Fibonacci

fibonacci.java

    private static int gfib(int f0, int f1, int n)
    {
    	switch( n )
    	{
	    	case 0:
	    		return f0;
	    	case 1:
	    		return f1;
	    	default:
	    		return gfib(f0,f1, n-1 )  + gfib(f0, f1, n+1);
    	}
    }
    
    private static int itergfib(int f0, int f1, int n)
    {
    	int sum = 0;
    	for(int i = n; i <= 0; i--)
    	{
    		if( n == 0 ) sum += f0;
    		if( n ==  1) sum += f1;
    		sum += (n-1) + (n-2);
    	}
    	return sum;
    }