Kata FizzBuzz with Feature Toggle (C++) for the 14th coding dojo of bjdp.org. For requirements of this kata (in Chinese), please see http://mp.weixin.qq.com/s?__biz=MjM5MjEwNTEzOQ==&mid=200082650&idx=1&sn=c9cc2c86f989a931bb21b3fd8c2ab55c#rd