/*Program prompts user to enter integers seperated by spaces, converts them to n

Question

/*Program prompts user to enter integers seperated by spaces, converts them to numbers and adds them, I am supposed to define each line of code and find the bug, I can't find the bug PLEASE HELP*/

import java.util.*;

public class DebugSeven2

{

public static void main(String[] args)

{

String str;

int x;

int length;

int start = 0;

int num;

int lastSpace = -1;

int sum = 0;

String partStr; Scanner in = new Scanner(System.in);

System.out.print("Enter a series of integers separated by spaces >> ");

str = in.nextLine(); length = length();

for(x = 0; x <= length; ++x)

{

if(str.charAt(x) == " ")

{

partStr = str.substring(x, lastSpace + 1);

num = Integer.parseInt(partStr);

System.out.println(" " + num); sum = num; lastSpace == x;

}

}

partStr = str.substring(lastSpace + 1, length);

num = Integer.parseInt(partStr);

System.out.println(" " + num);

sum = num;

System.out.println(" -------------------" + " The sum of the integers is " + sum);

}

}

Explanation / Answer

/* package whatever; // don't place package name! */

import java.util.*;
import java.lang.*;
import java.io.*;

/* Name of the class has to be "Main" only if the class is public. */
class DebugSeven2
{
   public static void main (String[] args) throws java.lang.Exception
   {
       // your code goes here
       String str;
       int x;
       int length;
       int start = 0;
       int num;
       int lastSpace = -1;
       int sum = 0;
       String partStr;
       Scanner in = new Scanner(System.in);
       System.out.print("Enter a series of integers separated by spaces >> ");
       str = in.nextLine();
       length = str.length(); //should be str.length not length()
       for(x = 0; x < length; x++) //should run upto length-1 not to the length
       {
           if(str.charAt(x) == ' ')//should be checking blank space character not string
           {
               partStr = str.substring(lastSpace + 1,x); //first index should be less than second
               num = Integer.parseInt(partStr);
               System.out.println(" " + num);
               sum = sum+num; //Should be sum = sum+num not sum = num
               lastSpace = x; //should be assignment not equality
           }
       }
       partStr = str.substring(lastSpace + 1, length);
       num = Integer.parseInt(partStr);
       System.out.println(" " + num);
       sum = sum+num; //Should be sum = sum+num not sum = num
       System.out.println(" -------------------" + " The sum of the integers is " + sum);
}
}

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