Logic needed for buiding numbers pyramid

**srinivas31** · 01-07-2012

Code:

EDIT:
the above pyramid looks like a doom.i.e 1-5 will be in center.1-4(L)1-3(L)1-2(L)1(L) similarly 1-4(R) 1-3(R) 1-2(R) 1(R)

I'm partly successful in building the requirement of the program.but cant able to think the logic for the other half.please tell me how can i proceed.below is the code written in c#.

Code:

            for (int i = 1; i <= 5; i++)
            {
                //int l = 1;
                int k = 1;
                for (int j = 5; j >=1; j--)
                {
                    if (j > i)
                    {
                        Console.Write(" ");
                    }
                    else
                    {
                        Console.Write(k++);
                    }
                 
                   
                }

                Console.WriteLine();
               
            }

**quzah** · 01-07-2012

Code:

Ok. If your number is 5, then you have 5-centernumber spaces to the left (and to the right)

So you write out that many space.
Then you write numbers from 1 to centernumber-1.
Then you write the center number.
Then you write numbers from centernumber-1 to 1.

All of that is one line. For each line from 1 to number, do all of that, and at the start of the next line, increment the center number.

Quzah.

**srinivas31** · 01-08-2012

Originally Posted by quzah

Code:

Ok. If your number is 5, then you have 5-centernumber spaces to the left (and to the right)

So you write out that many space.
Then you write numbers from 1 to centernumber-1.
Then you write the center number.
Then you write numbers from centernumber-1 to 1.

All of that is one line. For each line from 1 to number, do all of that, and at the start of the next line, increment the center number.

Quzah.

thanks for the response.i'll try this.

**hqt** · 01-18-2012

I have a formular, that doesn't need to count for each number. (it means if you know n lines: line i like y_coor, at line i, j(th) like x_coor, so I know what number at coordinate(x,y). But maybe It is not nescessary. Here is my straightforward code same with quxah idea:

Code:

namespace Program
{
    class Program
    {
        static void Main(string[] args)
        {
            // print triangle
            int n = 5;
            /* three phrase: 
             * first: find first location of the line
             * second: print increasing
             * third: print decreasing */
            int k=n;
            for (int i = 0; i <n; i++)  //print n line
            {
                //  first
                for (int j = 1; j <= k; j++) Console.Write(" ");
                // second
                for (int j = 1; j <= i; j++) Console.Write(j);
                // third
                for (int j = i + 1; j >= 1; j--) Console.Write(j);
                k--;
                Console.WriteLine();
            }
 
        }
    }
}

@: Oh, I'm sorry, the lastest post has appeared last week. I just post a new one because I just want to practice C# code.

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