Solved

How to write a program using this statement, int n = (int)Math.floor(Math.random()*100000+1);?

Posted on 2011-03-24
3
420 Views
Last Modified: 2012-05-11
Math
How to write a program using this statement, int n = (int)Math.floor(Math.random()*100000+1);?



lass GuessingGame {  

     public static void main(String[] args) {      

         int n = (int)Math.floor(Math.random()*100000+1);  

         int sum = 0;  

         int digit;  

         number = x;  

         digit = x % 10;  

         sum += digit;  

         x = x/10;  

         digit = x % 10;  

         sum += digit;  

         x = x/10;  

         digit = x % 10;  

         sum += digit;  

         x = x/10;  

         digit = x % 10;  

         sum += digit;  

         System.out.println("Given number= "+number+"; sum of digits = "+sum);  

     }  

 }
0
Comment
Question by:waltbaby315
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
3 Comments
 

Author Comment

by:waltbaby315
ID: 35212123
hi
0
 
LVL 9

Accepted Solution

by:
TBK-Consulting earned 500 total points
ID: 35212310
what exactly are you trying to accomplish?  Have the computer guess a number that the user randomly chose between 1 and 100,000??? if so - I'd have it do the following - (pseudo-coded as I am not good with languages)

Get Random Number between 2 and 100,000 and store in Guess
Set Low Guess = 0
Set High Guess = 100001
Start Loop
     Ask User if Guess is correct and ask for lower or higher
     If higher
          move guess to low guess
          if guess + 100 <  high guess
               add 100 to guess goto start loop
          else if guess +10 < high guess
              add 10 to guess goto start loop
              else add 1 to guess goto start loop
     if lower
          move guess to high guess
          if guess - 100 > low guess
               subtract 100 from guess goto start loop
          else if guess - 10 > low guess
               subtract 10 from guess goto start loop
               else subtract 1 from guess goto start loop
End Loop


NOTE - the more nested if's you put in the faster the program should get to the correct number.
0
 
LVL 37

Expert Comment

by:TommySzalapski
ID: 35234565
Your program is fine (well, it has errors), but you should really use a loop. Like this:
   public static void main(String[] args) 
   {      
 
         int n = (int)Math.floor(Math.random()*100000+1);  

         int sum = 0;  

         int digit;  

         int x = n;  

         while(x > 0)
         {
            digit = x % 10;  
            x /= 10;
            sum += digit;  
         }
         System.out.println("Given number= "+number+"; sum of digits = "+sum);  

     }  

Open in new window

0

Featured Post

Free Tool: ZipGrep

ZipGrep is a utility that can list and search zip (.war, .ear, .jar, etc) archives for text patterns, without the need to extract the archive's contents.

One of a set of tools we're offering as a way to say thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

How to Win a Jar of Candy Corn: A Scientific Approach! I love mathematics. If you love mathematics also, you may enjoy this tip on how to use math to win your own jar of candy corn and to impress your friends. As I said, I love math, but I gu…
Lithium-ion batteries area cornerstone of today's portable electronic devices, and even though they are relied upon heavily, their chemistry and origin are not of common knowledge. This article is about a device on which every smartphone, laptop, an…
Although Jacob Bernoulli (1654-1705) has been credited as the creator of "Binomial Distribution Table", Gottfried Leibniz (1646-1716) did his dissertation on the subject in 1666; Leibniz you may recall is the co-inventor of "Calculus" and beat Isaac…
Finds all prime numbers in a range requested and places them in a public primes() array. I've demostrated a template size of 30 (2 * 3 * 5) but larger templates can be built such 210  (2 * 3 * 5 * 7) or 2310  (2 * 3 * 5 * 7 * 11). The larger templa…

688 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question