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  1. #1
    trofyscarz is offline Member
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    Default printing two smallest numbers from a series of numbers

    Instructions: Write and debug a program by implementing a class called twoSmallest, which prompts the user to enter a series of numbers. Each number can have a fractional part. The user indicates the end of the list by typing a “z” as the next number. The program then prints out the two smallest numbers among the list that the user typed. The result for this problem should be a Java file called twoSmallest.java.

    I am having no problem exiting the loop and printing the smallest number, I just cant figure out how to print the second smallest number.
    Any suggestions?


    import java.util.Scanner; // Needed for the Scanner class
    public class TwoSmallest
    {

    public static void main(String[] args)
    {

    double smallest = Double.MAX_VALUE;
    double secondsmallest ;

    // Create a Scanner object for keyboard input.

    Scanner sc = new Scanner(System.in);

    // Display general instructions.

    System.out.println("Enter a series of numbers.");

    System.out.println("Press Z to exit the program.\n");

    boolean exit = false;

    while (!exit)

    {

    System.out.print("Enter a value ");

    String input = sc.next();

    if (input.equalsIgnoreCase("Z"))

    exit = true;

    else

    {

    double x = Double.parseDouble(input);

    smallest = Math.min(smallest ,x);
    }

    }

    System.out.println("Smallest number: " + smallest);

    }

    }

  2. #2
    emceenugget is offline Senior Member
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    Default

    Two quick solutions I could think of.

    1. You can take the easy route by inserting all inputs into a list, sorting it, and taking the first two values.

    2. Obviously, you can keep track of two numbers instead of one in your loop. It only takes a little bit of thinking on how you would update those variables as you get each input.

  3. #3
    Norm's Avatar
    Norm is online now Moderator
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    Default

    I just cant figure out how to print the second smallest number.
    This should do it:
    System.out.println("Second smallest= " + secondsmallest);

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