Multiplication Table

[BillyB]

I am new to arrays and working on a multiplication table. The code below works fine and displays as follows:

1 2 3
2 4 6
3 6 9

I have been trying to have the output look a bit different with no luck.
I would like the output to look like this:

0| 1 2 3 //I would like the zero space and | to be a blank space in this line
1| 1 2 3
2| 2 4 6

My code:

/*MultiplyTbl
 * 
 */

import java.util.*;

public class MultTable 
{
  public static void main(String[] args) 
    {
       // declare variables
       int[][] table = new int[13][13]; //max 12 for table
		
       Scanner question = new Scanner(System.in);
       System.out.println("Enter 1 for full table OR 2 for specific number:");
       int ans = question.nextInt();
		
       if (ans==1)
	{
	   //generate the full multiplication table
	   for(int row = 1; row < 13; row++) //for rows starting at number 	      {
	          for(int col = 1; col < 13; col++)  //for columns
		{	
		    table[row][col] = row * col;
		    System.out.print(table[row][col] + "\t");

	              }// end for col
	       System.out.println();				
	       }// end row

	  }// end if
	System.out.println();

             //an else statement goes here but not necessary for solution
         }//end main
}//end class

[Eranga]

System.out.print((row - 1) + " | ");

where to add that?

[Eranga]

By the way, please use code tags next time. Unformated codes are really hard to read. If you don't know how to do that, check on my forum signature. :)

[AcousticBruce]

Hey Billy.


Can you be a little more clear on what you are trying to accomplish?

[Eranga]

With the description at the top, he's clear with what he wants to do, isn't it. ;)

[AcousticBruce]

With the description at the top, he's clear with what he wants to do, isn't it. ;)

For you maybe.

I would like the zero space and | to be a blank space in this line

that doesn't make sense to me.

[Eranga]

I would like the output to look like this:

That gives you the whole picture.

[BillyB]

What I would like to try and do is have the first row/column table[0][0] to be blank...no thing there. The result would look like and Excel worksheet with the numbers starting in the second column of the first row and the second row of the first column. I would like the | separator to only show following the numbers in column[0] in the second row. Maybe this will help:

blank 1 2 3

1| 1 2 3
2| 2 4 6
3| 3 6 9

Thank you.

[AcousticBruce]

......... Edit

[AcousticBruce]

I had a class open called Sum2Power and used that to test out this code. So don't mind the name.

I added a few extra " " spaces in the System.out.print codes.
If you have a different font for your output and it is skewed. Just delete the extra " " spaces in the code.

Here is my idea.

public class Sum2Power {

    public static void main(String[] args) {

       
        int[][] tTable = new int[13][13];

        for (int row = 0; row < 13; row++) {
            for (int col = 0; col < 13; col++) {

                if (col == 1) {
                    if (row != 0) {
                        System.out.print("|  "); // I added 2 spaces after "|" to make it look better.
                    }   else {
                        System.out.print("   "); // I added 2 more spaces to " " as I did above. Otherwise it skews.
                    }


                }
                tTable[row][col] = (row + 1) * (col );
                if (row*col == 0) {
                    tTable[row][0] = row;

                }
                if (tTable[row][col] == 0) {
                    System.out.print("    "); //added 3 " " spaces here.
                } else {
                    System.out.print(tTable[row][col] + "\t");
                }
            }
            System.out.println();
        }

My output was

           1    2	3	4	5	6	7	8	9	10	11	12	
1	|  2	4	6	8	10	12	14	16	18	20	22	24	
2	|  3	6	9	12	15	18	21	24	27	30	33	36	
3	|  4	8	12	16	20	24	28	32	36	40	44	48	
4	|  5	10	15	20	25	30	35	40	45	50	55	60	
5	|  6	12	18	24	30	36	42	48	54	60	66	72	
6	|  7	14	21	28	35	42	49	56	63	70	77	84	
7	|  8	16	24	32	40	48	56	64	72	80	88	96	
8	|  9	18	27	36	45	54	63	72	81	90	99	108	
9	|  10	20	30	40	50	60	70	80	90	100	110	120	
10	|  11	22	33	44	55	66	77	88	99	110	121	132	
11	|  12	24	36	48	60	72	84	96	108	120	132	144	
12	|  13	26	39	52	65	78	91	104	117	130	143	156

[BillyB]

I appreciate the time and effort. Have a great day!

[Eranga]

Is that what you expected?

[Eranga]

If you have a different font for your output and it is skewed. Just delete the extra " " spaces in the code.

With spaces, but not with tabs. But again align is difficult with different number of digits.

[temyong]

I think the positions of the numbers (left side) are not in correct positions. :confused:

[Eranga]

I think the positions of the numbers (left side) are not in correct positions. :confused:

You mean digit sequences are not matched. As I said in my previous post, formatting is bit of difficult in such case. AcousticBruce done it with use spaces nicely, and I hope he may have confusion with adding those spaces. :)

[BillyB]

Eranga,

I think the answer by AcousticBruce comes close enough. Thank you both for your help.

[Eranga]

You are welcome. If you satisfied with the solution given by AcousticBruce, then please mark the thread solved. :)

[AcousticBruce]

Just for the hell of it, I added a couple lines and changed some numbers (in red). Dont worry I have a blast doing this stuff.

public class TestApps {

    public static void main(String[] args) {


        int[][] tTable = new int[COLOR="Red"][15][14][/COLOR];

        for (int row = 0; row < [COLOR="Red"]14[/COLOR]; row++) {
            for (int col = 0; col < 13; col++) {

                if (col == 1) { //This creates the device of "|".
                    if (row != 0 [COLOR="Red"]&& row != 1[/COLOR]) {  // if (row > 1) would have worked just as well :D
                        System.out.print("|  "); // I added 2 spaces after "|" to make it look better.
                    }   else {
                        System.out.print("   "); // I added 2 more spaces to " " as I did above. Otherwise it skews.
                    }


                }
              [COLOR="Red"]  if (row == 0) {                //Added this for the top row line 1-12.
                	tTable[row][col] = col;

                }[/COLOR]

                tTable[COLOR="Red"][row+1[/COLOR]][col] = [COLOR="Red"](row) [/COLOR]* (col );
                if (row*col == 0) {   // Added this for the left column line 1-12.
                    tTable[row+1][0] = row;

                }
                if (tTable[row][col] == 0) {  //This puts the space in the top left corner.
                    System.out.print("    "); //added 3 " " spaces here.
                } else {
                    System.out.print(tTable[row][col] + "\t");
                }
            }
            System.out.println();
        }
    }
}

The new output

           1	2	3	4	5	6	7	8	9	10	11	12	
                                                       
1	|  1	2	3	4	5	6	7	8	9	10	11	12	
2	|  2	4	6	8	10	12	14	16	18	20	22	24	
3	|  3	6	9	12	15	18	21	24	27	30	33	36	
4	|  4	8	12	16	20	24	28	32	36	40	44	48	
5	|  5	10	15	20	25	30	35	40	45	50	55	60	
6	|  6	12	18	24	30	36	42	48	54	60	66	72	
7	|  7	14	21	28	35	42	49	56	63	70	77	84	
8	|  8	16	24	32	40	48	56	64	72	80	88	96	
9	|  9	18	27	36	45	54	63	72	81	90	99	108	
10	|  10	20	30	40	50	60	70	80	90	100	110	120	
11	|  11	22	33	44	55	66	77	88	99	110	121	132	
12	|  12	24	36	48	60	72	84	96	108	120	132	144	

Process completed.