class: http://files.webhop.biz/Rational.txt

And here the problem 2, its long so I make it an image: http://files.webhop.biz/RP_P2.jpg

Can someone help me how to make this? I have to turn it in soon. Thanks for any help.

Ulf Dittmer

Rancher

Posts: 42968

73

jiju ka

Ranch Hand

Posts: 308

posted 10 years ago

Seems like you are planning to use arrays to store each element in a polynomial.

Each Element have a Rational number as coeffecient, A variable x and an exponent. You need to have a class to represent each element. Call the class 'Element'. Then an array (or collection) of Elements represent your rational polynomial.

If ordering of elements is important, You may use an array or an implementation of OrderedList. Another idea is to extend HashMap and use exponent as key(key need to be non-primitive type).

Below is how you declare a single dimension array.

To initialize the array you need to know the size(number of elemts needed). You can obtain the 'polynomialSize' by counting the '+' (or '-').

Now the array can be initialized by

Now asigning values to polynomial....

In a loop construct each 'Element'. use i as index.

You can refrence the polynomial elements as below.

You have the basics of Array by now.

it asks to make a program for RationalPolynomials and I don't know how to start this. I don't understand the arrays much.

Seems like you are planning to use arrays to store each element in a polynomial.

Each Element have a Rational number as coeffecient, A variable x and an exponent. You need to have a class to represent each element. Call the class 'Element'. Then an array (or collection) of Elements represent your rational polynomial.

If ordering of elements is important, You may use an array or an implementation of OrderedList. Another idea is to extend HashMap and use exponent as key(key need to be non-primitive type).

Below is how you declare a single dimension array.

To initialize the array you need to know the size(number of elemts needed). You can obtain the 'polynomialSize' by counting the '+' (or '-').

Now the array can be initialized by

Now asigning values to polynomial....

In a loop construct each 'Element'. use i as index.

You can refrence the polynomial elements as below.

You have the basics of Array by now.

It is sorta covered in the JavaRanch Style Guide. |