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Nth Element in Fibonacci Series

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Submitted on: 7/26/2008 6:31:12 PM
By: Shyam Srinivas  
Level: Beginner
User Rating: Unrated
Compatibility: C
Views: 31447
(About the author)
 
     Nth Element in Fibonacci Series
 
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//**************************************
// Name: Nth Element in Fibonacci Series
// Description:Nth Element in Fibonacci Series
// By: Shyam Srinivas
//
//This code is copyrighted and has// limited warranties.Please see http://www.Planet-Source-Code.com/vb/scripts/ShowCode.asp?txtCodeId=12261&lngWId=3//for details.//**************************************

//http://www.shyamsrinivas.info/c/N-Element-in-Fibonacci-Series.html
#include<stdio.h>
#include<conio.h>
fib(int n);
int count=0;
void main()
{
 int a,c;
 clrscr();
 printf ("\nEnter the number of terms :");
 scanf ("%d",&a);
 c=fib(a);
 printf ("\nThe %d element in fibonacci series is : %d\n",a,c);
 printf ("\nTIME COMPLEXITY : %d",count);
 getch();
}
fib (int n)
{
 int c,r,b,i;
 count=count+1;
 if (n<=1)
 {
 count=count+1;
 return (n);
 }
 else
 {
 r=-1;
 count=count+1;
 b=1;
 count=count+1;
 for (i=1;i<=n;i++)
 {
c=r+b;
count=count+1;
count=count+1;
r=b;
count=count+1;
b=c;
 }
 count=count+1;
 }
 count=count+1;
 return (c);
}


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