Driver program to test function
int main ( ) { int arr [ ] = { 0 , 1 , 1 , 2 , 3 , 5 , 8 , 13 , 21 , 34 , 55 , 89 , 144 , 233 , 377 , 610 } ; int x = 55 ; int n = sizeof ( arr ) / sizeof ( arr [ 0 ] ) ;