How Do I Create A Logic For Fibonacci In Console Application

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Hi Team,

i have the code as follows:Its working fine .i want to implement one more logic in the code
i want the output as follows:
0
.1
..1
...2
....3
.....5
......8
just ignore the dots .the output should look like this.
i want the space before the numbers .What changes i need to make .please guide me.

C#

namespace Triangle
{
    class Program
    {
        public static int Fibonacci(int n)
        {
            int a = 0;
            int b = 1;
            for (int i = 0; i < n; i++)
            {
                int temp = a;
                a = b;
                b = temp + b;
            }
            return a;
        }

        static void Main()
        {
            for (int i = 0; i < 15; i++)
            {
                Console.WriteLine(Fibonacci(i));
                Console.ReadLine();
            }
        }
    }
}

thanks
harshal

Posted 7-May-14 22:49pm

R Harshal

Updated 7-May-14 22:51pm

v3

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CHill60 · Accepted Answer · 2014-05-07T22:56:00

Solution 1

If I have understood you correctly you need to change the line Console.WriteLine(Fibonacci(i)); to display a space before each number.

You need "Composite Formatting"[^]

For example

Console.WriteLine(" {0}", Fibonacci(i));

[EDIT] - The "ignore the dots" confused me. The simplest way is to change the line Console.WriteLine(Fibonacci(i)); to

Console.WriteLine(Fibonacci(i).ToString().PadLeft(i + 1,' '));

Posted 7-May-14 22:56pm

CHill60

Updated 8-May-14 0:26am

v2

Comments

R Harshal 8-May-14 5:02am

Thanks for yur reply but i want the space like this : ignore the dots 
0 
.1 
..1 
...2 
not like this: 
0 
1 
1 
2 
3 
please guide me . 
Thanks 
Harshal

R Harshal 8-May-14 5:27am

Please anyone can help me.

CHill60 8-May-14 6:26am

I've updated my solution now that the question is clearer

R Harshal 8-May-14 6:34am

its working for me . 
thank you so much . 
but this want i want to do .I am not clever in logic ,so how can i improve it. 
 
Thanks 
harshal

CHill60 8-May-14 6:46am

The logic of your calculation is fine - as long as you understand it. The iterative approach works well here because you are storing the previous result as you go through the loop. An alternative approach would be to use "recursion" - but this will be less performant in this case (and is overkill). There is a nice example here Recursive methods using C#[^]

Be aware with your current solution that you will get overflow problems eventually if you choose a big enough number for n. Try n = 48 and see what happens - you might be surprised :-)

SwarupDChavan · Accepted Answer · 2014-05-07T23:41:00

Solution 3

C#

class Program
       {
           public static int Fibonacci(int n)
           {
               int a = 0;
               int b = 1;
               for (int i = 0; i < n; i++)
               {
                   int temp = a;
                   a = b;
                   b = temp + b;
               }
               return a;
           }

           static void Main()
           {
               for (int i = 0; i < 15; i++)
               {
                   for (int j = 0; j < i; j++)
                   {
                       Console.Write(" ");
                   }
                   Console.WriteLine(Fibonacci(i));
                   Console.ReadLine();
               }
           }

Posted 7-May-14 23:41pm

SwarupDChavan

Comments

CHill60 8-May-14 6:27am

There is a simpler way without the second loop - see my amended solution

R Harshal 8-May-14 6:29am

Where it is amended Solution?? .Please let me know.

Thankful
harshal

R Harshal 8-May-14 6:29am

yes i got it ...
thank you Sir ...

R Harshal 8-May-14 6:27am

Thank you MR.Swarup Chavan.
Its working .
one more question please,this what i want to build my logic .i want to improve my logic .
how can it possible .
please any reference ..let me know.
Thanks
harshal

SwarupDChavan 8-May-14 6:38am

Dude logic builds up slowly as you start solving certain complex problems on your own no one can teach logic thats for sure

CHill60 8-May-14 6:49am

Nope - that is experience not logic. Logic can be, and is, taught ... in several thousand educational establishments world-wide!

R Harshal 8-May-14 9:30am

Thank you for both of you ..i will keep this in mind.

SwarupDChavan 9-May-14 2:43am

Chill in institution we are not taught logic,we are just given knowledge ,logic basically implies to the implementation of this knowledge in the right place and at right time

CHill60 21-May-14 12:54pm

Sorry SwarupDChavan ... Universities all over the world offer degrees in this ancient discipline. Some even provide free courses on-line e.g. Introduction to Logic[^]