simple function to generate Fibonacci series.

fibonacci_number_generator

float golden_ratio = 1.61803398874989484820;
float root_5 = 2.2360679774997896964091736687313;
int get_fibonacci(int n){
   float fib_num = 0.0;
   fib_num = (powf(golden_ratio,(float)n) - powf(1 - golden_ratio,(float)n)) / root_5;
   return (int)fib_num;
}