Posted: 02 Feb 2011 08:25 PM PST

Hey Guys!
I started on Java Programming yesterday(on my own), and im having a bit of trouble..
Here is the code i wrote(bear with me please, i only started yesterday):

Code:

import java.util.*;
 public class calculator {
     
     public static void main(String[] args) {
         Scanner ip = new Scanner(System.in);
         double fnum , snum, ans;
         char resp;
         
         System.out.println("Enter the first number:");
         fnum = ip.nextDouble();
         System.out.println("Enter the second number");
         snum = ip.nextDouble();
         System.out.println("Enter the operation: [+,-,*,/]");
         resp = ip.nextLine().charAt(0);
         if(resp == '+'){
             ans = fnum + snum;
             System.out.println("Answer is "+ ans + ".");
         }
     }
 
 }

Right, this program is a simple calculator. I have completed only a part of it(addition only :P ).
If i run this program it shows up this error :

Quote:

Exception in thread "main" java.lang.StringIndexOutOfBoundsException: String index out of range: 0
at java.lang.String.charAt(Unknown Source)
at calculator.main(calculator.java:14)

so what have i done wrong?
the command i used is

Code:

resp = ip.nextLine().charAt(0);

is for taking the first character enterd isnt it?(im using this bcoz there is no '.nextChar();')
I use the Eclipse IDE for Win-32
-Thanks :)

All about artificial intelligence

Posted: 02 Feb 2011 10:14 AM PST

Let us discuss about artificial intelligence here

Please share anything you know about this topic .It may include definition even

file management

Posted: 02 Feb 2011 03:40 AM PST

please tell me the meaning of supporting primitives for manipulating files and directories with respect to the operation of operating system in file management .......

Crazy Engineers .CoM

Thursday, February 3, 2011

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