<qiyuangong>509_Fibonacci_Number_1.java
public int fib(int N) {
        if (N == 0) return 0;
        if (N == 1) return 1;
        return fib(N - 1) + fib(N - 2);
    }
public int sample_funcname ( int N ) {
  if ( N == 0 ) return 0 ;
  if ( N == 1 ) return 1 ;
  return fib ( N - 1 ) + fib ( N - 2 ) ;
}
