Thread: Cant figure out how to moudulus!!!??

Okay so basiclly my problem is I cant figure out how to properly modulus three variables. Since I am very new to java it would be much easier if I just post my problem!

MessageBoxProgram_float.doc

These are my directions ^^^^

This is what I'm having trouble doing in the directions: Add the first 2 numbers and Modulus by the third number, store the result in fresult.

And this is my code:

//CISS-110-361
//Jacob Lindsay
//Coding Assignment 3 - Three Numbers
 
import javax.swing.JOptionPane;
 
public class MessageBoxProgram
{
  public static void main(String[] args)
  {
    String snum1, snum2, snum3;                  //Variables
    float fnum1, fnum2, fnum3, fresult;
 
    //Get variables from user and store them
    snum1 = JOptionPane.showInputDialog("Please enter a deciaml number ");
    fnum1 = Float.parseFloat(snum1);
 
    snum2 = JOptionPane.showInputDialog("Please enter second deciaml number ");
    fnum2 = Float.parseFloat(snum2);
 
    snum3 = JOptionPane.showInputDialog("Please enter third deciaml number ");
    fnum3 = Float.parseFloat(snum3);
 
    //Perform calculations
    fnum3%= (fnum1 + fnum2);
    fresult = fnum3;
 
    //Display user input numbers
    JOptionPane.showMessageDialog(null,"Your numbers were: " + snum1 
                                    +", " + snum2
                                    +", " + snum3);
    //Show result of calculations
    JOptionPane.showMessageDialog(null,"The result is " + fresult );
    String.format("%.2f");
  }
}

Please I dont understand how to do the modulus on the two other numbers! I am so stumped its not even funny! This is an assignment due tonight so it would be greatly appreciated if someone could help me(The directions in the word file will help understand what im trying to do!)!

Here is a resource that you could use that talks about modules Modules in the Java Language and VM

Thanks for the reply but that doesn't have anything to do with my problem I'm pretty sure

So I added some comments where I need help and an explanation. I posted my directions for writing the program if you look at that it will show what I need to do according to the modulus part of my problem!

//CISS-110-361
//Jacob Lindsay
//Coding Assignment 3 - Three Numbers
 
import javax.swing.JOptionPane;
 
public class MessageBoxProgram
{
  public static void main(String[] args)
  {
    String snum1, snum2, snum3;                  //Variables
    float fnum1, fnum2, fnum3, fresult;
 
    //Get variables from user and store them
    snum1 = JOptionPane.showInputDialog("Please enter a deciaml number ");
    fnum1 = Float.parseFloat(snum1);
 
    snum2 = JOptionPane.showInputDialog("Please enter second deciaml number ");
    fnum2 = Float.parseFloat(snum2);
 
    snum3 = JOptionPane.showInputDialog("Please enter third deciaml number ");
    fnum3 = Float.parseFloat(snum3);
 
    //Perform calculations
    fnum3%= (fnum1 + fnum2);         //HERE is where I am having problems!!!!!!
    fresult = fnum3;                //I am trying to get the modulus of fnum1 + fnum2 and it is only giving me the value of fnum1
                                    // Say I put in 8 for fnum1 10 for fnum2 and 18 for fnum3... it's supposed to  return the modulus(in this case it would be 0)
    //Display user input numbers       but instead it displays 8, the value of fnum1 which is incorrect
    JOptionPane.showMessageDialog(null,"Your numbers were: " + snum1 
                                    +", " + snum2
                                    +", " + snum3);
    //Show result of calculations
    JOptionPane.showMessageDialog(null,"The result is " + fresult );
    String.format("%.2f");
  }
}

Thank you for the information, I do know that it is the remainder I just cant seem to correctly place the modulus with the variables in my code to get the modulus of fnum1 + fnum2 by fnum3
The step I need help with: Add the first 2 numbers(fnum1 & fnum2) and Modulus by the third number(fnum3), store the result in fresult.

But wouldnt I need to declare another fresult? Sorry for my lack of understanding this, this is the hardest thing I have run into for some reason and I'm not sure why..

//Perform calculations
    fresult = fnum1 + fnum2;
    fnum3%= fresult;

I know this doesn't work because its telling me that variable fnum3 is not used and I cant add anymore variables to the code because thats not what the assignment asks to do.. So stumped on this

Yea I see what you're saying but my professor wanted us to do this with the variables he gave us. If I end up having to use an extra variable just to turn it in by tonight then I guess I'll have to do that but I feel like there's another way to do it that I'm not seeing..

Yes I have tried to write it down on paper, thats one of the things my professor has us do. And can you explain a little more about using the () for fresult? I'm not sure what I would be using that for.

--- Update ---

I got it!!!

//Perform calculations
    fresult = (fnum1 + fnum2) % fnum3;

..I feel like the biggest nub ever. But thank you guys for steering me in the right direction and making me figure it out myself instead of blatantly giving me the answer!