Help With Basic Java(Just Starting Out)

Well, I am just starting out with learning Java, and I was doing this excercise. The point was to make a program that

class Example4
{
public static void main ( String[] args )
{
double x, value;
x = 2/3 ;
System.out.println("Answer is:" + (3*(x*x)- 8*x + 4));
}
}


Now, the next excercise says this:

Modify the program in exercise 2 so that one run of the program will evaluate and write out the value of the quadradic for three different values of X: 0.0, 2.0, and 4.0 (or any three values of your choice.)

Write the program using only two variables, probably called x and value. Of course this means that you will have to put different things in these variables in different places in the program.


Now I have no idea how to do this. Can anyone help me out. Thanks.

I would advise you to start by making a function that computes the quadratic based on any given input for x and returns the answer. Then call that function with your values asigning the answer to value after each and printing it.

-KM-

class Example4
{

public static void main ( String[] args ){
System.out.println("Answer is:" + evaluate(0.0));
System.out.println("Answer is:" + evaluate(2.0));
System.out.println("Answer is:" + evaluate(4.0));
}

double evaluate(double x){
return (3*(x*x) - 8*x + 4);
}

}

_____________________________________________________
Sharon White