Java Number Pyramid =)

[Alladaskill17]

Hello:

So I am suppose to build a number pyramid that takes a user input for the # of lines ( 1 -15 ), and that generates:

Example:

		   1
	 1	 2	 1
1	2	 4	 2	1

ETC...

I really messed mine up, with an example from the book.

import java.util.Scanner;
public class PowerTriangle{
	public static void main(String[]args){

	 Scanner input = new Scanner(System.in);

	  System.out.println("How lines fo you want?");
	  int LineNum = input.nextInt();

	  if(LineNum < 0 || LineNum > 16);
	  System.out.println("Numberines must be between 1 and 15");

	  for(int row = 1; row <= LineNum; row++){

		 for(int column = 1; column <= LineNum -row; column++)
			 System.out.print("   ");

		  for(int num = row; num >= 1; num--)
			 System.out.print((num >= 10) ? " " + num : "  " + num);

		  for(int num = 2; num <= row; num++)
			 System.out.print((num >= 10) ? " " + num : "  " + num);


  }
 }
}

I need to put "\n" but I dont know where, I got this as a result when I input 6:

How many lines fo you want?
6
Number of lines must be between 1 and 15
				 1			  2  1  2		   3  2  1  2  3		4  3  2  1  2  3  4	 5  4  3  2  1  2  3  4  5  6  5  4  3  2  1  2  3  4  5  6 (all on one line though not shown)
 ----jGRASP: operation complete.

So i need to fix my equations AND get them to format on their own lines.

P.S. I am new to this and am not majoring in computer things, but somehow this is required.

[jamend]

Looks like you just need to add a System.out.println(); to the end of the row loop.

[Alladaskill17]

						1
					 2  1  2
				  3  2  1  2  3
			   4  3  2  1  2  3  4
			5  4  3  2  1  2  3  4  5
		 6  5  4  3  2  1  2  3  4  5  6
	  7  6  5  4  3  2  1  2  3  4  5  6  7
   8  7  6  5  4  3  2  1  2  3  4  5  6  7  8

That is what is coming up.

						 1
					 1   2  1
				  1  2   4  2  1
			   1  2  4   8  4  2  1
			1  2  4  8  16  8  4  2  1
		 1  2  4  8 16  32 16  8  4  2  1
	  1  2  4  8 16 32  64 32 16  8  4  2  1
   1  2  4  8 16 32 64 128 64 32 16  8  4  2  1

That is what I want. 

I need to change the logic but I don?t know how.

[Alladaskill17]

BuMp

[cykosis]

Since your pyramid looks fine, I'll assume you've got the column counting down, so...

Assuming you're on row N, then the logic should be:

Numbers to left of center: range from 2^0 to 2^N-2.

Center number: 2^N-1

Numbers to the right of center: 2^N-2 to 2^0

[Alladaskill17]

So where would I change that in the code to make the pyramid how I want it.

[Andrew Lyle Global Moderator]

Looks like a homework project, you should of paid attention!

[Bookieass]

  Alladaskill said:

						1
					 2  1  2
				  3  2  1  2  3
			   4  3  2  1  2  3  4
			5  4  3  2  1  2  3  4  5
		 6  5  4  3  2  1  2  3  4  5  6
	  7  6  5  4  3  2  1  2  3  4  5  6  7
   8  7  6  5  4  3  2  1  2  3  4  5  6  7  8

That is what is coming up.

						 1
					 1   2  1
				  1  2   4  2  1
			   1  2  4   8  4  2  1
			1  2  4  8  16  8  4  2  1
		 1  2  4  8 16  32 16  8  4  2  1
	  1  2  4  8 16 32  64 32 16  8  4  2  1
   1  2  4  8 16 32 64 128 64 32 16  8  4  2  1

That is what I want. 

I need to change the logic but I don?t know how.

Hi, i think I got it some working

Look for this image

Your whole program output can be splittted in two parts

Part 1 : First Triangle which increases from left to right

Part2 : Second Traingle which decreases from left to right

I have completed coding for first triangle that is Part 1

It is in C#..... Please bear with me

  Quote

namespace ConsoleApplication2

{

class Program

{

static void Main(string[] args)

{

int temp =1;

for (int i = 6; i>0; i--)//for number of times the loop should run

{

//Assuming that we need spacing btwn two integers, so logically we need to double the spaces

for (int x = 1; x<i*2; x++)//for number of times the space should occur in a given loop

{

Console.Write("_

}

Console.Write( temp );

for (int j = i; j < 6; j++)

{

temp *= 2;

Console.Write(" " + temp);//Printng the numbers

}

Console.WriteLine();

temp = 1;

// you need to implement the reverse of this below

}

Console.ReadLine();

}

}

}

It will result in this form

//Please ignore the "_", i have put purposefully for your understanding

Hope it helps:):)

[tunafish]

Barely 2 hours between posts and he bumps it again! This is also the 2nd time this user has basically requested us to do his homework

[mail]

Edit don't worry.

[Axel]

  lylesback2 said:

Looks like a homework project, you should of paid attention!

Should "have" paid attention ;) Maybe someone else didn't always listen in class :p