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Thread: Java Program Help

  1. #1
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    Default Java Program Help

    Print out 5 biggest factors of a number that is entered.

    I need help writing a program that will print out the 5 biggest factors of a number that is entered.

    For example:
    Enter A Number: 100
    The 5 Biggest Factors Are: 100, 50, 25, 20, 20.

    But if the number has less than 5 factors print out those factors.
    For example:
    Enter A Number: 7
    The factors for 7 are : 1,7

    Thanks Alot..


  2. #2
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    Default Re: Java Program Help

    What exactly do you need help understanding? All you've posted is basically what your assignment is. How much code have you already done? We can't help you if you don't show us what you've already done.

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    Default Re: Java Program Help

    This is what I have so far. But its only printing out the first 5 factors. I don't know how to print out the biggest 5 factors.

    import java.io.*;
    public class Factors
    {public static input in = new input(); // input library
    public static void main(String[] args) throws IOException
    {int factor;
    int counter = 0;
    System.out.print("Enter A Number: ");
    factor=in.getInt();
    System.out.print("The First Five Factors of " + factor + " are ");
    for (int i=1; i <= factor; i++) {
    if (factor % i == 0) {
    counter ++;
    System.out.print(i + ",");
    }
    else if (counter == 5){
    i = factor;
    }
    }
    }
    }

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    Default Re: Java Program Help

    How far have you gone in the class? If you know how to implement array lists, then I imagine it would be easier to return all of the factors to an array list, sort the array list, and then print the highest factors, up to five integers. I can't think of an easy way to do this without some form of sorting.

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    Default Re: Java Program Help

    Quote Originally Posted by bankston13 View Post
    How far have you gone in the class? If you know how to implement array lists, then I imagine it would be easier to return all of the factors to an array list, sort the array list, and then print the highest factors, up to five integers. I can't think of an easy way to do this without some form of sorting.
    We haven't gone really far in class. We are finishing while loops. My teacher stated that he wants us to use loops to do this program. I don't see how I could do this with loops.

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    Default Re: Java Program Help

    Quote Originally Posted by silvagabriel123 View Post
    This is what I have so far. But its only printing out the first 5 factors. I don't know how to print out the biggest 5 factors.
    Instead of starting at 1 and working your way up in the loop, how about starting at the number and working your way down? Terminate the loop when you have printed five factors or when the factor that you print is equal to 1.

    Cheers!

    Z
    Last edited by Zaphod_b; October 21st, 2012 at 10:23 PM.

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