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Dec 1st, 2008

how to sort the output in descending

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alright..
i have a problem on how to sort the output
my code is here:

Java Syntax (Toggle Plain Text)
public class Num7
{
	public static void main(String[]args)
	{
	char[] ch;
	ch=new char[20];
	int i;	
	for(i=0;i<ch.length;i++)
	System.out.print(i);
	}
}
public class Num7
{
	public static void main(String[]args)
	{
	char[] ch;
	ch=new char[20];
	int i;	
	for(i=0;i<ch.length;i++)
	System.out.print(i);
	}
}

the output is simply:

Java Syntax (Toggle Plain Text)

 
012345678910111213141516171819

all i want to do is to print first 19,18 and so on.
what should i modify?

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beginner21

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since Nov 2008

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Dec 1st, 2008

Re: how to sort the output in descending

I feel you are posting your class assignments here one by one, while we do not have any problem outright with that there should be some effort from your side that comes across from your query/ problem. We haven't seen any such effort as yet from you on this post.
Read this before posting such queries here.

verruckt24

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Dec 1st, 2008

Re: how to sort the output in descending

ok,
this is my modify code:

Java Syntax (Toggle Plain Text)
 
public class Num7
{
	public static void main(String[]args)
	{
 
	char[] ch={'1','2','3','4','5','6','7','8','9'};
	int x,y,z;	
	for(x=ch.length;x>0;x--)
	{
	System.out.print(x);
	}
	System.out.println();
	for(y=ch.length;y>0;y--)
	{
	System.out.print(y);
	}
	z=x*y;
	System.out.println("\nThe sum is: "+z);
	}
}
public class Num7
{
	public static void main(String[]args)
	{
	
	char[] ch={'1','2','3','4','5','6','7','8','9'};
	int x,y,z;	
	for(x=ch.length;x>0;x--)
	{
	System.out.print(x);
	}
	System.out.println();
	for(y=ch.length;y>0;y--)
	{
	System.out.print(y);
	}
	z=x*y;
	System.out.println("\nThe sum is: "+z);
	}
}

it display the values i entered on the array backward,
and that's what i want,
the problem is the value of z,
z is always 0;
i cant figure out whats the problem,
can you help?

Last edited by beginner21; Dec 1st, 2008 at 3:17 am. Reason: code tags

beginner21

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Dec 1st, 2008

Re: how to sort the output in descending

In Your code int x,y; are indexes of loop - for.
When loops finished x=0 and y=0.Multipy them result is 0.
You not using char[] ch={'1','2','3','4','5','6','7','8','9'}; table. More proper is declare table as int.
Analyse this:

java Syntax (Toggle Plain Text)
    public static void main(String[] args) {
 
        int[] table = {9,8,7,6,5,4,3,2,1,0};
 
        for (int x = table.length-1; x >= 0; x--) {
            System.out.print("x=");
            System.out.print(x);
            System.out.print(" ");
            System.out.print("table[x]=");
            System.out.print(table[x]);
            System.out.println();
        }
        System.out.println();
    }
    public static void main(String[] args) {

        int[] table = {9,8,7,6,5,4,3,2,1,0};
       
        for (int x = table.length-1; x >= 0; x--) {
            System.out.print("x=");
            System.out.print(x);
            System.out.print(" ");
            System.out.print("table[x]=");
            System.out.print(table[x]);
            System.out.println();
        }
        System.out.println();
    }

quuba

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