correct codes for displaying binary numbers triangle?????

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I am trying to write a C sharp program to display something like this

1
01
101
0101 but i'm having trouble doing that.So far i can display only like this

1
10
101
1010. i know its simple for you guys..i need help...anyone??? thanks in advance...
Here is my coding so far..........

C#

static void Main(string[] args)
{
    String input;
    int i, j, ran;
    Console.WriteLine("Enter the Range:");
    input = Console.ReadLine();
    ran = Convert.ToInt16(input);

    for (i = 1; i <= ran; i++)
    {
        for (j = 1; j <= i; j++)
        {
            if (j % 2 == 0)
            {
                Console.Write("0 ");
            }
            else
            {
                Console.Write("1 ");
            }
        }
        Console.WriteLine();
    }
    Console.Read();
}

[Added code formatting]

Posted 14-Apr-10 3:45am

damaxy

Updated 14-Apr-10 8:11am

Toli Cuturicu

v3

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LittleYellowBird · Answer 1 · 2010-04-14T04:00:00

Since you code works nicely except that the 1's and 0's come out backwards, howabout starting the inner loop with j = i and reduce it by 1 each time, stopping at 1?
ie

for (j = i; j >= 1 ; j--)
{
      if (j % 2 == 0)
      {
            Console.Write("0 ");
      }
      else
      {
            Console.Write("1 ");
      }
}

I haven't tried it, just an idea for you. :)

[edit]Converted to code block to preserve formatting[/edit]
[edit]Cheers! :) Ali[/edit]

OriginalGriff · Answer 2 · 2010-04-14T04:17:00

Solution 2

Alison beat me to it! just a small improvement to her solution - you don't need the if condition:

for (int j = i; j > 0; j--)
    {
    Console.Write("{0} ", j & 1);
    }
Console.WriteLine();

Posted 14-Apr-10 4:17am

OriginalGriff

George Swan · Answer 3 · 2015-08-22T23:59:00

You don't actually need the inner for loop. All that is happening is that a 0 or a 1 is being prepended to the previous string. So you can do this.

C#

StringBuilder sb= new StringBuilder();
           int count = 5;

           for (int t = 1; t <= count; t++)
           {
               sb.Insert(0, t & 1);
               Console.WriteLine(sb);
           }

Utsav ScreamER · Answer 4 · 2015-08-22T08:21:00

C#

static void Main(string[] args)
        {
           
            for (int i = 0; i <= 5; i++)
            {
                for (int j = 0; j <= i; j++)
                {
                    if (j % 2 == 0 && i % 2 == 0)
                    {
                        Console.Write("1");
                    }
                    else if (j % 2 != 0 && i % 2 != 0)
                    {
                        Console.Write("1");
                    }
                    else
                    {
                        Console.Write("0");
                    }
                }
                Console.Write("\n");
            }
            Console.Read();
        }

correct codes for displaying binary numbers triangle?????

4 solutions

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